2024-03-29T13:17:02Z
http://jurnal.upnyk.ac.id/index.php/eksergi/oai
oai:ojs.jurnal.upnyk.ac.id:article/9955
2023-07-14T03:54:14Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9955
2023-07-14T03:54:14Z
Eksergi
Vol 20, No 2 (2023); 124-130
Study of Linear Alkylbenzena Sulfonate (LAS) Adsorption Isotherms in Detergent Wastewater Using Coffee Grounds and Coconut Dregs Biosorbents
Septiani, Mimin
Darajat, Zakiyah
Yunus, Muhammad Arham
Ole, Maria Assumpta Nogo
Ilma, Zuhrotul Fikri
2023-07-03 10:19:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9955
Adsorption;Coffee ground; Coconut Dregs; Linear Alkyl Benzena Sulfonat
id
One of the efforts to minimize the impact of detergent waste pollution is by adsorption using coffee dregs and coconut dregs adsorbents. The purpose of this study was to determine the optimum mass of coffee grounds and coconut pulp as adsorbents, to compare the effectiveness of their absorption in decreasing levels of Linear Alkyl Benzene Sulfonate, and to study their adsorption isotherm models. This research was conducted in batches with variations in the mass of each adsorbent, namely 1 gram, 2 grams, 3 grams, 4 grams and 5 grams. This research was conducted in batches with variations in the mass of each adsorbent, namely 1 gram, 2 grams, 3 grams, 4 grams and 5 grams. The detergent waste samples were contacted with the adsorbent for 30 minutes and then the absorption capacity was tested using the Methylene Blue test method. The results showed that the optimum absorption of LAS content from coffee grounds and coconut pulp adsorbents occurred at a mass of 2 grams with the greatest increase in absorption efficiency index Coconut dregs adsorbent is more effective than coffee dregs because it can absorb up to 37%, while coffee dregs are only 10% with the same adsorbent mass of 5 grams. The adsorption isotherm model of the 2 types of adsorbents refers to the Langmuir equilibrium with R2 values for coffee grounds 0.8651 and coconut pulp 0.9868.
oai:ojs.jurnal.upnyk.ac.id:article/5304
2022-11-07T10:13:06Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5304
2022-11-07T10:13:06Z
Eksergi
Vol 19, No 1 (2022); 6-9
Magnetite Surface Modification with Silica and Its Application as Adsorbent of Heavy Metal Ion Nickel and Manganese
Mahmuda, Diah; Politeknik Negeri Sambas
2022-04-05 13:18:27
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5304
id
This study aims to synthesize magnetite by a co-precipitation method. The prepared adsorbent magnetite coated by silica for the efficient removal nickel and manganese ions from the aqueous solutions. The prepared samples have characterized by several techniques like FTIR spectroscopy, XRD, and TEM. Surface modification causes the magnetite ability of removing metals ions increasing more than 98%. Preliminary results indicate that magnetite coated silica may be used as an adsorbent for removal of nickel and manganese ions from wastewater.
oai:ojs.jurnal.upnyk.ac.id:article/1354
2015-12-14T21:43:02Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1354
2015-12-14T21:43:02Z
Eksergi
Vol 12, No 2 (2015); 12-22
Biosurfactant
Reningtyas, Renung; Chemical Engineering, Faculty of Industrial Technology, UPN "Veteran" Yogyakarta
Mahreni, M; Chemical Engineering UPN "Veteran" Yogyakarta
2015-12-01 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1354
en
Surfactant is an amphipilic chemical structure which contains the hydrophobic and hydrophilic groups. Surfactant has ability to lower surface tension between two liquids. Surfactant has been used in many industries, such as cosmetics, food, textile, petroleum, and pharmacy industry. Nowdays, most of surfactant used in industries are still based on petroleum resources. The applicationsof this nonbiodegradable surfactant in industry promote environmental problem. Biosurfactant is a biodegradable surfactant that produced from microorganism or natural resources. Biosurfactant produced from microorganism contains Rhamnolipid and Lipopeptide. Surfactin and Dactomicin made from microorganism with antibacterial activity are the examples. Bottle necks of the production of biosurfactant form microorganism are their slow process, high purification cost, and high product price. Biosurfactant from natural resources are potentially produced in large scale due to their fast process and relatively cheap raw material. Metil Ester Sulphonate (MES) is one of biosurfactant produced from natural resources (from palm oil). The other example is biosurfactant from esterification of carbohydrate and carboxylic acid. This paper reviews the literatures dealing with biodegradable surfactant development which can be used as a reference of a research path way and an industrial scale production of biodegradable surfactant.
oai:ojs.jurnal.upnyk.ac.id:article/7614
2022-08-15T04:32:42Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7614
2022-08-15T04:32:42Z
Eksergi
Vol 10, No 1 (2010): Versi Cetak; 34-39
KOPOLIMERISASI CANGKOK METIL METAKRILAT PADA PATI TAPIOKA MENGGUNAKAN INISIATOR CERIC AMMONIUM NITRAT
Murni, Sri Wahyu
2022-08-15 02:24:14
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7614
Telah dilakukan kopolimerisasi cangkok antara tepung pati tapioka dengan metil metakrilat menggunakan inisiator cerric ammonium nitrat, hasilnya berupa kopolimer cangkok pati-metil metakrilat/ Starch-graft-Polimetil Metakrilat (S-g-PMM). S-g-PMM yang dihasilkan dari sintesis ini merupakan produk yang dapat dimanfaatkan sebagai penyerap air, selain itu kopolimer ini dapat digunakan sebagai material pengganti yangbersifat biodegradable. Penelitian dilakukan dengan mencampurkan pati tapioka yang dilarutkan dalam air dan diaduk sampai homogen dalam labu leher tiga. Kemudian ditambahkan inisiator inisiator cerric ammonium nitrat (CAN) yang telah dilarutkan dalam HNO3 0,5 N, serta monomer metil metakrilat. Setelah reaksi selesai ditambahkan metanol. Padatan S-g-PMM yang diperoleh diuji strukturnya menggunakan FTIR, daya serap air dan daya urainya Hasil menunjukkan bahwa pada perbandingan 8,5 g tepung tapioka dengan 12 ml metil metakrilat (perbandingan MM:pati tapioka =1,3201:1), suhu 40oC, dihasilkan S-g-PMM dengan yield 41,74%, kapasitas absorbsi air 375% dan kemampuan terurai secara alami 6,42%.
oai:ojs.jurnal.upnyk.ac.id:article/3300
2022-11-07T10:30:19Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3300
2022-11-07T10:30:19Z
Eksergi
Vol 17, No 1 (2020); 15-19
Steam Distillation of Essential Oil from Lemongrass (Cymbopogon citratus) using Microwave Pretreatment
Murni, Ir., MT, Sri Wahyu; Teknik Kimia UPN "Veteran" Yogyakarta
Setyoningrum, Tutik Muji
Haryono, Gogot
2020-04-03 08:28:15
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3300
serai dapur, minyak atsiri, hidrodestilasi, microwave, pretreatment
en
Essential oils from lemongrass (Cymbopogon citratus) containing citral are very potential to be used in food and pharmacy industries. The process of isolating essential oils is still constrained by its low yield. In order to increase yield, in this research, isolation of essential oil by steam distillation method was carried out using microwave pretreatment. The results showed that pretreatment using microwave for 2 minutes had the effect of increasing yield up to 1.4 times compared to without pretreatment. The essential oil produced using microwave pretreatment had physical properties (colour, odor, density, and refractive index) similar to those without pretreatment. Composition analysis by GC-MS showed that essential oils extracted using microwave pretreatment and without pretreatment contain geranial (Ecitral or citral-a), neral (Z-citral or citral-b) and mircena as the main components.
oai:ojs.jurnal.upnyk.ac.id:article/10669
2024-02-19T03:48:35Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10669
2024-02-19T03:48:35Z
Eksergi
Vol 21, No 1 (2024); 9-16
Adsorpsi Zat Warna Remazol Brilliant Blue R Pada Limbah Industri Batik Menggunakan Adsorben dari Mahkota Buah Nanas
Siswanti, Siswanti
Oktafiana, Afifah Hasna
Putri, Yobellya
2023-12-05 04:19:28
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10669
mahkota buah nanas; karbon aktif; limbah batik; Remazol Brilliant Blue R; adsorpsi
en
Industri batik banyak yang menggunakan zat warna reaktif Remazol Brilliant Blue R (RBBR) pada proses pewarnaan. RBBR merupakan zat warna yang memberikan warna cerah namun sulit terdegradasi dan bersifat karsinogenik. Proses pewarnaan ini menghasilkan limbah cair yang berbahaya sehingga perlu dilakukan pengolahan. Adsorpsi menggunakan karbon aktif sebagai adsorben menjadi salah satu cara untuk menurunkan konsentrasi RBBR dalam limbah cair industri batik. Dalam penelitian ini adsorben yang digunakan berasal dari mahkota buah nanas, dengan pertimbangan kandungan selulosanya tinggi serta mahkota buah nanas masih jarang dimanfaatkan dan hanya menjadi sumber limbah di lingkungan. Variabel dalam penelitian ini adalah massa adsorben 1, 2, 3, 4, dan 5 gram serta waktu kontak proses adsorpsi 10, 20, 30, hingga 110 menit. Penelitian dimulai dari pembuatan adsorben mahkota buah nanas, penentuan panjang gelombang maksimum, pembuatan kurva standar, serta pengukuran kadar RBBR sebelum dan setelah adsorpsi dengan menggunakan spektrofotometer UV-Vis. Adsorben mahkota buah nanas berukuran -80 + 100 mesh, dengan kadar air 13,33 ± 0,0245%, luas permukaan 297,9 m2/g, volume pori 29,91 cm3/g dan berdiameter pori 2079,47 Å. Dengan penggunaan adsorben 4 gram dan waktu kontak 100 menit, menghasilkan kemampuan adsorpsi maksimum 74,55% dengan kadar RBBR akhir pada limbah 47,0209 ppm.
oai:ojs.jurnal.upnyk.ac.id:article/378
2015-04-09T22:21:11Z
eksergi:ART
oai:ojs.jurnal.upnyk.ac.id:article/7545
2022-08-15T04:33:34Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7545
2022-08-15T04:33:34Z
Eksergi
Vol 9, No 1 (2008): Versi Cetak; 11-15
Sintesa Kalsium Karbonat Presipitat
Ariono, Carnila D
2022-08-09 03:27:41
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7545
en
Calcium carbonate is one of the chemical substances, which is largely used in chemical industries such as coating and fìlters in paper, toothpaste, paint etc. Based on bulk density, this substance is classified into two kinds, which are light and heavy calcium carbonate. The need of calcium carbonate especially the light type is increased with the development of the chemical industries, but the domestic production of calcium carbonate cannot fulfill this need, so still needs to be improved. Precipitated calcíum carbonate (PCC) is the light type of high purity of calcium carbonate which is yielded from precipitation processes. Lìght PCC has intenal bulk density between 0,15-0.60 g/cm'. Synthesis of PCC from límestone consist of calcination, hydration and carbonation processes. In the calcination process, Iimestone is burnt in a high temperature to form CaO. The calcination process is usually done by the small scale industry. In the hydration process, CaO react with water to form Ca(OH), solution. Then in the carbonation process, Ca(OH),react with CO2 to form light PCC.The experíment is focused in hydration and carbonatation processes has purpose to learn the ffict of ratio of CaO/HrO during hydration process and the effect of CO2, dilution by N, gas flow rate during carbonøtion process against percentage of CbaO converted to PCC. The result of this experiment are (l) maximum conversion of CaO to PCC is 50% and (2) the quality of product light PCC has fulfilled the specification for paper filler
oai:ojs.jurnal.upnyk.ac.id:article/2139
2018-01-01T18:47:11Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2139
2018-01-01T18:47:11Z
Eksergi
Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 12-17
Pengaruh Variasi Komposisi Pada Campuran Limbah Cair Aren dan Kotoran Sapi Terhadap Produksi Biogas
Ramdiana, Ramdiana; Program Studi Teknik Lingkungan Universitas Teknologi Sulawesi, Makassar,
Jl. Talasalapang No.51 Makassar
2017-12-31 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2139
id
Limbah cair aren dan kotoran sapi merupakan substrat yang baik dalam pembuatan biogas, karena tanaman aren mengandung bahan organik yang tinggi dan kotoran sapi mengandung bakteri penghasil gas metan. Nilai rasio C/N dari limbah cair aren yaitu 15 dan perlu dicampur dengan limbah yang memiliki rasio C/N lebih tinggi dari kotoran sapi yaitu 24. Penelitian dilakukan dengan proses anaerobic reactor. Penelitian ini menguji 5 variasi komposisi campuran kotoran sapi dan limbah cair aren yaitu 1 : 0,25, 1: 0,5, 1 : 0.75, 1 : 1 dan 1: 1,25. Masing-masing sampel dimasukkan ke dalam digester dengan kapasitas 14 liter terdiri dari 11 liter campuran limbah dan 3 liter air, kemudian diinkubasi secara anaerob dalam ruang bersuhu antara 25oC – 30oC selama 50 hari. Parameter yang diukur berupa volume biogas, gas metan, nilai C/N rasio, pH dan suhu. Pengamatan volume gas dilakukan setiap hari dengan menggunakan gas holder dan konsentrasi gas metan diuji dengan Gas Chromatography (GC). Hasil penelitian menunjukkan bahwa komposisi campuran kotoran sapi dan limbah cair aren 1:1,25 menghasilkan biogas tertinggi dengan kadar gas metan 42%.
oai:ojs.jurnal.upnyk.ac.id:article/8990
2023-04-10T03:14:43Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8990
2023-04-10T03:14:43Z
Eksergi
Vol 20, No 1 (2023); 15-20
Color Degradation of Napthol Jeans with TiO2-SiO2 Photocatalyst from Karangwuni Beach Sand, Kulon Progo
Amelia, Shinta
Shitopyta, Lukhi Mulia; Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Kampus 4 Ringroad Selatan, Tamanan, Banguntapan, Bantul, DI Yogyakarta, 55164
W, Mila Utami; Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Kampus 4 Ringroad Selatan, Tamanan, Banguntapan, Bantul, DI Yogyakarta, 55164
Sriyana, Ida; Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Kampus 4 Ringroad Selatan, Tamanan, Banguntapan, Bantul, DI Yogyakarta, 55164
2023-03-02 03:28:04
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8990
id
The industries that produce the most liquid waste in Indonesia are the batik and textile industries. Napthol dyes are the most widely used dyes as dyes or batik dyes which are completely non-biodegradable and can cause cancer, digestive disorders, and weakening of the body's resistance due to disease and environmental pollution. One of the processing methods currently being developed to degrade color in liquid waste is the photocatalyst method. The photocatalyst method can use a photocatalyst semiconductor in the form of TiO2 with a supporting material in the form of SiO2. SiO2 as a supporting material can be obtained from the utilization of the local potential of Karangwuni Kulon Progo beach sand. Dye processing was carried out by varying the irradiation time and concentration of Naphtol Jeans. The degradation process was applied to a 25 ml sample solution with the addition of 5 gr/L catalyst for 24 hours, 48 hours, 72 hours, 96 hours, and 120 hours of irradiation. This study resulted in the highest reduction in naphtol concentration at the concentration variable of 100 ppm with a percentage of 44.4687% and a long irradiation time of 120 hours.
oai:ojs.jurnal.upnyk.ac.id:article/4572
2022-11-07T10:15:39Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4572
2022-11-07T10:15:39Z
Eksergi
Vol 18, No 1 (2021); 13-17
Production of briquettes from Indonesia agricultural biomass waste by using pyrolysis process and comparing the characteristics
Murni, Sri Wahyu
Setyoningrum, Tutik Muji
Nur, Muhamad Maulana Azimatun
2021-04-27 01:44:29
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4572
agriculture; binder; biomass waste; briquette; charcoal; pyrolysis.
en
Indonesia biomass waste is a potential feedstock as a source of renewable energy since it can be converted into carcoal briquettes. However, the production of the briquettes using pyrolysis process using the agricultural waste was lacking. In this research, briquette was made from palm shells, corncob and soybean stem wood due to its high availability and have high cellulose content. The purpose of this research was to produce briquettes from three kind of raw materials by employing pyrolysis process and compared the characteristics. The briquette was made from different type of raw materials (palm shells, corncob and soybean stem) and the concentration of binder : 3-7 %. Pyrolysis was done at 500 °C, and 100 kg / cm2 of pressing pressure. Results showed that, the best charcoal briquette was achieved from palm shells by using 5% binder, which resulted 4,1% moisture content, 3.4% ash content, 15% volatile matter content, 77.5% carbon content, 7075 cal/g calorific value and 1.4 kg/cm2 compresive strength. It is found that the concentration of binder and raw material influenced the quality of the briquettes. In overall, the production of the briquettes by employing pyrolysis method could meet the standard.
oai:ojs.jurnal.upnyk.ac.id:article/337
2022-08-15T04:32:21Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/337
2022-08-15T04:32:21Z
Eksergi
Vol 10, No 2 (2010): Versi Cetak; 32-35
Pengaruh Kadar Garam Dapur Terhadap Suhu Makanan yang Dimasak dengan Microwave
Nuri,MT, Wasir; Jurusan Teknik Kimia Fakultas teknologi Industri
UPN”Veteran” Yogyakarta
Jln.SWK 104 Lingkar utara Condongcatur, Yogyakarta 55283.
Telp//Fax (0274)486889
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/337
Many people cook by using microwave oven. There are some reasons for health and the others for practice. Generally they do not know that food temperature is depends on amount of polar compound. Salt is polar compound hence salt content influenced temperature of food. The objective of research was to determine salt content to food temperature which is cooked by microwave. This research was simulated by mixing 20 g starch and 20 g salt water with salt variation from 0 to 3,2%. The mixed was put into Becker glass 100 cc. and heated in microwave oven in low power level until medium. The temperature was measured every 2,5 minute until 15 minute. This research show that salt and electricity power influence the temperature. For examples electricity power level-low, in 15 minute the temperature increase from 37oC to 73 oC at 3,2 % salt content, while at salt 0% and electricity power medium level the temperature increase up to 90 o C.
oai:ojs.jurnal.upnyk.ac.id:article/7577
2022-08-15T04:33:16Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6-10
2022-08-15T04:33:16Z
Eksergi
Vol 9, No 1 (2009): Versi Cetak
Koefisien Perpindahan Massa pada Ekstraksi Protein dari Biji Kecipir dengan Pelarut NaOH
Pawignyo, Harso; Teknik Kimia, UPN "Veteran" Yogyakarta
Siswanti, Siswanti
2022-08-11 04:03:09
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6-10
en
Koefisien Perpindahan Massa pada Ekstraksi Protein dari Biji Kecipir dengan Pelarut NaOH.
oai:ojs.jurnal.upnyk.ac.id:article/1969
2022-11-07T10:31:11Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1969
2022-11-07T10:31:11Z
Eksergi
Vol 16, No 1 (2019); 1-6
Extraction of Cashew Seed Skin Oil from the Waste of Cashew Seed Skin (Anacardium occidentale) with Ultrasonic Aid
Rengga, Wara Dyah Pita
Hartanto, Dwi -
Wibowo, Bayu Tri
Setiawan, Mohammad
2019-07-23 08:24:27
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1969
id
Cashew shell waste can be utilized as a raw material for one of the tile paint and brake oil industries. The conventional extraction process mostly provides less mass transfer, so the extraction process is slow and not maximal. Excessive amounts of solvents are often used but make the process expensive and pollute the environment. The right solution in extracting is with the help of ultrasonic. This study aims to obtain an optimization of cashew oil extraction process using ultrasonic waves with a frequency of 42 kHz. The effect studied was the ratio of cashew powder to n-hexane solvents and extraction time. The surface response method with the design of Central Composite Design was used to obtain a mathematical model that illustrates the relationship between the yield of cashew shell oil to the ratio and time of extraction. The results showed that the optimum condition of cashew nut oil extraction in the comparison composition of cashew skin powder against n-hexane solvent was 1: 3.25 (g / g) for 90 minutes with a yield of 36.15%. Cashew skin oil contains anacardic acid, cardanol, and other phenol compounds.
oai:ojs.jurnal.upnyk.ac.id:article/4566
2023-01-15T05:33:08Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4566
2023-01-15T05:33:08Z
Eksergi
Vol 18, No 2 (2021); 71-76
The Involving Laccifer Lacca Kerr as Resin to Fabricate Coconut Husk Biocomposite
Ilcham, Adi; Chemical Engineering, Faculty of Industrial Technology, UPN "Veteran" Yogyakarta
Murni, Sri Wahyu
Hermawan, Axel Adam
Ariesta, Axl
2021-11-01 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4566
id
Nowadays, biocomposite materials are required for particular needs. Coconut husk has a potential to be biocomposite using a resin produced by the laccifer lacca kerr (kerria lacca), an insect. This work was aimed to study the use of the lacca kerr resin to produce a biocomposite of coconut coir based. In the experimental, firstly, the cleaned coconut husks were chopped then mixed with lacca kerr resin and alcohol to make a composite dough. Then the dough were pressed with 130 psig at a 100oC within15 minutes. After that, the biocomposite was allowed to ambient temperature, then it properties were observed. To find the best product properties, the ratio of basic materials were varied. The ratio of coconut husk: lacca kerr resin was used ranged from 0.6 g/mL to 1.4 g/mL. The characterization of product properties were carried out based on ASTM D-638 and under guidance of the Indonesian National Standard (SNI) 03-2105-2006. Based on results, it was found that the best biocomposite observed had properties such as density of 0.45 g/cm3 , water content of 8.8% (maximum SNI requirement of 14%), degree of swelling of 67.6%, tensile strength of 43.4 kgf / cm2 (minimum SNI requirement of 3, 1 kgf / cm2 ), Young's modulus of 1219.2 kgf/cm2 , elongation of 67.7%, conductivity of 1.8 10-8 /.m. Some of these characteristics have met the Indonesian national standard (SNI).
oai:ojs.jurnal.upnyk.ac.id:article/366
2015-09-18T03:35:57Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/366
2015-09-18T03:35:57Z
Eksergi
Vol 11, No 2; 19-23
Effect of Bicarbonate, Iron, and Salt, on Lipid Productivity of Chlorella sp. Extracted by Osmotic Shock Method
Azimatun Nur, Muhamad Maulana; Universitas Pembangunan Nasional "Veteran" Yogyakarta
2014-12-28 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/366
id, en
Fossil energy depletion in Indonesia can not be neglected. It is needed
renewable energy that environmental friendly and meets demand consumption. One of promising biofuel in Indonesia is biodiesel. However lack of feedstock is main problem due to increasing of customer needs. Chlorella sp. is kind of microalgae that potential for biodiesel source. This research is purposed to optimize influence of bicarbonate, iron, and salt in growth, biomass, and lipid productivity of Chlorella sp. The research was done in 2^3 factorial design in 6 days. Cultivation was maintained in pH 6,2-7,4 and 6000 lux light intensity. Extraction was done by osmotic shock method using wet biomass. Result indicates that addition of bicarbonate and iron give possitive effect on lipid productivity. Addition of salt give possitive
effect on biomass and growth rate.
oai:ojs.jurnal.upnyk.ac.id:article/7610
2022-08-15T04:32:42Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7610
2022-08-15T04:32:42Z
Eksergi
Vol 10, No 1 (2010): Versi Cetak; 8-14
THE MANUFACTURE ELECTRODE PROPERTIES ON THE HYDROGEN REACTION KINETIC IN PMFC
Sitanggang, Ramli
2022-08-15 02:24:11
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7610
Economic and environmental issues are forcing industry to e4rlore altemative energy sources for vehicles and electronic devices. Much effort is being put into fuel cell research because tliey hold the promise of high energy density, low environmental impact, and broad applicability. Hydrogen is the main source of fuel for high performance applications with water being the only product, These attributes make the hydrogen fuel cell a practical replacement for many power sources that are inefficient and environmentally unfriendly. T'he basic functionalunit of the fuel cell is the membrane electrode assembly (MEA). The MEA is the loci where the electrochemistry occurs to produce electricity from hydrogen and oxygen. The MEA consists of the polymer membrane with an electrode adhered to either side. The electrode contains the platinum electro-catalyst dispersed on carbon black with a polymer binder. The effect of gas diffusion electrode to the perfonnance of fuel cells was studied in a single cell. Performance dependence on the intrinsic material properties rvas studied by Fuel cell test system. The interdependence between gas diffusion electrode and fuel cell performance was covered. Long-term stability of the PEMFC stack built in the l¿boratory of Advanced Energy Systems was dernonstrated by operating it continuously.
oai:ojs.jurnal.upnyk.ac.id:article/3088
2022-11-07T10:32:57Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3088
2022-11-07T10:32:57Z
Eksergi
Vol 16, No 2 (2019); 47-52
Chitosan Concentration and Cross-linker Volume Effect on The Release Kinetic of Red Ginger Oleoresin Microcapsule in Simulated Intestinal Fluid (SIF) Medium
Jayanudin, Jayanudin; Universitas Sultan Ageng Tirtayasa
Fahrurrozi, Moh.; Universitas Gadjah Mada
Wirawan, Sang Kompiang; Universitas Gadjah Mada
Rochmadi, Rochmadi; Universitas Gadjah Mada
2019-11-18 08:12:44
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3088
kinetika release, kitosan, oleoresin jahe merah, stimulated intestinal fluid
ind
Red ginger oleoresin contains components that can be used as antioxidants. Release kinetics studies are used to provide doses to achieve the desired drug concentration. The purpose of this study was to determine the release kinetics of red ginger oleoresin microcapsules based on changes in chitosan concentration and volume of cross-linker and determine the diffusion coefficient of red ginger oleoresin through microcapsule walls. Red ginger oleoresin microcapsules were prepared from a mixture of red ginger oleoresin in chitosan solution and stirred to form an emulsion. After that, it was added to corn oil and stirred again to form a second emulsion. Glutaraldehyde saturated toluene was added dropwise after finished added the 25% glutaraldehyde solution and remains stirred for 2 hours. Red ginger oleoresin microcapsules were separated and washed with petroleum ether and hexane, then dried in an oven. Microcapsules inserted in the release medium (simulated intestinal fluid) without enzymes, and then the samples were analyzed using a UV-vis spectrophotometer to determine the absorbance. The release kinetics models used were zero order, first order, Higuchi, Korsmeyer-Peppas, and Hixon-Crowell. The highest correlation coefficient (R2) was obtained from the Korsmeyer-Peppas release kinetics model, R2 = 0.73-0.85 with the value of n = 0.39-0.41. Based on the n value, the release mechanism of red ginger oleoresin microcapsules was Fickian diffusion. The diffusion coefficients obtained were 2,807 x 10-13 - 3,675 x 10-13 cm2 /sec.
oai:ojs.jurnal.upnyk.ac.id:article/10163
2024-02-19T03:56:25Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10163
2024-02-19T03:56:25Z
Eksergi
Vol 20, No 3 (2023); 191-194
The Concentration Effect of Sembukan Leaf (Paederia foetida L) Extract as Ferrous Metal Corrosion Inhibitor to HCl 1M Solution and Sea Water
Novitaningrum, Elis; Universitas PGRI Madiun
Setiawan, Mohammad Arfi
Trisnawati, Ade
2023-11-01 04:36:29
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10163
id
The massive development of industry creates human using various of metal which available in the nature for being contruction, for example a Iron metal. The iron is a transition metal on periodic table which often used on industry and building construction, however iron is a corrodiable metal. The metal corrotion must be solved cause create many of loss. Therefore, the study aimed to examine sembukan leaf extract in various consentration, 0%, 2%, 4%, 6%, 8% to seawater and HCl 1M during 7 days of contact moment. The correlation strenght between variable using regression linier method. Based on study that the higher consentration inhibitor and the corrotion rate decreases. He highest efficiency using seawater is 89,9% and using HCl 1 is 68,9%. The highest correlation between variable is 93,2% using seawater. Th e conclution is sembukan leaf extract effective to protect iron corrotion of seawater
oai:ojs.jurnal.upnyk.ac.id:article/319
2014-10-29T09:43:26Z
eksergi:ART
oai:ojs.jurnal.upnyk.ac.id:article/6036
2022-11-07T10:12:47Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6036
2022-11-07T10:12:47Z
Eksergi
Vol 19, No 2 (2022); 71-76
Modification of Natural Carbolic Acid from Arpus wit Lemongrass Essential oil as a Disinfectant
nandari, wibiana wulan
Hadi, Faizah; Universitas Pembangunan Nasional "Veteran" Yogyakarta
Puspitasari, Mitha; Universitas Pembangunan Nasional "Veteran" Yogyakarta
Nugraheni, Susanti Rina; Universitas Pembangunan Nasional "Veteran"Yogyakarta
Mahargiani, Titik
2022-07-28 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6036
id
Carbolic acid is a cleaning fluid or disinfectant that can be used to clean various kinds of surfaces, especially floors. Carbolic acid is used to prevent germs and viruses from growing so as to prevent disease and its spread. Most housewives often use chemical-based floor cleaners that are immediate or more practical. Long-term and too frequent use can be harmful to the body and the environment. Therefore, one solution to minimize this is to use natural ingredients that are already available and developed in Lubuklinggau City, such as lemongrass to be used as carbolic acid. The preparation begins by dissolving the arpus into the NaOH solution until it dissolves, then adding a mixture of pine oil, teepol and propylene glycol until everything is homogeneously mixed. Carbol is ready to use. The resulting product is carbolic floor disinfectant. Modified natural carbolic acid from arpus and lemongrass can be used as a disinfectant because based on the results of research that has been done it can kill E-coli bacteria and has a fairly high effectiveness with an inhibition zone of 19.2 mm.
oai:ojs.jurnal.upnyk.ac.id:article/2006
2017-11-16T13:22:59Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2006
2017-11-16T13:22:59Z
Eksergi
Vol 14, No 1 (2017): Eksergi Volume 14 No 1 2017; 1-6
PENGARUH TINGKAT KEASAMAN PADA KARAKTERISTIK ZEOLIT ALAM SEBAGAI ADSORBEN AMMONIUM HIDROKSIDA (NH4OH)
Fajar Mukti, Nur Indah; Universitas Islam Indonesia
2017-09-09 03:27:12
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2006
en
Natural zeolite is a mineral that are widely available in Indonesia. Among many other benefits, the natural zeolite can be used as an adsorbent to reduce water pollutant caused by ammonia compounds and combination of derivatives. This research aimed to study the effect of different acids on zeolite characterizatics as adsorbent of ammonium hydroxide (NH4OH). The effect of acids addition on natural zeolite was studied by varying the concentration of H2SO4(0,5 N; 3 N and 5 N) and concentration of H3PO4 (0,5 N; 3 N and 5 N). In this study, zeolite surface was observed by Fourier Transform Infrared (FTIR). Results were showed that the amount of NH4OH adsorbed on H- zeolite has a maximum (23,6 mg/gram zeolit) at 5 N H2SO4. From the NH4OH uptake experiment, it was noted that zeolite obtained from H-Zeolite-H2SO4 has higher NH4OH adsorption capacity than that of zeolite obtained from H-Zeolite-H3PO4. The adsorption capacity of H-Zeolite-H2SO4, H-Zeolite-H3PO4, are 23,6 mg/g and 12,9 mg/g, respectively. FTIR analysis was showed that NH4OH adsorbed on the surface of H- zeolite on Brønsted acid peak.
oai:ojs.jurnal.upnyk.ac.id:article/6123
2022-11-18T06:48:30Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6123
2022-11-18T06:48:30Z
Eksergi
Vol 19, No 3 (2022); 148-152
Physical Property Analysis of Biodegradable Film Made from Garut Starch, Glycerol, and Citric Acid
Istiani, Alit; Universitas Pembangunan Nasional Veteran Yogyakarta
Yusuf, Yusmardhany; Universitas Pembangunan Nasional Veteran Yogyakarta
Irfandy, Fauzan; Universitas Pembangunan Nasional Veteran Yogyakarta
Puspitasari, Mitha; Universitas Pembangunan Nasional Veteran Yogyakarta
2022-11-14 03:12:32
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6123
LPPM UPN Veteran Yogyakarta
id
The biodegradable film is an attempt to reduce the use of plastics that cannot be decomposed by nature. This study described biodegradable films produced from arrowroot starch using the casting method. As a plasticizer and crosslinker, glycerol and citric acid are added. The investigation results indicate that the biodegradable film has a clear white color; the greater the amount of starch, the more opaque the color. The tensile strength test results also indicate that the biodegradable film’s tensile strength will be greater the more starch is used, but its percent elongation at break will decrease, or its characteristics will become less elastic. In contrast, adding citric acid demonstrates that the tensile strength decreases due to the hydrolysis of glycosidic linkages in starch.
oai:ojs.jurnal.upnyk.ac.id:article/3732
2022-11-07T10:29:53Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3732
2022-11-07T10:29:53Z
Eksergi
Vol 17, No 2 (2020); 93-98
Kinetics of Ion Reduction of Copper from Electroplating Waste by using Electrocoagulation
Erawati, Emi
Marfiana, Kesi
2020-12-11 04:53:04
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3732
id
The electroplating process not only produces useful products but also produces waste. Copper is one of the elements contained in waste. Waste containing copper has a major impact on the environment and human health if there is no prior treatment. One way to reduce copper levels in electroplating waste is the electrocoagulation process. This study aims to investigate the efficiency of reducing the concentration of waste at various concentrations and types of electrodes and to determine the reaction rate constants of the first and second order reactions. 60, 80 and 100 mL electroplating waste were diluted with distilled water in a 500 mL measuring flask. The two plates were clamped using a statif and a 3/4 plate immersed in wastewater. The cathode and anode are connected to a 12 volt power supply with a distance between the electrodes of 2 cm and a stirring speed of 200 rpm. Samples were taken every 0; 40; 80; 120; and 160 minutes to test Cu content with AAS. Repeating the same steps for various types of electrodes, namely Al, Fe, and CuZn. The highest efficiency at various concentrations of 80 mg/L and types of electrodes of Fe were 67.66% and 92.82% in that order. The rate constants of the first and second order reactions are 0.0096 s-1 and 0.0058 ppm1 .s-1 respectively
oai:ojs.jurnal.upnyk.ac.id:article/11960
2024-03-29T04:08:03Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/11960
2024-03-29T04:08:03Z
Eksergi
Vol 21, No 2 (2024); 77-93
Scientometric Analysis of Biofilm Research in Microbial Fuel Cells: Insights into Key Research Areas and Emerging Trends
Christwardana, Marcelinus; Department of Chemistry, Diponegoro University || Master Program of Energy, School of Postgraduate Studies, Diponegoro University.
Suedy, Sri Widodo Agung; Department of Biology, Diponegoro University || Master Program of Energy, School of Postgraduate Studies, Diponegoro University.
Harmoko, Udi; Department of Physics, Diponegoro University || Master Program of Energy, School of Postgraduate Studies, Diponegoro University.
2024-03-29 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/11960
bioenergy; co-authorships; collaboration; co-occurrences; research trends
Diponegoro University
en
A scientometric investigation mapped the literature on biofilm development in Microbial Fuel Cells (MFCs), revealing promising renewable energy prospects and waste treatment solutions. The analysis encompassed 16898 sources, predominantly research articles (12571), along with review papers, conference papers, books, and other publications. Network analysis highlighted key research clusters and subtopics, including biofilm characterization, electrode optimization, and monitoring/control technologies. Insights from biofilm research have led to innovative approaches like biofilm engineering and advanced analytical techniques, enhancing real-world applications. Integration of MFCs into sustainable development underscores biofilms' potential as eco-friendly and economically viable components of energy production systems.
oai:ojs.jurnal.upnyk.ac.id:article/331
2014-12-07T17:16:00Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/331
2014-12-07T17:16:00Z
Eksergi
Vol 11, No 1; 37-42
Pengaruh Jenis dan Konsentrasi Aditif Terhadap Karakteristik Faktis Coklat dari Minyak Jarak Pagar
Puspitasari, Santi; Pusat Penelitian Karet
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/331
Processing aid is an important chemical which is added to the rubber compound preparation. This ingredient will facilitate rubber mixing with other rubber chemicals. Brown factice is a processing aid used in the rubber article industries, especially in the rubber hose manufacture. This material is synthesized by polymerization of vegetable oil with sulfur at certain temperature. This reaction produces a crosslinking of the triglyseride molecules connected by sulfur. The crosslink causes the brown factice texture become elastic or rubberlike. The condition of the polymerization reaction and the compotition of reactant affect the brownfactice quality. The classification of brown factice is based on its visual and chemical properties. The aim of the research was to study brown factice formulation which produce the optimum polymerization condition and the best quality of brown factice. In this experiment the brown factice was synthesized from Jatropha curcas oil at the laboratory scale using TMTD and ZDEC accelerators, by 1.0 pho dosage. The polymerization was conducted at 140oC on 30.0 pho of sulphur, while the ZnO and Na2CO3 dosage was varied at 0.25 and 0.50 pho. The reaction time, temperature, and exothermic step were observed conscientiously during the reaction. The brown factice rendemen was calculated and its quality was characterized. The result showed that the condition of the polymerization reaction using ZDEC and TMTD as accelerator was not significantly different, but the quality of brown factice using ZDEC was better than TMTD (brighter color, lower free sulphur content, and acetone extract content). The best quality of brown factice was obtained from the formulation of ZDEC as accelerator, 0.5 pho of ZnO and 0.5 pho of Na2CO3.
oai:ojs.jurnal.upnyk.ac.id:article/7557
2022-08-15T04:33:34Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7557
2022-08-15T04:33:34Z
Eksergi
Vol 9, No 1 (2008): Versi Cetak; 70-74
Produksi Poli-β-hidroksibutirat (PHB) Menggunakan Bakteri Bulkhoderia cepacia
Murni, Sri Wahyu; Chemical Engineering UPN "Veteran" Yogyakarta
Gunarto, Gunarto
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7557
Poly-β-hydroxybutyrate (PHB); biodegradable plastics.
en
Plastics have important roles nowadays. However, its non-biodegradable property potentially makes a great problem because of the accumulation of its waste. Therefore, many researches about biodegradable plastics have been developed. Poly-β-hydroxybutyrate (PHB) is an alternative material to produce biodegradable plastics. The objectives of this research are to study the production of PHB by using Bulkhoderia cepacia bacteria and soluble starch substrate and determine the kinetics parameters including maximum specific growth rate (μmaks), saturation constant (Ks), and yield ratio of product-to-bacterial cell (YP/X). Fermentation was conducted at room temperature by using Ramsay medium with soluble starch at certain concentrations. The starter of Bulkhoderia cepacia incubated for 24 hours was inoculated as many as 10% by volume. The PHB product and dry cell weight were analyzed at certain several time intervals. This experiment was repeated at variation of phosphate concentrations.This research showed that the optimum cell growth and PHB production was obtained at soluble starch concentration of 8 g/100 ml and growth period of 72 hours. At this condition, the results were the dry cell weight of 7.5 mg/ml and PHB concentration of 0.0095 mg/ml. The values of kinetics parameters were μ maks of 0.01292 g/ml. h, Ks of 0.2854 g/ 100ml, YP/X of 0.00143. The accumulation of PHB was optimum at limited phosphate concentration. It could be also concluded that Bulkhoderia cepacia was a non-effective bacteria to produce PHB.
oai:ojs.jurnal.upnyk.ac.id:article/2384
2018-11-14T09:55:10Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2384
2018-11-14T09:55:10Z
Eksergi
Vol 15, No 2 (2018): Vol. 15 No.2 (2018); 34-40
PENGOLAHAN AIR TERPRODUKSI DENGAN MEMBRAN BIOREAKTOR DI WILAYAH PENAMBANGAN WONOCOLO
Nandari, Wibiana Wulan; Chemical Engineering UPN "Veteran" Yogyakarta
Utami, Ayu; UPN "Veteran" Yogyakarta
Yogafanny, Ekha; UPN "Veteran" Yogyakarta
Kristiati, M. Th; UPN "Veteran" Yogyakarta
2018-11-14 09:53:53
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2384
id
ABSTRAK: Masalah pengolahan air terproduksi di wilayah penambangan Wonocolo mulai menjadi perhatian sejak ditetapkannya Wonocolo sebagai Petroleum Geoheritage. Air terproduksi yang ikut terangkut ke permukaan pada saat pengambilan minyak bumi di sumur minyak Wonocolo memiliki tingkat kekeruhan 105 NTU, Total Dissolved Solids (TDS) 1714 mg/L, Total Suspended Solids (TSS) 90 mg/L, dan nilai COD 77,9 mg/L. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh media filtrasi pasir aktif dan karbon aktif sebelum air dimasukkan ke membran bioreaktor. Hasil pengolahan air terproduksi tanpa menggunakan media filtrasi menghasilkan air dengan tingkat kekeruhan 0,33 NTU, COD 35, TSS 8 mg/L dan efisiensi penurunan TDS 90,45 %, sedangkan dengan pasir aktif menghasilkan tingkat kekeruhan 0 NTU, COD 7,1 mg/L; TSS 6 mg/L, dengan efektivitas penurunan TDS 91,85%. Sementara pada media karbon aktif, tingkat kekeruhan 0,27 NTU; COD 10,5 mg/L; TSS 4 mg/L dengan efektivitas penurunan TDS 90,97%. Pengolahan menggunakan media filtrasi menghasilkan air yang memiliki kualitas lebih baik dari pada tanpa filtrasi. Media filtrasi pasir aktif lebih baik daripada karbon aktif. Media filtrasi juga dapat menurunkan beban membran dalam mengolah air.Kata Kunci: Air terproduksi; Membran bioreaktor; pasir aktif; karbon aktif ABSTRACT: The issues of produced water has become very much considered since the stipulation of “Wonocolo” as Petroleum Geoheritage. Produced water transported to the surface during oil extraction at the Wonocolo oil well has a turbidity level of 105 NTU, Total Dissolved Solids (TDS) of 1714 mg / L, Total Suspended Solids (TSS) of 90 mg / L, and COD value of 77.9 mg / L. The purpose of this study was to determine the effect of filtration media (active sand and activated carbon) before water was put into the bioreactor membrane. The results of water treatment without using filtration media produced water with turbidity levels of 0.33 NTU, COD 35 mg/L, TSS 8 mg L and efficiency of TDS reduction of 90.45% while using active sand produced water with turbidity levels of 0 NTU, COD 7.1 mg/L, TSS 6 mg L and efficiency of TDS reduction of 91.85%. For activated carbon, turbidity level was 0.27 NTU, COD 10.5 mg/L, TSS 4 mg L and efficiency of TDS reduction of 90.97%. From the results of the analysis, processing using filtration media produces water that has better quality and active sand filtration media better than activated carbon.Keywords: Produced water; Membrane bioreactor; active sand; activated carbon
oai:ojs.jurnal.upnyk.ac.id:article/8996
2023-09-13T07:40:25Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8996
2023-09-13T07:40:25Z
Eksergi
Vol 20, No 2 (2023); 47-51
Evaluation of Diffusivity Values and Extraction Speed Constants on Black Pepper Piperine Isolation
Mustikaningrum, Mega; Universitas Muhammadiyah Gresik, Jl. Sumatera No.101, Gresik, 61121, Indonesia
Arista, Desty; Universitas Muhammadiyah Gresik, Jl. Sumatera No.101, Gresik, 61121, Indonesia
Nyamiati, Retno Dwi; Program Studi Teknik Kimia, Jurusan Teknik Kimia, Fakultas Teknik Industri, Universitas Pembangunan Nasional Veteran
Yogyakarta, Jl. SWK 104 (Lingkar Utara) Condong Catur, Yogyakarta 55283, Indonesia
Nanda, Dodi Eko; Department of Geographical Environment and Pollution Control, Zhejiang Normal University, China
2023-07-03 10:18:59
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8996
Black pepper; piperine; diffusivity ; soxhlet ; extraction speed constant
en
Piperine is a type of bioactive compound that can be isolated from black pepper. Currently the utilization of piperine is dominated by the health sector. In this study, piperine was isolated using the Soxhlet method. The purpose of this research is to propose a mathematical model to determine the value of the diffusivity (DA) of piperine, the extraction rate constant (k) and the piperine isolation equilibrium constant for commercial designs. Based on the results obtained the value of DA was obtained at 0.1878 m2/minute, the value of k was obtained at 0.0012 m/minute and the value of K was obtained at 0.900. Extraction was carried out using 96% ethanol solvent with a ratio of 25:1 to black pepper samples using the soxhletation method of 5 circulations. The resulting piperine extract was 55.46 mol/liter
oai:ojs.jurnal.upnyk.ac.id:article/7583
2022-08-15T04:33:16Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/40-45
2022-08-15T04:33:16Z
Eksergi
Vol 9, No 1 (2009): Versi Cetak
Distribusi Timbal dalam Udara Akibat Emisi Kendaraan Bermotor Terhadap Penggunaan Lahan di Kawasan Kampus UGM Yogyakarta
Kuncoro, Bambang
Kusumo, Kartiko
2022-08-11 04:03:11
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/40-45
Distribusi Timbal dalam Udara Akibat Emisi Kendaraan Bermotor Terhadap Penggunaan Lahan di Kawasan Kampus UGM Yogyakarta
oai:ojs.jurnal.upnyk.ac.id:article/2993
2022-11-07T10:32:57Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2993
2022-11-07T10:32:57Z
Eksergi
Vol 16, No 2 (2019); 35-41
Application of Cohen-Coon Method for Tuning of pH Controller Parameters in Neutralization Tank, Waste Water Treatment Unit
Suharti, Profiyanti Hermien
Sa'diyah, Khalimatus
2019-11-18 08:12:41
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2993
id
Wastewater generated in industry should be treated, in order to meet the standards set by the Government. pH became important parameters in the process of wastewater treatment. One of waste in industrial synthetic fibers contain ions that make pH of wastewater ranged from 2 to 3. The value of the threshold for the pH of the wastewater, based on regulation of the Minister of environment, ranged from 6 to 9. The main process to achieve this standar was the neutralization process. In order to fulfilment the pH target, pH controller has been used to monitor the pH at neutralization tank. pH controller which is used is a type of PID (proportional, integral, derivative) controller. The PID parameter that used in the controller are proportional gain (Kc) 10, integral time (τi) 1 minutes and 10 second as derivative time (τD). This parameter yields an oscillation response. This research aims to get the optimum PID parameters that can be applied to keep wastewater pH around 7. The experiment results show that the parameters of the PID controller Kc = 0.251, τi = 151 second = 2.51 minutes and τD = 12.5 second, had better performance than the PID controller parameters used previously.
oai:ojs.jurnal.upnyk.ac.id:article/9857
2024-02-19T03:56:25Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9857
2024-02-19T03:56:25Z
Eksergi
Vol 20, No 3 (2023); 162-167
Sintesis Bioetanol dari Rumput Laut Coklat (Sargassum sp) Asal Pulau Timor Sebagai Energi Terbarukan
Bria, Patrisius Maryanto; Program Studi Kimia, Fakultas Pertanian, Sains dan Kesehatan Universitas Timor
Kolo, Sefrinus Maria Dolfi; Program Studi Kimia, Fakultas Pertanian, Sains dan Kesehatan Universitas Timor
2023-11-01 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9857
id
Pasokan bahan bakar minyak (BBM) saat ini masih bergantung pada bahan bakar fosil yang mengakibatkan menipisnya cadangan minyak di perut bumi. Konsumsi energi di sektor transportasi saat ini sebesar 44,2%. Hal ini mengakibatkan meningkatan emisi gas karbon dioksida yang berdampak pada penipisan ozon. Bioetanol merupakan salah satu bahan bakar terbarukan yang dapat menggantikan bahan bakar fosil. Penelitian ini bertujuan untuk mendapatkan kadar gula dan kadar bioetanol yang tinggi. Sargassum sp dinilai ideal untuk dikonversi menjadi bioetanol karena memiliki kandungan karbohidrat 53,28% dan selulosa 23,97-35,22%. Kandungan karbohidrat yang tinggi ini dapat diubah menjadi bioetanol melalui beberapa metode yaitu preparasi, hidrolisis, fermentasi dan distilasi. Preparasi sampel dilakukan dengan tujuan mengurangi ukuran dan memperluas permukaan sampel menggunakan saringan 35 mesh. Hidrolisis dilakukan pada suhu 150 0C selama 50 menit menggunakan katalis H2SO4 2% dengan bantuan microwave. pH yang digunakan dalam proses fermentasi adalah 4,5 dan mikroorganisme yang digunakan yaitu Saccharomyces cerevisiae. Hidrolisat gula dianalisis dengan metode DNS menggunakan spektrofotometer UV-Vis. Uji kualitatif etanol dilakukan secara kimiawi menggunakan kalium dikromat dan uji kuantitatif etanol menggunakan hand refraktometer. Hasil analisis menunjukkan bahwa kadar gula pereduksi adalah 6296,67 ppm. Hasil uji kualitatif etanol dikonfirmasi dari perubahan warna dari orange menjadi hijau kebiruan. Hasil analisis etanol kuantitatif menggunakan refraktometer tangan sebesar 34%.
oai:ojs.jurnal.upnyk.ac.id:article/6479
2022-11-07T10:13:06Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6479
2022-11-07T10:13:06Z
Eksergi
Vol 19, No 1 (2022); 40-45
The Effect of Adding Activated Sludge and Types of Series Circuit Systems Microbial Fuel Cell (MFC) Using Chinese Food Restaurant Wastewater
Jaya, Danang
Widayati, Tunjung Wahyu
Nugroho, Singgih Adi
Ellysa, Firda
2022-04-08 02:55:24
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6479
MFC, active sludge, waste; electricity; environment; renewable energy
en
Electricity consumption expands every year. However, in Indonesia, electricity is still highly dependent on conventional energy sources such as coal. A microbial fuel cell (MFC) is one of the alternative inventions that consists of a series of tools which converts chemical energy into electrical energy in the presence of microbial metabolism. In addition to produce electrical energy, it may also help to solve environmental issues by dealing with waste. This research was purposed to investigate the potency of Chinese food restaurant waste as substrate to generate electricity in microbial fuel cell. The research was done in three stages: wastewater preparation, assembly of MFC tools in various circuits, and running MFC processes. Results showed that the best electrical average (1.02 V) was found in the treatment system without active sludge. The best circuit was in the system in 4 series, which obtained a maximum voltage of 3.76 V and the largest power density of 62.66 mW/m2. In addition, with the addition of active sludge, biological oxygen demand (BOD) of the wastewater could be lowered up to 29.27%, and chemical oxygen demand (COD) up to 51.58%. Total suspended solid (TSS) could be decreased up to 49% on the sample withoud sludge addition.
oai:ojs.jurnal.upnyk.ac.id:article/1698
2017-08-03T15:02:24Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1698
2017-08-03T15:02:24Z
Eksergi
Vol 13, No 2 (2016); 14-19
BIOPELUMAS DARI MINYAK NABATI (REVIEW)
Santi R, Sri Wahyuni
Mahreni, Mahreni; Universitas Pembangunan Nasional "Veteran" Yogyakarta
Reningtyas, Renung; Universitas Pembangunan Nasional "Veteran" Yogyakarta
2016-12-31 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1698
LPPM UPN VY
id
Pertumbuhan otomotif di Indonesia terus mengalami peningkatan. Maka tak heran jika kebutuhan pendukungnya seperti pelumas juga mengalami peningkatan pula. Di Indonesia, kebutuhan akan pelumas atau oli mencapai angka 300 juta liter pertahunnya. Kira kira 40% pelumas akan dibuang ke lingkungan menjadi limbah non biodegradable dan bersifat sebagai limbah B3. Untuk menunjang lingkungan yang mendukung pembangunan berkelanjutan, dunia membutuhkan pelumas biodegradable atau biopelumas. Biopelumas dapat menyamai karakristik dan menggantikan fungsi pelumas berbasis petroleum. Bahan dasar biopelumas pada saat ini adalah minyak nabati melalui serangkaian modifikasi secara kimia dapat diubah menjadi senyawa mono, di atau tri ester. Ester dari minyak nabati menunjukkan sifat sifat fisika dan kimia lebih baik dibandingkan dengan pelumas petroleum. Baik sifat fluida pada temperatur rendah meliputi titik tuang, titik beku dan viskositas. Juga sifat tribologi (keausan) dan stabilitas terhadap oksidator pada temperatur tinggi. Dalam makalah ini dijelaskan mengenai perkembangan terbaru beberapa proses produksi bio pelumas ramah lingkungan berbasis ester sebagai formula generasi baru yang menunjang pembangunan berkelanjutan
oai:ojs.jurnal.upnyk.ac.id:article/7660
2022-11-18T06:48:30Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7660
2022-11-18T06:48:30Z
Eksergi
Vol 19, No 3 (2022); 117-122
Improving Stability of Anthocyanin Extracted from Ipomoea batatas by Co-pigmentation
Evitasari, Rachma Tia; Universitas Ahmad Dahlan
Budiarti, Gita Indah
2022-10-26 00:43:18
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7660
id
Public awareness of the dangers of using synthetic dyes has started to boost the prestige of natural dyes. The limitation of natural dyes is one of the causes of the limited use of natural dyes commercially. This research utilized purple sweet potato (Ipomoea batatas L.) as a source of anthocyanins. The purpose of this study was the stabilization of anthocyanins from purple sweet potato through the co-pigmentation process. The first stage is the extraction of natural anthocyanin dyes from purple sweet potatoes using the microwave-assisted method, then stabilization of anthocyanins through a co-pigmentation process with variations in the addition of arabic gum, Fe-Alginate, and catechins at various concentrations as Total Anthocyanin Content (TAC), and stability test. The higher the concentration value of the co-pigmenting agent added to the extract, the higher the color shift, indicated by a decrease in the TAC value. The best copigmentation was obtained with green tea containing catechin concentration of 0.01 ml green tea/20 ml extract. with a TAC value of 0.1499 mg/L. Stabilization test against storage, co-pigmentation with catechins in green tea gave the best stability. While the stability against heating and oxidation, co-pigmentation with gum arabic will stabilize the condition of anthocyanin extracts.
oai:ojs.jurnal.upnyk.ac.id:article/3718
2022-11-07T10:29:53Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3718
2022-11-07T10:29:53Z
Eksergi
Vol 17, No 2 (2020); 62-67
Identification of The Presence of Water in The Production Fluid Distribution Process in the Offshore Oil Field
Hariyadi, Hariyadi; Department of Petroleum Engineering
Faculty of Mineral Technology
UPN "Veteran" Yogyakarta
Jl. SWK 104 (Lingkar Utara) Condongcatur Sleman DIY
Kristanto, Dedy
Hermawan, Yulius Deddy
2020-12-11 04:52:56
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3718
id
Oil production that flows from the Platform to the FSO (Floating Storage and Offloading) "A" is derived from PT. "B" and the "C" Oil Company in the Madura Strait. The total oil production flowing from the Platform to the "A" FSO is currently around 6000 BOPD. As a result of the delivery system using the same channel, a problem arises, namely oil losses between the Platform as a delivery point and FSO "A" as a receiving point. Besides that, the water that is involved in the oil distribution process will be a deduction factor that will be used as a correction for oil shipments, the more water the less amount of oil will be received at FSO "A". The oil samples that have been taken are then observed for their characteristics, namely density, composition (%-mole), BS&W, emulsion, flash, shrinkage at PPPTMGB "Lemigas" Laboratory Jakarta. The specific gravity of samples is around 1,018. While the characteristics of the two are different from the characteristics of sea water; this difference is shown by the results of SG (1,018 vs 1,025) and the salt content of sea water is much higher than the water formation of PT "B" and PT "C". The oil samples of PT "B" and PT "C" have almost the same SG, which is 0.79. BS&W oil in both ships is quite low; this shows that the separation of oil and water on the Platform went quite well. However, BS&W samples in incoming FSO "A" are very high, at 5%; this indicates an off-set at the water-oil interface level settling time on the Platform separator so that water can be joined with the oil flow from the Platform to the FSO "A"
oai:ojs.jurnal.upnyk.ac.id:article/9974
2024-02-19T03:48:35Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9974
2024-02-19T03:48:35Z
Eksergi
Vol 21, No 1 (2024); 48-54
Efisiensi Thermal Alat Economizer pada Pre-Treatment Section dalam Pengolahan Crude Palm Oil (CPO)
Ariyanto, Eko; Universitas Muhammadiyah Palembang
Alqorni, Muhammad Faris; Program Studi Teknik Kimia, Universitas Muhammadiyah Palembang, Palembang, 30263, Sumatera Selatan, Indonesia
Mardwita, Mardwita; Program Studi Teknik Kimia, Universitas Muhammadiyah Palembang, Palembang, 30263, Sumatera Selatan, Indonesia
2024-01-30 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9974
id
Dalam industri pengolahan CPO, efisiensi energi pada alat economizer menjadi faktor penting dalam meningkatkan efektivitas produksi. Penelitian ini bertujuan untuk mengevaluasi kinerja alat economizer dalam mentransfer energi panas pada aliran fluida Crude Palm Oil (CPO) dan Refined Bleached and Deodorized Palm Oil (RBDPO). Metode penelitian yang dilakukan adalah pengamatan langsung dengan pengukuran suhu dan aliran fluida, dari data tersebut dihitung heat loss dan evaluasi efisiensi termal pada PT XYZ. Hasil penelitian menunjukkan terjadi fluktuasi temperatur pada aliran masuk dan keluar CPO dan RBDPO. Fluktuasi ini dipengaruhi oleh perubahan variabel aliran fluida yang masuk. Aliran massa RBDPO mengalami peningkatan dari 33.659,98 kg/jam menjadi 36.720 kg/jam, sementara aliran CPO tertinggi pada 37.280 kg/jam. Efisiensi termal alat economizer HE-T521A dengan nilai rata-rata sebesar 89,45%. Efisiensi termal tertinggi dicapai pada tanggal 22 Februari 2023, yaitu mencapai 91,09%, sedangkan nilai terendah terjadi pada tanggal 24 Februari 2023, sebesar 88,58%. Meskipun efisiensi termal masih di bawah target desain 94%, alat ini tetap memberikan efisiensi termal yang relatif baik. Hasil penelitian ini dapat digunakan sebagai dasar untuk perbaikan dan pemantauan lebih lanjut guna meningkatkan efisiensi termal alat sesuai dengan desain yang diharapkan.
oai:ojs.jurnal.upnyk.ac.id:article/325
2014-12-07T17:16:00Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/325
2014-12-07T17:16:00Z
Eksergi
Vol 11, No 1; 7-10
Pirolisis Katalitik Tandan Kosong Sawit Menjadi Bio-oil dengan Katalis HZSM-5
Sunarno, Sunarno; Jurusan Teknik Kimia, Fakultas Teknik , Universitas Riau
Kampus Binawidya Km 12,5 Panam Pekanbaru
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/325
ID
One of the alternative new energy sources is biomass. Biomass can be processes to produce bio-oil. The pyrolysis method was used to convert the palm empty fruit bunch from biomass to bio-oil. The purpose of this research are to study the influence of pyrolysis temperature with bio-oil yield and its properties. Pyrolysis process in slurry reactor with 50 grams palm empty fruit bunch, 500 ml thermo-oil and 2% HZSM-5 catalyst. Operating temperature variation (290,300,310 dan 3200 C) have been done. The result show that the optimum temperature obtained at 3200 C with bio-oil yield is 73.6%. The characterization result of bio-oil product are density is 1.008 gr/ml, viscosity is 12.63 cp, flash point 490 C, and maximum of component obtained is acetic acid with 47.09%.
oai:ojs.jurnal.upnyk.ac.id:article/7551
2022-08-15T04:33:34Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7551
2022-08-15T04:33:34Z
Eksergi
Vol 9, No 1 (2008): Versi Cetak; 36-41
KOEFISIEN TRANSFER MASSA PADA PENGAMBILAN MINYAK ATSIRI KAYU MANIS SECARA EKSTRAKSI MENGGUNAKAN PELARUT N-HEKSAN
Widayati, Tunjung Wahyu; UPN "Veteran" Yogyakarta
Setyoningrum, Tutik Muji
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7551
en
Pada proses ekstraksi dìiumpai-peristiwa perpindahan (transfer) massa, dimana perbedaan konsentrasi yørg semakin besar berpengaruh terhadap proses transfer yang semakìn cepat, sehíngga diperoleh koefisien transfer massayang semakìn besar pula. Teknologi mínyak atsiri berkembang sangat pesat, sèhíngga díbutuhkan alat ekstraktor yang efìsíen dan efektif dalam pengoperasiannya.Tuiuan dari penelitian ini adalah untuk mencari hubungan antara kecepatan alíran dan tinggì tumpukan padatan terhadap koefìsien transfer massa pada ekstraksí padat-caír dalam kolom fixed-bed. Penelitian ini menggunakan serbuk dengan ukuran -/,8 + i0 mesh dari daun dan ranting køyu mønis dengur tinggì tumpukan tertentu yang dimasukan ke dalam kolom fixed-bed menggunakan-Heksan yang d¡alirkan kedalam kolom dengan kecepatan alír tertentu. Ukuran butiran kayu manis yang digunakan adaiah 18+30 mesh.Kecepatan aliran n-Heksana yang digunakan adalah 2,3829 cm/detik; 2,9197 cm/detik; 3,9932 cm/detik; 4,3957cm/detik; 4,798 cm/detik. Tinggi tumpukan padatan yang digunakan adalah 5 cm, 6 cm, 7 cm, I cm, g cm, I0 cm.
oai:ojs.jurnal.upnyk.ac.id:article/2236
2022-03-29T08:14:16Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2236
2022-03-29T08:14:16Z
Eksergi
Vol 15, No 1 (2018): Vol 15, No 1 (2018); 9-15
Effect of Clay Content in Sulfonated Poly-Ether–Ether Ketone (sPEEK) on Methanol Permeability via Direct Methanol Fuel Cell Membrane
http://jurnal.upnyk.ac.id/index.php/eksergi/article/download/2236/5492
Hakim, Arief Rahman; Chemical Engineering Department, Diponegoro University
2018-07-04 07:42:50
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2236
DMFC; Nafion; Komposit; PEEK; Clay; Filler; Karakteristik
ia
Direct Methanol Fuel Cell (DMFC) adalah sel pembangkit listrik yang menggunakan membran elektrolit sebagai sarana transportasi hidrogen/proton. Membran yang banyak digunakan adalah Nafion. Akan tetapi NafionÒmemiliki masalah metanol crossover, tidak tahan terhadap suhu tinggi dan harganya mahal. Pada penelitian ini difokuskan pada pembuatan membran pengganti Nafion untuk aplikasi DMFC. Membran yang digunakan untuk DMFC adalah dari jenis PEEK. Membran PEEK telah dimodifikasi dengan menggunakan proses sulfonasi pada suhu 60oC selama 3 jam dan ditambahkan clay sebagai filler dalam pelarut n-methyl-2-pyrrolidone (NMP). Karakteristik membran dapat dilihat dari morfologi membran, struktur membran, permeabilitas metanol, konduktivitas proton. Hasil penelitian menunjukan dengan sulfonasi 60oC selama 3 jam dianggap sebagai kondisi optimum pada penelitian sebelumnya, dengan penambahan clay 1%, 3%, 5% wt, penambahan sebanyak 1% dianggap sebagai penambahan optimum, menghasilkan konduktifitas 2.02E-03 S/cm, swelling 51.85% (air) 52.74% (metanol), permeabilitas 1,2E-05 cm2/s (refraktometer)1.5E-05 cm2/s (kurva kalibrasi), pengujian dan perhitungan permeabilitas dengan menggunakan 2 cara, yaitu refraktometer dan kurva kalibrasi hasilnya tidak jauh berbeda, sehingga kedua cara tersebut dapat digunakan, sehingga komposit sPEEK-Clay dengan penambahan 1% Clay yang optimum dapat digunakan untuk membrane pada DMFC. Keywords:
oai:ojs.jurnal.upnyk.ac.id:article/9367
2023-07-14T03:54:14Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9367
2023-07-14T03:54:14Z
Eksergi
Vol 20, No 2 (2023); 112-117
Effect of Differences in Type and Concentration of Nitrogen Sources (NaNO3 and Urea) on Spirulina platensis Biomass Production
Syaichurrozi, Iqbal; Chemical Engineering Department, UNTIRTA Cilegon, (Scopus ID: 55881609100)
Toron, Yustinus Selis
Dwicahyanto, Sharfan
Wardalia, Wardalia
2023-07-03 10:18:59
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9367
medium of cultivation; NaNO3; protein; Spirulina platensis; urea
id
The goal of this study was to investigate the effect of the concentration and the type of nitrogen sources in the cultivation medium on the production of biomass and biochemical content (carbohydrates, proteins, fats) in the Spirulina platensis biomass. Types of nitrogen sources included NaNO3 and urea, where the concentrations were varied from 0.5 to 3.5 g/L. The results showed that the use of urea tended to produce more S. platensis biomass than the use of NaNO3. The best concentrations that produced the highest biomass were NaNO3 2.5 g/L (biomass 0.6745 g/L) and urea 0.5 g/L (biomass 0.7158 g/L). The use of urea also tended to produce a higher specific growth rate and a shorter doubling time than the use of NaNO3. The high concentration of nitrogen sources caused the pH of the medium to increase more rapidly due to the accumulation of ammonium in the medium. Using NaNO3 can produce biomass with a higher protein content (28.34-36.98%) than using urea (25.86-33.52%).
oai:ojs.jurnal.upnyk.ac.id:article/5362
2023-01-15T05:33:08Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5362
2023-01-15T05:33:08Z
Eksergi
Vol 18, No 2 (2021); 43-48
Kinetic Study on Coagulation Process with Poly Aluminium Chloride and Alum Coagulants in Treating The Liquid Waste of Tempeh Industry
Syaichurrozi, Iqbal; Chemical Engineering UNTIRTA CIlegon
2021-11-01 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5362
COD; Koagulasi; Model Kinetik; Poly Aluminium Chloride; Tawas
en
Several factors that influence the coagulation process in reducing chemical oxygen demand (COD) in wastewater are processing time, coagulant dose and type of coagulant. The effect of these three factors on the reduction of COD in tempeh industrial wastewater during the coagulation process has been investigated by Hidayah (2018). However, kinetic studies in depth have not been done by Hidayah (2018). Therefore, the aim of this study was to develop a new kinetic model that can predict the performance of the coagulation process. It is hoped that the kinetic model can be used in a wider range of operating conditions. In this study, the pseudo first order and pseudo second order kinetic models were tested to get the best model. Based on simulation results, both models produced almost the same accuracy. For reason of simplification, the pseudo first order model was chosen as the basic model in this study. Furthermore, modifications were made to the pseudo first order model so that the effect of processing time, coagulant dose and type of coagulant appeared in the model. This kinetic model was successfully tested to predict the coagulation performance of study of Hidayah (2018) with an average Mean Absolute Percentage Error (MAPE) of 10.8%.
oai:ojs.jurnal.upnyk.ac.id:article/375
2016-04-29T04:28:42Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/375
2016-04-29T04:28:42Z
Eksergi
Vol 11, No 2; 30-34
Evaluation of C/N Ratio in Spirulina platensis Cultivation using Molasses Addition as Organic Carbon Source
Setyoningrum, Tutik Muji; Program Studi Teknik Kimia, Universitas Pembangunan Nasional "Veteran" Yogyakarta
A.W., Viska; Program Studi Teknik Kimia, Universitas Pembangunan Nasional "Veteran" Yogyakarta
A, Annisaturraihan; Program Studi Teknik Kimia, Universitas Pembangunan Nasional "Veteran" Yogyakarta
Putra, N Islamy; Program Studi Teknik Kimia, Universitas Pembangunan Nasional "Veteran" Yogyakarta
Azimatun Nur, Muhamad Maulana; Program Studi Teknik Kimia, Universitas Pembangunan Nasional "Veteran" Yogyakarta
2014-12-28 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/375
CV Neoalgae Technology
en; id
Growth of Spirulina platensis requiers nitrogen, phosphate, and carbon. Urea is used as source of nitrogen, TSP as source of phosphate, and sodium bicarbonate (NaHCO3) as source of carbon. The purpose of this research was to evaluate C:N ratio of medium using different concentration of molase and urea addition as replacement of commercial medium. Spirulina platensis was cultivated as a control consist of 1500 ppm NaHCO3 as source of carbon, 80 ppm urea as source oh nitrogen, 20 ppm TSP (Triple Super Phosphate) as source of phosphate, 1 ppm FeCl3 and 50 µg/l B12 vitamin as source of micronutrients. Spirulina platensis was cultivated in 2-liter of erlenmeyer flask with variation composition of urea and molasses in growth media by adding 20% (w/w) control medium. Urea was varied between 0; 16; and 80 mg L-1, molasses was varied at the level of 0,1-0,9 g L-1. Cultivation was maintained in pH 9-10, light intensity 6000-7000 lux and 280C. Mini aerator pump is used as a medium stirrer. The best result were obtained at the medium varied of 0,1 g L-1 and 16 ppm of urea with growth rate of 0.230 day-1 , C:N ratio 6.8, and dry biomass of 0.333 g L-1.
oai:ojs.jurnal.upnyk.ac.id:article/2695
2022-11-07T10:31:11Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2695
2022-11-07T10:31:11Z
Eksergi
Vol 16, No 1 (2019); 7-12
Environmental Impacts Evaluation of Sorbitol Production from Glucose
Akmalina, Rifkah; Universitas Pamulang
2019-07-23 08:24:29
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2695
en
A life cycle assessment (LCA) has been performed on sorbitol production from glucose, which aims to quantify and evaluate the environmental impacts that produced from the process. SuperPro Designer software was employed to perform the process simulation, while SimaPro was used to quantify the LCA.Potency of global warming, acidification, eutrophication, photochemical oxidants creation, abiotic depletion, and ozone layer depletion were evaluated. A gate-to-gate LCA study of sorbitol production showed that global warming potential (GWP) had the largest impact to environment with the value of 3.551 kg CO2 eq/kg sorbitol. Glucose and electricity consumption were known as two major contributors to GWP, and hydrogen reactor was the main consumer of electricity. The use of glucose were responsible for more than 50% of total environmentalimpact in each category. Performing heat integration in sorbitol processing is highly recommended for gate-togate system to reduce energy demand, thus decreasing the environmental impacts. Therefore, this LCA study may be applied to perform a sustainable improvement on sorbitol production process.Keywords: sorbitol; life cycle assessment; global warming potential
oai:ojs.jurnal.upnyk.ac.id:article/10003
2023-09-13T07:39:59Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10003
2023-09-13T07:39:59Z
Eksergi
Vol 20, No 2 (2023); 42-46
Edible Oil as Carotenoids Extraction Solvent from Pumpkin (Cucurbita moschata) Peel
Perwitasari, Perwitasari; Univeritas Pembangunan Nasional "Veteran" Yogyakarta
Anggorowati, Heni
Nugraheni, Susanti Rina
Lestari, Indriana
2023-07-03 10:18:58
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10003
id
Carotenoids are pigments found in various types of fruits and vegetables that provide yellow, orange, and red colors. This study aimed to extract yellow pumpkin skin using edible oil solvents. The extraction process was carried out using ultrasound-assisted extraction (UAE) method with virgin coconut oil (VCO) and palm kernel oil (PKO). Yellow pumpkin peel powder with sizes of 40 mesh and 100 mesh were extracted with variations in extraction time (30 minutes, 60 minutes, and 90 minutes) and variations in solid-to-solvent ratio (1:10, 1:20, 1:30, 1:40, and 1:50). UV-Vis spectrophotometer analysis was used to determine the concentration of the extraction results. According to the research results, the best carotenoid concentration of 2513.44 ppm was obtained using PKO solvent with a powder size of 100 mesh, extraction time of 30 minutes, and powder-to-solvent ratio of 1:10.
oai:ojs.jurnal.upnyk.ac.id:article/6387
2022-11-07T10:13:06Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6387
2022-11-07T10:13:06Z
Eksergi
Vol 19, No 1 (2022); 10-14
Influence of dietyl ether on the mixture of biodiesel B50
Jaya, Danang
Litaay, Rico Mitchell
Bagus, Ryan Ade; Universitas Pembangunan Nasional Veteran Yogyakarta
Widayati, T.W.
Syahri, Muhammad
2022-04-05 13:18:28
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6387
id
Biodiesel is generally defined as monoalkyl esters of plant oils and animal fats. Oils derived from plants and animal fats and their derivatives have the possibility as a substitute for diesel fuel. This biodiesel is then mixed with diesel with a composition of 50% biodiesel and 50% diesel to make B50. In this study, B50 was then mixed with diethyl ether. The results of this study, obtained a mixture of B50+0% diethyl ether, B50+2% diethyl ether, B50+4% diethyl ether, B50+6% diethyl ether, B50+8% diethyl ether, B50+10% diethyl ether with kinematic viscosity (6.5 mm2/s, 6 mm2/s, 5.4 mm2/s, 5 mm2/s, 4.3 mm2/s, and 3.6 mm2/s), flash point (183 oC, 179 oC, 177 oC, 175 oC, 171 oC, and 167 oC), pour point (7 oC, 6 oC, 5 oC, 4 oC, 2 oC, and 1 oC), caloric value (10051,66 cal/m3, 10097,1322 cal/gram, 10128,13 cal/gram, 10170,38 cal/gram, 10235,37 cal/gram, and 10306,84 cal/gram), and density 15 oC (841.1 Kg/m3, 839.5 Kg/m3, 838.2 Kg/m3, 837 Kg/m3, 836.2 Kg/m3, dan 835.1 Kg/m3)
oai:ojs.jurnal.upnyk.ac.id:article/1434
2016-06-16T13:01:37Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1434
2016-06-16T13:01:37Z
Eksergi
Vol 13, No 1 (2016); 7-12
Kinetika Reaksi Isomerisasi α-pinene
Ringgani, Retno; UPN Yogyakarta
Budhijanto, Budhijanto
Budiman, Arief
2016-06-01 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1434
id
Terpentin merupakan hasil hutan non kayu yang berasal dari pohon pinus. Terpentin diperoleh dari hasil produk non kayu berupa getah pinus dengan kandungan tertinggi berupa α-pinene dengan cara didistilasi dan menghasilkan produk atas berupa terpentin dan produk bawah berupa gondorukem. Terpentin yang dipakai pada penelitian ini memiliki komposisi α-pinen 80,03 %, camphen 1,95%, β-pinen 2,78 %, ∆-caren 11,91% dan limonen 1,99%. Reaksi isomerisasi α-pinen merupakan reaksi paralel yang menghasilkan beberapa produk isomer, yaitu camphen, limonen,α-terpinen, γ-terpinen, dan terpinolen. Produk hasil isomerisasi α-pinen merupakan produk intermediate yang digunakan dalam industri farmasi, chemical fragrance, anti bakteri dan industri parfum. Pada penelitian ini, dipelajari reaksi isomerisasi α-pinen menggunakan katalis resin amberlyst 36. Reaksi isomerisasi α-pinen dilakukan pada reaktor batch berpengaduk dengan variasi suhu 70 - 1000C. Kinetika reaksi isomerisasi α-pinen dari terpentin didekati dengan reaksi order satu irreversible. Model kinetika yang diusulkan menunjukkan kesesuaian dengan hasil eksperimen baik. Dari hasil perhitungan diperoleh parameter faktor tumbukan (A) dan Energi Aktivasi (E) untuk masing-masing camphene, limonene, α-terpinene, γ-terpinene, terpinolene yaitu 0,825x105 dm.s-1; 0,0061x105 dm.s-1;0,0645x105 dm.s-1;0,0595x105 dm.s-1; 0,0645x105 dm.s-1 dan 27,93 kJ/mol; 19,67 kJ/mol; 18,53 kJ/mol; 19,25 kJ/mol; 4,28 kJ/mol.
oai:ojs.jurnal.upnyk.ac.id:article/7615
2022-08-15T04:32:42Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7615
2022-08-15T04:32:42Z
Eksergi
Vol 10, No 1 (2010): Versi Cetak; 40-43
PENURUNAN BOD DAN COD PADA LIMBAH CAIR INDUSTRI SABLON
Retno, Dyah Tri
2022-08-15 02:24:14
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7615
Limbah cair industri sablon merupakan salah satu pencemar lingkungan yang perlu mendapat perhatian khusus. Limbah cair tersebut jika berada dalam badan air akan menyebabkan matinya biota airyang berguna dan mikoorganisme hidup lainnya, Penelitian ini bertujuan untuk mengetahui sejauh mana kandungan pencemar limbah tersebut dapat diturunkan dengan cara penambahan koagulan tawas sehinggadiharapkan aman dibuang dibadan sungai. Metode pengolahan limbah dalam penelitian ini adalah metode Kimia Fisika yaitu dengan penambahan koagulan dilanjutkan dengan pengadukan ( koagulasi - flokulasi) dan penyaringan. Variabel dalam penelitian ini adalah waktu pengadukan, perbandingan jumlali lirnbah dengan tawas, kecepatan pengadukan. Yang diamati dalam penelitian adalah BOD dan COD. Hasil penelitian ini menunjukkan bahwa kondisi optimum yang diperoleh dari pengolahan limbah sablon dengan 1000 ml untuk tawas adalah waktu pengadukan 3 menit, perbandingan jumlah limbah dengan tawas yaitu 25 ml (untuk BOD) dan 30 ml ( untuk COD ) dengan kecepatan pengadukan optimum 100 rpm.
oai:ojs.jurnal.upnyk.ac.id:article/3080
2022-11-07T10:30:19Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3080
2022-11-07T10:30:19Z
Eksergi
Vol 17, No 1 (2020); 1-6
Design of a Simple Pyrolysis Reactor for Plastic Waste Conversion into Liquid Fuel using Biomass as Heating Source
Kurniawan, Aditya; UPN "Veteran" Yogyakarta
Sugiarto, Bambang; UPN "Veteran" Yogyakarta
Perdana, Andri; UPN "Veteran" Yogyakarta
2020-04-03 08:28:15
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3080
plastic pyrolysis; liquid fuel; biomass combustion; reactor design
LPPM UPN "Veteran" Yogyakarta
en
A design that emphasizes simplicity and cost-effectiveness is applied to the plastic pyrolysis reaction system to produce liquid fuel. The reactor is fabricated from the waste refrigerant tank. The energy source for pyrolysis is generated by the combustion of biomass pellets. Forced convection by an electric blower is utilized to enhance the combustion efficiency and thus increase the heating rate with the overall average temperature at 412 °C. The coiled pipe is employed as a condenser system with water as its cooling media. The quantity of liquid product is measured for a different mass of PET-type plastic waste feed, with a maximum value of 17.7% w/w of feed mass is obtained. The physical characteristic of the liquid product is then analyzed using standard methods. It is found that its characteristics have approached the specification of commercial liquid fuel in the domestic market, with a liquid specific gravity of 0.776 and a heating value of 46 MJ/kg.
oai:ojs.jurnal.upnyk.ac.id:article/10949
2024-02-19T03:48:35Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10949
2024-02-19T03:48:35Z
Eksergi
Vol 21, No 1 (2024); 17-23
Karakterisasi Edible Film dari Pektin Kulit Durian, Pati Singkong, dan Gliserol
istiani, Alit; Universitas Pembangunan Nasional Veteran Yogyakarta
Wardani, Nina Anggita; Universitas Pembangunan Nasional Veteran Yogyakarta
Kafiya, Maftuh; Universitas Pembangunan Nasional Veteran Yogyakarta
Hanifah, Nada Alya; Universitas Pembangunan Nasional Veteran Yogyakarta
Nukhia, Zulfatun; Universitas Pembangunan Nasional Veteran Yogyakarta
2023-12-05 04:19:29
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10949
id
Kulit durian merupakan biomassa yang mempunyai potensial sebagai sumber pektin. Salah satu pemanfaatan pektin adalah digunakan dalam pembuatan edible film yang merupakan lapisan tipis dan memiliki fungsi sebagai pengemas atau pelapis makanan, sertadapat dimakan sekaligus dengan produk yang dikemasnya. Untuk memanfaatkan kulit durian tersebut dalam penelitian ini dibuat edible film dengan bahan pati singkong, gliserol dan pektin kulit durian. Pengaruh konsentrasi pektin dan pengaruh konsentrasi gliserol terhadap karakteristik edible film yang dihasilkan akan dikaji dengan melihat ketebalan, uji kuat tarik, persen elongasi, dan daya serap air nya. Hasil menunjukkan bahwa pada variasi perbandingan massa pektin diperoleh bahwa peningkatan konsentrasi pektin dapat menambah kuat tarik dan elongasi edible film, namun peningkatan konsentrasi pektin tersebut tidak berpengaruh signifikan terhadap ketebalan dan daya serap edible film. Adapun pada variasi perbandingan massa gliserol diperoleh bahwa peningkatan konsentrasi gliserol dapat meningkatkan persen elongasi, kuat tarik, dan daya serap air edible film. Namun penambahan gliserol yang berlebih akan mengurangi nilai kuat tarik dan daya serap air edible film. Pada variasi penambahan pektin didapatkan hasil karakteristik yang terbaik adalah pada perbandingan massa pati:gliserol:pektin 3:1:1,25 dengan nilai ketebalan edible film sebesar 0,112 mm, nilai kuat tarik sebesar 9,32 N, dan nilai persen elongasi sebesar 79,59%.
oai:ojs.jurnal.upnyk.ac.id:article/318
2016-01-05T01:27:20Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/318
2016-01-05T01:27:20Z
Eksergi
Vol 11, No 1; 57-61
Pre-treatment Process of Biodiesel Production From Waste Cooking Oil
Restu Dewati, Putri; Prodi Teknik Kimia UPN Veteran Yogyakarta
Purbohandono, Achmad Halim
Budiman, Arief
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/318
Id
Methyl ester of fatty acids known as biodiesel, synthesized from vegetable oils or animal fats, is a promising alternative fuel due to the limited resource of fossil fuel and the environment concern. There are large amount of low cost oil such as waste cooking oil that could be converted to biodiesel. However there is problem related to process of this low cost oil since they often contain large amounts of free fatty acid (FFA) that cannot be converted to biodiesel using alkalin ecatalyst. In this paper, a technique for reducing the FFA as pre-treatment in biodiesel production from waste cooking oil is studied. This pre-treatment step is aimed to esterify the FFA before trans-esterifying process of triglycerides with an alkaline-catalyst to complete the reaction. The main parameters of this process such as temperature, the molar ratio of methanol to acid catalyst, and catalyst loading were investigated to determine the optimum condition for converting of the FFA to usable esters. The result shows that the best condition for reducing of FFA was obtained at 65o C, with a molar ratio of oil to methanol of 1:6, and catalyst loading of 2 wt% H2SO4 .
oai:ojs.jurnal.upnyk.ac.id:article/7546
2022-08-15T04:33:34Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7546
2022-08-15T04:33:34Z
Eksergi
Vol 9, No 1 (2008): Versi Cetak; 16-21
Model Matematika dan Simulasi Untuk Non-Idealitas Reaktor Alir Pipa
Gunarto, Gunarto
2022-08-09 03:27:41
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7546
en
This paper presents a mathematical model for the performance of a non-ìdeality plugflow reactor. An analytical technique used was the residence time distribution (RTD) involving tracer component. This model can give a prediction of the number of the ideal continuous stirred tank reactors that could represent the non-ideal plug flow reactor. Regardíng to the literature, the result obtained is 9 continuous stirred tank reactors in series would represent the performance of non-ideal plugflow reactor that was analyzed
oai:ojs.jurnal.upnyk.ac.id:article/2140
2018-01-01T18:47:11Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2140
2018-01-01T18:47:11Z
Eksergi
Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 35-39
Dewatering Batubara Jorong, Kalimantan Selatan Dengan Menggunakan Minyak Goreng Bekas Dan Minyak Tanah
Jaya, Danang
2017-12-31 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2140
id
Potensi sumber daya batubara di Indonesia sangat melimpah. Namun, cadangan batubara tersebut pada umumnya termasuk batubara peringkat rendah dengan kadar air yang tinggi. Untuk mengatasi kadar air, salah satu teknologi yang telah dikembangkan saat ini ialah slurry dewatering yaitu pemanasan dengan menambahkan zat aditif berupa minyak residu. Proses slurry dewatering dilakukan dengan mencampurkan batubara ukuran 35 mesh seberat 100 gr ke dalam minyak goreng bekas, dan minyak tanah pada perbandingan berat sebesar 1 : 1 : 1 , 1 : 1 : 0,5 ,dan 1 : 0,5 : 0,5. Campuran dipanaskan pada suhu 120oC, 130oC, 140oC, 150oC, dan 160oC. Selanjutnya dilakukan pengadukan dengan kecepatan putaran 500 rpm dengan waktu 1,5 jam. Hasil slurry setelah proses dimasukan ke dalam centrifuge untuk memisahkan cairan dengan padatannya. Kemudian setelah didapatkan hasil optimal dilakukan percobaan kembali pada suhu 170oC dan 180oC. Hasil penelitian paling optimum didapatkan pada perbandingan 1 : 1 : 1 dan suhu operasi 160oC. Hasil analisa awal kadar air batubara sebesar 13,09 % dan nilai kalor sebesar 5554,36 kal/g lalu diperoleh hasil analisis akhir penelitian kadar air batubara sebesar 0,61 % dengan nilai kalor 7391,09 kal/gr. Data menunjukan penurunan kadar air batubara Jorong, Kalimantan Selatan mecapai 95,34% dan kenaikan nilai kalori sebesar 24,85%.
oai:ojs.jurnal.upnyk.ac.id:article/8166
2023-04-10T03:14:43Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8166
2023-04-10T03:14:43Z
Eksergi
Vol 20, No 1 (2023); 21-28
Simulation of A Solar Drier for Iroko Wood (Chlorophora Excelsa) in A Tropical Environment
http://jurnal.upnyk.ac.id/index.php/eksergi/article/download/8166/22550
Kristianto, Fesa Putra
Salim, Mercusuar Kemall Gibran; Politeknik Industri Furnitur dan Pengolahan Kayu
2023-03-02 03:28:05
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8166
Politeknik Industri Furnitur dan Pengolahan Kayu
id
In a previous study conducted by Simo Tagne to designing a solar dryer based on mathematical equations for iroko wood in Cameroon, Africa. However, there is no complete simulation of the drying process on the tool, resulting in the lack of detailed elaboration of the iroko wood drying process. The purpose of this study is to simulate in detail the drying process on the tool using an ANSYS simulation. The model used in this simulation still uses the same mathematical model that has been studied before. This research begins by setting up the ANSYS application with the previous mathematical model, environmental conditions, and tool specifications. Furthermore, simulations are carried out using the ANSYS application with measurements of pressure, temperature, velocity and mass transfer. From this simulation obtained results for the distribution of pressure, temperature, velocity, and mass transfer. From all these distributions, it is sufficient to describe the drying process of the tool according to the mathematical model that has been studied previously.
oai:ojs.jurnal.upnyk.ac.id:article/4534
2022-11-07T10:15:39Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4534
2022-11-07T10:15:39Z
Eksergi
Vol 18, No 1 (2021); 18-23
Inventory of Greenhouse Gas Emissions in the Waste Sector with First Order Decay in Karangasem Regency
Fauziawan, Affan Irfan
2021-05-03 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4534
id
Waste production increases with the increase in population, urbanization rate and people's income. Garbage is a contributor to greenhouse gas (GHG) emissions which can cause global warming. The Indonesian government is still committed to reducing greenhouse gas emissions and working to reduce / limit the increase in temperature below 1.50C. Karangasem Regency, is on the island of Bali, with a population in 2018 of 414,800 people. The population is spread across 8 sub-districts with the population growth rate in Karangasem averaging 0.88% per year. The distribution of the population will be directly proportional to the distribution of solid waste produced. It is important to do an inventory of GHG emissions to determine the amount of emissions in Karangasem Regency. The method for calculating municipal solid waste will be carried out using the First Order Decay method contained in the IPCC (Intergovernmental Panel on Climate Change) Guidelines. From the calculation results, GHG emissions have been obtained in each sub-district in Karangasem Regency. Total GHG emissions in 2019 amounted to 11,764 tons CO2-e, with the highest GHG emission contributor, namely Karangasem District with 2,302 tons CO2-e and the lowest being Sidemen District with 894 tons CO2-e. With this research, it is hoped that stakeholders will be able to make efforts (mitigation) that can reduce these GHG emissions.
oai:ojs.jurnal.upnyk.ac.id:article/338
2022-08-15T04:32:21Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/338
2022-08-15T04:32:21Z
Eksergi
Vol 10, No 2 (2010): Versi Cetak; 36-41
Preparasi Membran Selulosa Asetat untuk Penyaringan Nira Tebu
Murni, Sri Wahy; Prodi Teknik Kimia FTI UPN “Veteran” Yogyakarta
Jl. SWK 104 (Lingkar Utara), Condong Catur, Yogyakarta – 55283
Telp/Fax: +62274-486889,
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/338
In the current the sugar cane process, the liquid sugar cane is purified by physical and chemical processes that need much energy and produce waste. Membrane process separation is alternative way for purifying it. In this research, membrane was prepared from cellulose acetate by phase inversion method with acetone as a solvent and formamide as additive. The experiment was conducted by varying cellulose acetate concentration and evaporation period. Cellulose aseatat, acetone and formamide with a particular composition is stirred for 3-4 hours until homogeneous. Mixture is then filled into the bottle and closed tightly and left for 1 day. Furthermore, the mold is poured on flat glass and evaporated during the allotted time. Matter and its lining membrane is inserted in a tub filled with water at a temperature 2oC for 5 minutes, the membrane was then dried.. Performance of membrane produced was tested determination by liquid sugar cane. The result of the experiment showed that the best weight ratio of cellulose acetate:acetone:formamide was and evaporation period were 12.5:5.2:3.5 and 45 second respectively; the membrane produced have volumetric flux, rejection of TSS and permeation of sucrose were 6.1698 l/m2.hour, 91.12% and 89% respectively.
oai:ojs.jurnal.upnyk.ac.id:article/7578
2022-08-15T04:33:16Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/11-15
2022-08-15T04:33:16Z
Eksergi
Vol 9, No 1 (2009): Versi Cetak
Pembuatan Genteng dari Lumpur Lapindo dan Lempung Pundong dengan Variasi Komposisi
Subagyo, Purwo
Nuri, Wasir
2022-08-11 04:03:09
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/11-15
en
Pembuatan Genteng dari Lumpur Lapindo dan Lempung Pundong dengan Variasi Komposisi
oai:ojs.jurnal.upnyk.ac.id:article/4563
2023-01-15T05:33:08Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4563
2023-01-15T05:33:08Z
Eksergi
Vol 18, No 2 (2021); 77-81
Influence of solvents to Distillation Extraction in Separating of Methanol- Acetone Mixture using Separating Wall
Raytama, Reynardi Risyad; Parahyangan Catholic University
Santoso, Herry
Hartanto, Yansen
2021-11-01 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4563
en
Methylene blue is one of dying waste that causes harmful effect both enviromental and public health risks. A method to overcome the problem is to adsorb it with the activated carbon. Apart from that, corn cob is potential biomass with can convert to activated carbon. The aim of this research is to syntethic and to modify corn cob activated carbon with iron oxide. It is expected to increase the afinity of methylene blue to the activated carbon surface. The modification is done by wet impregnation and the effectiveness of the impregnated corn cob activated carbon is studied by analyse the persen removal of methylene blue in every interval time. The result show that in the concentration range of Fe load impregnation between 1%-3% which has been used, the corn cob activated carbon with concentration of Fe load 2% has the most optimum ability in methylene blue adsorption with the adsorption capacity 44,9%. Moreover, the effect pH shows that in acidic condition the adsorption of methylen blue is better than in netral condition
oai:ojs.jurnal.upnyk.ac.id:article/1034
2015-07-14T00:24:20Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1034
2015-07-14T00:24:20Z
Eksergi
Vol 12, No 1 (2015); 01-04
Production, Characterisation, and Isolation of Lipase from Aspergillus niger by using Palm Oil as Inducer
Murni, Sri Wahyu
Kholisoh, Siti Diyar
D.L., Tanti
E.M., Petrissia
2015-07-09 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1034
Aspergillus niger; enzyme activity; lipase; palm oil
En
The objective of the research was to produce, isolate and characterise lipase from Aspergillus niger, and therefore inducted it by using palm oil. The lipase enzyme was produced through a batch fermentation process in a 1.4 liters-fermentor. Fermentation was carried out at room temperature, initial pH of 7, the stirring speed of 250 rpm, aeration rate of 1 vvm, and inducer concentration of 3%-m/v palm oil/ml. Enzymes was characterised at several temperature and pH variations. The lipase showed the optimum performance at pH of 7 and temperature of 30 °C with the activity of 1.5 U / ml. Isolation of lipase yielded a 4-times-increase in its activity by using 90% ammonium sulfate.
oai:ojs.jurnal.upnyk.ac.id:article/3291
2022-11-07T10:30:19Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3291
2022-11-07T10:30:19Z
Eksergi
Vol 17, No 1 (2020); 28-32
Reduction Nitrite Value in Water Using Activated Charcoal Moringa Seeds
http://jurnal.upnyk.ac.id/index.php/eksergi/article/download/3291/7548
Mukaromah, Ana Hidayati; UNIVERSITAS MUHAMMADIYAH SEMARANG
Abja, Rusda
Wardoyo, Fandhi Adi
2020-04-03 08:28:15
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3291
id
Nitrite (NO2 - ) is a compound that can distrupting oxyhaemoglobin process and causes body weakness, fatigue, and samnolen. Either to reduce nitrite value in the water is to use activated charcoal moringa seeds, because it countains 4-alfa-L-rhamnosyloxy-benzilisothiocyanate substances. This research aims to find out influence of activated charcoal concentrate and immersion time variant to the reduction of nitrites ion in the water. Research object was nitrite ion in 10 ppm concentrate, the immersion with activated charcoal moringa seeds with concentrate variant 9 ; 12 ; and 15%w/v, with 10 ; 20 ; and 30 minutes immersion time. Nitrite assay performed with specfotometry methods with griess reagent. From the research results, optimum wave length is 540 nm and time stability of initial nitrite value 10 minutes with initial 4,7794 ppm. Reduction lowest nitrite value in the water is 9%w/v concentrate in 10 minutes time, with the result 3,1816 ppm and highest nitrite value is 15%w/v concentrate (1,1862 ppm). So that, can be conclude there is reaction activated charcoal moringa seeds variant concentration and immersion time to reducting nitrite ions in the water.
oai:ojs.jurnal.upnyk.ac.id:article/10699
2024-02-19T03:56:25Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10699
2024-02-19T03:56:25Z
Eksergi
Vol 20, No 3 (2023); 195-199
Pemanfaatan Nanokitosan Sebagai Coating Agent dalam Pembuatan Pupuk NPK Berbasis Control Release Fertilizer
Sastra, Richad Ade; Unair
Adiarto, Totok; Unair
Prasetyo, Antonius Budi
Darmokoesoemo, Handoko; Unair
Putri, Devi Indrasari Mustopa; Unair
2023-11-01 04:45:29
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10699
id
Kitosan merupakan biopolimer yang terdiri atas monomer glukosamin serta memiliki potensi sangat besar untuk dikembangkan sebagai biomaterial. Berdasarkan karakternya, kitosan larut dalam asam lemah dan tidak larut dalam air. Pada penelitian ini, kitosan dimodifikasi menjadi ukuran nano (nanokitosan) untuk meningkatkan kapabilitasnya sebagai membran dan digunakan sebagai coating agent dalam pembuatan pupuk NPK yang berbasis Control Release Fertilizer. Sintesis nanokitosan dilakukan dengan metode gelasi ionik dengan memberikan variasi pada lama pengadukan dan konsentrasi crosslinker. Variasi lama waktu pengadukan yang diberikan adalah 5 menit, 10 menit, dan 15 menit. Crosslinker yang digunakan dalam penelitian ini adalah Sodium Tripolyphosphate (STPP) dengan variasi konsentrasi 0,2%; 0,25%; 0,3%. Dari hasil uji release yang dilakukan, didapatkan nanokitosan dengan variasi lama pengadukan 15 menit dengan konsentrasi STPP 0,3% sebagai variasi yang paling optimal dengan release paling kecil. Melalui karakterisasi PSA, didapatkan ukuran nanokitosan tersebut sebesar 202,1 nm, dengan bentuk morfologi yang berbentuk bulatan teraglomerasi pada hasil SEM. Karakterisasi XRD yang didapatkan menunjukkan bahwa partikel bersifat amorf. Sedangkan pada hasil FTIR, didapatkan perbedaan vibrasi antara kitosan dengan nanokitosan pada bagian ikatan crosslink yang terbentuk.
oai:ojs.jurnal.upnyk.ac.id:article/330
2014-11-02T21:34:10Z
eksergi:ART
oai:ojs.jurnal.upnyk.ac.id:article/6346
2022-11-07T10:12:47Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6346
2022-11-07T10:12:47Z
Eksergi
Vol 19, No 2 (2022); 77-81
Acid Tar Waste Beneficiation Through Blending with Coal
Musademba, Downmore; Chinhoyi University of Technology
Simbi, David Jambgwa
Kuipa, Pardon Kusaziwa
2022-07-31 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6346
Acid tar waste; blending; binary mixture; proximate analysis
Chinhoyi University of Technology
en
The possibility of blending acid tar waste with coal as a beneficiation method was explored in this work. It was essential to first establish the material properties of the acid tar and coal samples together with that of the blends in terms of proximate analyses. The acid tar waste to coal blending ratios of 3:1, 1:1 and 1:3 were used. It was observed that acid tar waste exhibited high volatile and moisture content with low ash and carbon content when compared with coal. When compared with coal; a 3:1 blending ratio exhibited 56.9 % and 7.6 % reduction in ash and fixed carbon respectively and on the contrary a 38.1 % increase in volatile matter was observed. An opposite trend was obtained with 1:3 blend ratio. The 1:1 blend ratio was found to decrease the volatile and ash content by 8.3 % and 52.7 % respectively whilst fixed carbon boosted by 4.2 %. The choice for the blending ratio to apply is a trade-off between fixed carbon and volatile matter. If volatile matter is of any significance then a 3:1 mixture would be ideal; such a mixture will aid in easier ignition of coal. On the other hand a 1:3 binary mixture yields a higher fixed carbon fraction, whose effect is to boost the calorific value of the fuel, an excellent factor for combustion. Overall however, it makes economic sense to blend coal with acid tar waste for enhancing sustainability.
oai:ojs.jurnal.upnyk.ac.id:article/2013
2017-11-16T13:23:37Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2013
2017-11-16T13:23:37Z
Eksergi
Vol 14, No 1 (2017): Eksergi Volume 14 No 1 2017; 7-11
AKTIVASI DAN APLIKASI ZEOLIT ALAM SEBAGAI ADSORBEN LOGAM KROMIUM DALAM AIR LIMBAH INDUSTRI PENYAMAKAN KULIT
setyaningsih, lucky wahyu nuzulia; aJurusan Teknik Kimia, Fakultas Teknologi Industri, Universitas Islam Indonesia
Jalan Kaliurang Km. 14,5 Sleman, Yogyakarta 55501, Indonesia
2017-09-09 03:32:13
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2013
id
Industri penyamakan kulit menghasilkan limbah cair dengan jumlah yang cukup besar dan mengandung logam berat kromium yang bersifat non-biodegradable sehingga keberadaanya di lingkungan akan terakumulasi hingga mencapai kadar yang berbahaya bagi lingkungan dan manusia. Salah satu metode untuk menangani masalah ini adalah adsorpsi dengan memanfaatkan zeolit alam sebagai adsorben. Zeolit alam dipilih karena memiliki potensi sebagai penjerap dan keberadaanya di alam cukup melimpah. Variasi metode aktivasi dengan pemanasan dan penambahan larutan KOH sebagai aktivator dengan konsentrasi 2M, 4M, 6M akan diuji untuk meningkatkan kemampuan penjerapan. Metode aktivasi secara kimia menggunakan konsentrasi KOH 6M memberikan presentase penjerapan paling baik dengan daya serap terhadap kromium sebesar 12,1065 mg/g. Pengujian model Isotherm yang mewakili proses adsorpsi ini adalah Model Freundlich.
oai:ojs.jurnal.upnyk.ac.id:article/8204
2022-11-18T06:48:30Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8204
2022-11-18T06:48:30Z
Eksergi
Vol 19, No 3 (2022); 153-159
Leaching SiO₂ On Coal Fly Ash As Ammonium Adsorbent In Tofu Liquid Waste Using Hydrothermal Method
Jaya, Danang
Anisa, Anisa
Basuki, Dian Prasetyani
Widayati, Tunjung Wahyu
2022-11-14 03:52:13
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8204
fly ash; tofu; hydrothermal; adsorption; waste
en
Soybean is one of the main food commodities in Indonesia. One of the soybean processing that is often consumed is tofu. Inappropriate treatment of tofu liquid waste is very dangerous for life. It is noted that the ammonia content in tofu liquid waste is 23.3-23.5 mg/l which can cause odors that disturb the residents' comfort. One alternative solution for purifying tofu liquid waste is to carry out an adsorption process using coal fly ash. Fly ash contains metal oxides in the form of SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, K₂O, and Na₂O. The content of SiO₂ as much as 60-70% in it causes fly ash to be very potential to absorb ammonia levels. Extraction of SiO₂ using the sol gel method was carried out using fly ash that had gone through a hydrothermal process. The hydrothermal process is a crystallisation technique in a closed container with high temperature and pressure. After going through the extraction stage, the ongoing process was continued with the washing stage to produce silica powder to adsorb ammonium. The mass required for silica to achieve the optimum ammonia concentration adsorption efficiency is 0.25 gram/20 ml of tofu liquid waste. Meanwhile, the contact time required for silica to achieve the optimum adsorption efficiency of ammonium content is 30 minutes. It was noted that the silica from the optimised fly ash processing had a better quality than the unoptimized silica or commercial silica.
oai:ojs.jurnal.upnyk.ac.id:article/3703
2022-11-07T10:29:53Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3703
2022-11-07T10:29:53Z
Eksergi
Vol 17, No 2 (2020); 51-55
Decreased Concentrations of Anion Phosphate and Sulphate in Wastewater of Xenotime Treatment Process Results using Electrocoagulation method
Rozana, Kharistya
Prabasiwi, Devi Swasti
Ariany, Dewi Puspa
2020-12-14 06:50:11
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3703
Pusat Sains dan Teknologi Akselerator BATAN
id
Indonesia has rare earth mineral resources that have the potential to be processed into beneficial products for human life. In the processing of rare earth mineral resources rarely needed waste treatment devices to reduce contaminants in liquid waste process results. The method of processing with the electrocoagulator system is used because its does not require high levels of technology and costs. In research conducted wastewater treatment process results of xenotime by using method of electrocoagulation with variation of voltage and time of contact. Digestion of xenotime sand using concentrated sulfuric acid and in the content of xenotime sand there is a phosphate anion that binds with metal Y, Dy, Gd, La, Ce, Nd. Xenotime wastewater treatment process with electrocoagulation method is set at voltage variation 7V-13V with variation time of 0-120 minutes. The results of analysis with High Performance Liquid Chromatography (HPLC) showed that there is a decrease in the concentration of phosphate and sulfate anions in the filtrate of the processing results of xenotime wastewater using electrocoagulation method. The lowest concentrations of phosphate and sulfate anions occur in the 13 V voltage condition with 120 minutes of 1.180% and 0.564%.
oai:ojs.jurnal.upnyk.ac.id:article/333
2023-03-22T11:34:06Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/333
2023-03-22T11:34:06Z
Eksergi
Vol 10, No 2 (2010): Versi Cetak; 5-10
Pembuatan Edible Film dari Tepung Jagung
Jaya, Danang; Jurusan Teknik Kimia, Fakultas Teknologi Industri
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Jln. SWK 104 Lingkar utara Condongcatur, Yogyakarta, 5584
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/333
Edible film adalah suatu lapisan tipis yang dibentuk untuk melapisi makanan (coating), berfungsi sebagai penghalang terhadap perpindahan massa dan atau sebagai pembawa aditif. Penggunaan tepung jagung sebagai edible film merupakan solusi yang menarik sebagai pembungkus pangan inovatif yang dapat menyatu pada bahan makanan. Tepung jagung dipilih karena dapat diuraikan oleh mikroorganisme dan dapat dimakan, sehingga dapat dikatakan lebih ramah lingkungan. Pembuatan edible film dari tepung jagung ini bertujuan untuk menentukan kuat tarik dan kelarutan dalam air edible film yang relatif baik terhadap komposisi bahan. Penelitian dilakukan dengan cara melarutkan tepung jagung sebanyak 10 gram dengan aquadest 50 ml, ditambahkan 70 ml aquadest mendidih dan dipanaskan sampai suhu ± 85ºC. Suspensi yang terbentuk didinginkan mengunakan pengaduk stirrer kemudian ditambahkan gliserol dan sorbitol. Edible film yang terbentuk kemudian dicetak dan dikeringkan menggunakan oven pada suhu 100ºC selama ± 4 jam. Perbandingan volume gliserol dengan sorbitol bervariasi dari: 0:1, 0:2,sampai 5:5. Karakterisasi edible film meliputi analisis kuat tarik (sifat mekanik) dan daya larut dalam air (sifat fisis). Komposisi relatif baik untuk sifat edible film yang dihasilkan adalah dengan perbandingan volume gliserol 1 ml dan volume sorbitol 1 ml dengan kuat tarik sebesar 17,2765 N dan daya larut sebesar 0,0091 g/ml.
oai:ojs.jurnal.upnyk.ac.id:article/7405
2022-11-18T06:48:29Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7405
2022-11-18T06:48:29Z
Eksergi
Vol 19, No 3 (2022); 91-96
Effect of Alum Dose in the Coagulation Process for Decreasing the Pollutant in the Palm Oil Mill Effluent: Experimental and Kinetic Analysis
Syaichurrozi, Iqbal; Chemical Engineering UNTIRTA CIlegon
Jayanudin, Jayanudin
Sari, Listiyani Nurwindya
Apriantika, Anellysha Putri
2022-11-15 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7405
Alum; Kinetika; Koagulasi; POME
en
Palm oil mill effluent (POME) is palm oil processing industrial waste that cannot be discharged directly into water bodies. Therefore, this waste must be treated. One method that can be used to treat it is coagulation. The purpose of this study was to investigate the effect of coagulant doses on the coagulation process for treating the POME through experimental and kinetic analysis. The alum dose was varied to 1, 3, 5, 10, 15 g/L. The volume of treated waste was 1 L. Before adding alum, the pH of POME was adjusted to 7.0 with the addition of technical grade NaOH. The coagulation process was carried out for 180 minutes at room temperature. Every 20 minutes, the pH of the liquid was measured and a fluid sample as much as ±50 mL was taken to be settled for 24 hours. Next, the total suspended solid (TSS) concentration in the supernatant was analyzed. The results showed that the addition of alum could decrease the liquid pH and increase the TSS of the liquid. The coagulation process for 180 minutes resulted in a TSS reduction efficiency of 33.3, 33.3, 37.1, 1.7, -17.8% at alum doses of 1, 3, 5, 10, 15 g/L respectively. The first-order kinetic model provided a better prediction than the second-order kinetic model with R2 values of 0.7876-0.9707 and 0.2746-0.8912, respectively.
oai:ojs.jurnal.upnyk.ac.id:article/2383
2018-11-14T09:55:10Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2383
2018-11-14T09:55:10Z
Eksergi
Vol 15, No 2 (2018): Vol. 15 No.2 (2018); 41-47
Pembuatan Penyedap Rasa Alami Berbahan Dasar Jamur untuk Aplikasi Makanan Sehat (Batagor)
Prasetyaningsih, Yusi
Sari, Myra Wardati
Ekawandani, Nunik
2018-11-14 09:54:04
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2383
Ditjen Penguatan Riset dan Pengembangan Kementerian Riset, Teknologi dan Pendidikan Tinggi
id
ABSTRAK: Makanan yang beredar di pasaran mengandung beberapa bahan tambahan pangan seperti penyedap, pemanis dan pengawet. Sebagian besar dari bahan tambahan pangan tersebut menggunakan bahan buatan seperti penyedap sintesis (MSG). MSG dapat diganti dengan penyedap alami yang memiliki kemiripan rasa. Jamur dikenal sebagai salah satu bahan yang bisa dimanfaatkan untuk membuat penyedap rasa alami. Jamur dibuat dalam bentuk serbuk menggunakan alat pengering tipe tray dryer dengan udara pemanas. Tujuan penelitian ini adalah mengetahui pengaruh jenis jamur (jamur tiram dan jamur merang), laju alir udara pengering (0,0028 m3/s, 0,0056 m3/s, 0,0084 m3/s) dan suhu pengeringan (30oC, 40oC, 50oC) terhadap kadar air, kadar abu, kadar serat, kadar protein, lemak dan karbohidrat. Hasil penelitian menunjukkan bahwa kadar air serbuk jamur untuk semua variasi memenuhi SNI yang ditetapkan yaitu maksimum 12%. Analisis proksimat terbaik ditunjukkan pada suhu pengeringan 40oC yang menghasilkan kadar protein sebesar 26,4%, kadar lemak 0,9%, kadar karbohidrat 64,3%, kadar abu 2% dan kadar serat sebesar 6,5%. Variasi laju alir tidak terlalu memberikan pengaruh yang signifikan terhadap uji analisis proksimat. Hasil organoleptik yang diujikan menggunakan serbuk jamur pada batagor menghasilkan penilaian jamur merang memiliki rasa gurih paling tinggi, sedangkan jamur tiram untuk aroma dan tekstur yang paling disukai.Kata Kunci: jamur, penyedap, tray dryer ABSTRACT: Healthy food is one of the important aspects of concern today. Most of these food additives use synthetic ingredients like Monosodium glutamate (MSG). Mushrooms are known as one of the ingredients that can be used to make natural flavorings.. Mushrooms are made in powder form using tray dryer. The purpose of this study was to determine the effect of types of mushroom (Pleurotus ostreatus and Volvariella volvacea), drying air flow rate (1 m/s, 2 m/s, 3 m/s) and drying temperature (30oC, 40oC, 50oC) to the water content, ash content, fiber content, protein, fat and carbohydrate content. The results showed that the moisture content of mushroom powder for all variations fulfilled the specified SNI that is maximum of 12%. The best proximate analysis was shown at a drying temperature of 40oC which resulted in protein content of 26.4%, fat content of 1.1%, carbohydrate content of 64.3 %, ash content of 2% and fiber content of 6.5%. The variation in flow rate does not significantly influence of proximate analysis. The organoleptic results tested using mushroom powder on batagor resulted in the highest tasteful of Pleurotus ostreatus, while Volvariella volvacea for the most preferred aroma and texture.Keywords: mushroom, flavoring, tray dryer
oai:ojs.jurnal.upnyk.ac.id:article/9517
2023-07-14T03:54:14Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9517
2023-07-14T03:54:14Z
Eksergi
Vol 20, No 2 (2023); 89-94
Effect of Non-Natural Additives on Behavior of High Plasticity Clay Stabilization based Cement
Nugroho, Soewignjo Agus
Wisaksono, Bambang; UPN "Veteran" Yogyakarta
Suharyadi, Heru
2023-07-03 10:18:59
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9517
BAFA; bentonite; kaolin; permeability; POFA
id
Cement is proven increasing the strength of soft clays. Monmorillonite has a high shrinkage. Another hand, Kaolin has a small shrinkage. Waste material usage for stabilization agent was widely carried out this decade. BAFA (bottom ash fly ash) and POFA (palm oil fuel ash) are rich in Silica and Alumina, so they used to substitute of cement. The study examined the effect of Monmorillonite, Kaolin, BAFA and POFA on stabilization of clay with cement. Bentonite from 4% to 16% (is equated to BAFA and POFA, in ratio of 2:1) and Kaolin by 2.5%, used to reduce clay shrinkage, mixed with cement by 3% and 5%. Soil behavior will be reviewed from laboratory tests on curing-noncuring and soaked-unsoaked conditions. The results show changes in Atterberg Limits and Hydraulic Conductivity (permeability, k). Cement as well as BAFA and POFA reduce Plastic Limit greater than Liquid Limit. So, Plasticity Index decreased. It’s can be seen that cement and ash waste decreasing the permeability value. More Ash and less cement, make more impermeable soil. Addition of 3% and 5% cement increased the UCS values from 14.32 kPa to 81.20 kPa and 589.68 kPa and CBR value from 0.78% to 4.20% and 589.68 42.12% respectively
oai:ojs.jurnal.upnyk.ac.id:article/361
2015-09-18T03:35:56Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/361
2015-09-18T03:35:56Z
Eksergi
Vol 11, No 2; 11-18
Study of Plate and Frame Heat Exchanger Performance : The Effects of Mass Flow Rate, Inlet Temperature and Type of Flow Againts The Overall Heat Transfer Coefficient
Syaichurrozi, Iqbal; Chemical Engineering Department, Faculty of Engineering, Universitas Agung Tirtayasa, Cilegon,
Metta Karina, Afdwiyarni; Chemical Engineering Department, Faculty of Engineering, Universitas Agung Tirtayasa, Cilegon,
Imanuddin, Ahmad; Chemical Engineering Department, Faculty of Engineering, Universitas Agung Tirtayasa, Cilegon,
2014-12-28 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/361
id
The purpose of this study is to know the effects of mass flow rate, inlet temperature and type of flow againts overall heat transfer coefficient (U). Heat exchanger used in this study was plate and frame type of TRIMGS 10. Mass flow rate of hot fluida was variated into 0.3 and 0.253 kg/s; mass flow rate of cold fluida was variated into 0.276 and 0.22 kg/s; inlet temperature of hot fluida was variated into 40, 45, 50 oC; type of flow was variated into co-current and counter current. The results show that the faster mass flow rate hot and cold fluida, the bigger overall heat transfer coefficient obtained. Also, the higher inlet temperature, the the bigger overall heat transfer coefficient obtained. In this study, the biggest of U value was obtained with variable of inlet temperatur 50°C, mass flow rate of cold fluid 0.276 kg/s, mass flow rate of hot fluid 0.3 kg/s, which were 140.6532 W/m2°C using type of counter-current flow and 135.4576 W/m2°C using type of co-current flow. Type of counter-current flow gave more satisfactory result of U value than type of co-current flow
oai:ojs.jurnal.upnyk.ac.id:article/7584
2022-08-15T04:33:16Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/46-50
2022-08-15T04:33:16Z
Eksergi
Vol 9, No 1 (2009): Versi Cetak
Pengaruh Katalisator Asam pada Proses Pembuatan Gliserol dari Minyak Kelapa Sawit dengan Metanol
Mahargiani, Titik
Subagyo, Purwo
2022-08-11 04:03:12
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/46-50
Pengaruh Katalisator Asam pada Proses Pembuatan Gliserol dari Minyak Kelapa Sawit dengan Metanol
oai:ojs.jurnal.upnyk.ac.id:article/3027
2022-11-07T10:32:57Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3027
2022-11-07T10:32:57Z
Eksergi
Vol 16, No 2 (2019); 42-46
Leaching Neodymium from Magnetic Coal Fly Ash using Acetic Acid Solvent
handoyo, haries
Bendiyasa, I Made
Prasetya, Agus
2019-11-18 08:12:42
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3027
Pusdiklat-BATAN; Puslitbang tekMIRA-Bandung; LPPT-UGM; Lab KEPP-UGM
id
Neodymium (Nd) has been known as a vital component in the modern industry such as for very strong permanent magnets (NdFeB magnet). Some countries are starting to look for alternative sources of Nd such as coal fly ash (CFA), which is the waste from coal combustion. This study aims to look at the potential for Nd extraction from CFA using acetic acid at atmospheric pressure. The effect of CH3COOH concentrations (0,1-1,0 N), and leaching temperature (26-60 oC) was investigated. The experiment was carried out under a constant agitation speed (400 rpm), S/L ratio (3,75 % (W/V)) and CFA particle size (-400 mesh). The highest leaching eficiencies (72%) were achieved for concentration of acetic acid 0,5 N at 60 oC. The leaching kinetics results showed that it best fits the shrinking core model: [t.kap=1-3(1-XB) 2/3 +2(1-XB)] ensuring the overall leaching process is controlled by difussion ash layer. The activation energy determined from the experimental study was of 15,38 kJ/mol.
oai:ojs.jurnal.upnyk.ac.id:article/10353
2024-02-19T03:56:25Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10353
2024-02-19T03:56:25Z
Eksergi
Vol 20, No 3 (2023); 168-171
Signifikansi Kadar Kafein pada Kopi Kerinci Robusta dalam Berbagai Interval Waktu
Soeswanto, Bambang; Politeknik Negeri Bandung
Yusuf, Yusmardhany; Politeknik Negeri Bandung
Sihombing, Rony Pasonang; Politeknik Negeri Bandung
Suryadi, Joko; Universitas Pembangunan Nasional Veteran Yogyakarta
Luviana, Angely; Politeknik Negeri Bandung
Asyari, Restu Adji Alif; Politeknik Negeri Bandung
Adhitasari, Alfiana
2023-11-01 01:52:04
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10353
id
Kopi Kerinci Robusta merupakan salah satu kopi yang digemari masyarakat Indonesia yang tumbuh di daerah Kerinci. Selama ini masyarakat hanya mengenal kopi ini untuk dinikmati saja, tanpa memperhitungkan jumlah kandungan kafein yang akan terkonsumsi. Penelitian ini bertujuan untuk mengetahui rasio terbaik pada ekstraksi kopi Kerinci Robusta menggunakan pelarut etil asetat. Rasio umpan: pelarut (b/v) yang digunakan adalah 1:5; 1:7.5; 1:10; 1:12.5. Pelarut yang digunakan dalam penelitian ini adalah etil asetat. Metode penelitian yang digunakan adalah metode ekstraksi dengan kondisi operasi 50⁰C selama 2 jam dengan interval pengambilan sampel setiap 20 menit. Kadar kafein hasil penelitian diukur dengan menggunakan spektrofotometri pada panjang gelombang 273 nm. Hasil penelitian menunjukkan bahwa rasio optimum adalah rasio 1:5 yang menghasilkan kadar kafein sebesar 3737.41 ppm.
oai:ojs.jurnal.upnyk.ac.id:article/5361
2022-11-07T10:12:47Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5361
2022-11-07T10:12:47Z
Eksergi
Vol 19, No 2 (2022); 46-50
Characteristics and Applications of Sea Water Reverse Osmosis Reject Water of PT Cirebon Electric Power as Voltaic Cell Electrolyte and Salt Raw Material
Pramudikto, Dimas Agung
Nugroho, Satya
Putra, Agik Dwika
Putra, Ilham Satria Raditya
Setyawan, Sigit
Ariyanto, Teguh; Departemen Teknik Kimia FT UGM
2022-07-26 08:41:30
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5361
en
Sea Water Reverse Osmosis (SWRO) reject water produced by PT Cirebon Electric Power has not been optimally utilized. In this research, a study of the characteristics of SWRO reject water was carried out to determine important properties such as turbidity, conductivity, pH and salinity. This characteristic is important as a basis for consideration of SWRO reject water applications. In addition, data were taken from a fairly long period of 5 years of SWRO operation (2016-2021) so that the consistency of the data can be known. The results showed that SWRO reject water had low turbidity (0.18±0.08 NTU), high conductivity of ca. 76.000 µS/cm, neutral pH and high salinity (4.6±0.3%). The study of the utilization of SWRO reject water was then carried out, namely as an electrolyte for salt water lamps and as raw material for making salt. The results showed that SWRO reject water can be used as an electrolyte for salt water lamps which produces a voltage potential up to 1.4 Volts (20% higher than seawater electrolyte). As a raw material for salt, the salt produced has excellent characteristics (eg 99% NaCl) and complies with SNI 3556:2016, except for the KIO3 content.
oai:ojs.jurnal.upnyk.ac.id:article/1699
2019-09-18T04:12:06Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1699
2019-09-18T04:12:06Z
Eksergi
Vol 13, No 2 (2016); 27-32
Pemanfaatan CPO (Crude Palm Oil) Untuk Desulfurisasi Pada Batubara Menggunakan Metode Flotasi
Jaya, Danang
Soegondo, Ebeng; UPN Veteran Yogyakarta
2016-12-31 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1699
id
Sejalan dengan perkembangan pemanfaatan batubara di Indonesia, muncul pula beberapa kendala yang menghambat perkembangan tersebut yaitu adanya gas SO2 hasil pembakaran batubara yang dapat menimbulkan pencemaran udara. Flotasi adalah suatu proses untuk memisahkan padatan halus yang terpisah dari suatu padatan dengan padatan yang lain. Penelitian desulfurisasi pada batubara yang berasal dari bahan baku PLTU menggunakan metode flotasi dilakukan secara kontinyu dalam sebuah alat kolom flotasi. Disini beberapa variabel flotasi diantaranya adalah perbandingan antara batubara dengan CPO yaitu 1:2, 1:4, 1:6 dengan laju alir umpan yang berbeda-beda. Diperoleh kondisi yang optimal pada pengurangan kadar sulfur pada proses flotasi ketika laju alir umpan sebesar 0,3612 L/menit dengan perbandingan CPO/Batubara pada 1:2 dengan sulfur yang terambil sebesar 45,269 %.
oai:ojs.jurnal.upnyk.ac.id:article/8007
2023-03-17T04:46:38Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8007
2023-03-17T04:46:38Z
Eksergi
Vol 19, No 3 (2022); 123-128
Utilization of Papaya Seed Powder as a Bioadsorben to Reduce Total Iron (Fe) in Wastewater
Munira, Munira; Universitas Muslim Indonesia
Aladin, Andi
Perwitasari, Perwitasari; Universitas Pembangunan Nasional Veteran Yogyakarta
Hamza, Nur Aulia
Tulzhaliza, St Umrah
2022-11-15 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8007
id
Papaya is a tropical plant that is widely cultivated in Indonesia. Papaya seeds have a high cellulose content, so that papaya seeds can be used as raw material for adsorbents (biosorbents). Biosorbent is used to reduce environmental pollution through the absorption of various types of liquid waste including heavy metals. Fe is an essential heavy metal if in excess amounts can cause toxic effects. One of the methodes to reduce of iron ion in wastewater is the adsorption method is using papaya seed biosorbents. The aim of study was to determine the effectivness of using papaya seedd as bioadsorbent to reduce of iron ion in the wastewater. Papaya seed as the adsorbent agent activated ones was used in five particle size and contact time variations in order to determine the optimum particle size and contact time of papaya seed powder to absorb the heavy metals. The results show that the optimum adsorbent particle size was 100 mesh and the optimum contact time was 60 minute. The adsorption efficiency of (Fe) metal ions in wastewater was 60%, the adsorption capacity value was 0.365 mg/g. Kinetic modelling of adsorption process is pseudo second order.
oai:ojs.jurnal.upnyk.ac.id:article/3729
2022-11-07T10:29:53Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3729
2022-11-07T10:29:53Z
Eksergi
Vol 17, No 2 (2020); 68-72
Preparation and Characterization of sPEEK-PVA Composite Membranes with Graphene Oxide as filler for Direct Methanol Fuel Cells
Nastiti, Elisa Putri
Hidayati, Nur; Universitas Muhammadiyah Surakarta
2020-12-11 04:52:58
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3729
id
Direct Methanol Fuel Cell (DMFC) is a fuel cell technology that convert chemical energy into electrical energy directly. Sulfonated polyether ether ketones (sPEEK) have potential as proton exchange membranes. Modification of sPEEK with poly vinyl alcohol (PVA) and adding graphene oxide (GO) is expected to reduce methanol cross over. This study was designed to examine the characteristics of the sPEEK-PVA composite membrane using the independent variable variation of GO 2.5-10% w/w. The results showed that water uptake in the range of 20-33%, swelling degree in the range of 10-17.5%, the ion exchange capacity was 0.59-0.75 meq/g, and the methanol permeability was 2.82-4.2 x10-6 cm2 /s. The characters shown are comparable with Nafion's characters and have the potential to be developed because they are superior in terms of raw material prices
oai:ojs.jurnal.upnyk.ac.id:article/11625
2024-03-29T04:05:28Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/11625
2024-03-29T04:05:28Z
Eksergi
Vol 21, No 2 (2024); 55-59
Ekstraksi Minyak Atsiri Jahe (Zingiber officinale) dengan Proses Distilasi: Pengaruh Jenis Jahe dan Metode Distilasi
Daryono, Elvianto Dwi
Hutasoit, Gading F; Institut Teknologi Nasional Malang
2024-03-05 01:21:55
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/11625
id
Minyak atsiri jahe merupakan salah satu komoditas ekspor Indonesia yang sangat potensial untuk dikembangkan. Minyak atsiri jahe banyak digunakan dalam berbagai industri, seperti industri parfum, kosmetik, essence, farmasi dan flavoring agent. Mutu minyak atsiri yang rendah merupakan kendala mengapa minyak atsiri jahe Indonesia kurang laku di pasaran luar negeri. Penelitian ini bertujuan untuk mempelajari pengaruh jenis jahe (jahe gajah, jahe emprit dan jahe merah) serta metode destilasi (distilasi air dan distilasi uap-air) untuk mendapatkan minyak jahe dengan kualitas yang baik. Penelitian dilakukan dengan pengecilan ukuran jahe yang telah dibersihkan, pengeringan irisan jahe dan proses distilasi. Minyak hasil distilasi yang telah dipisahkan kemudian dianalisa. Dari hasil analisa dan perhitungan menunjukkan bahwa setiap jenis jahe mempunyai komposisi dan kandungan minyak jahe yang berbeda. Jahe merah mempunyai rendemen terbesar yaitu 0,342 % dengan kandungan minyak (sineol) sebesar 11,39 %. Metode penyulingan mempengaruhi rendemen dan kualitas minyak jahe yang dihasilkan, dimana metode yang paling baik adalah metode penyulingan air dan uap. Jahe merah mempunyai kualitas minyak jahe terbaik yaitu massa jenis 0,8828 g/mL, bilangan asam 1,136 mg KOH/g, bilangan ester 7,980 mg KOH/g serta memenuhi standart SNI 06-1312-1998.
oai:ojs.jurnal.upnyk.ac.id:article/326
2014-12-07T17:16:00Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/326
2014-12-07T17:16:00Z
Eksergi
Vol 11, No 1; 23-26
Sintesis Katalis Ni/ZSM-5 untuk Pirolisis Cangkang Sawit Menjadi Bio-Oil
Sunarno, Sunaro; Jurusan Teknik Kimia Universitas Riau
Kampus Binawidya Jl.Subrantas Km 12,5 Simpang Baru Pekanbaru 28293
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/326
ID
Increasing of the palm plantation every years can be increase the Crude Palm Oil (CPO) product, effecting the increase of the palm solid waste . One of the solid waste is palm kernel shell which used as energy source for boiler that produce palm ash wich as substant for the synthesis of ZSM-5catalyst (ratio Si/Al= 30). The synthesis of Ni/ZSM-5 by impregnation method at temperature 900 C, for 6 hours, then calcined by the themperature various of 4000 C, 5000 C, and 6000 C during 4 hours with nitrogen gas is flow, and followed by oxidation with oxygen gas and reduction with hydrogen gas flow for 2 hours at themperature 4000 C have been conducted. The resulting Ni/ZSM-5 was analyzed by BET method and applied for pyrolysis proccess of the palm kernel shell to produce bio oil. The bio oil product was charactrized for dencity, viscocity and flash point. The result show that maximum surface area of catalyst forcalcination obtained at 500ºC is 67,874 m2 /g, and study of pyrolysis proccess from 1% mass of palm kernel shell produce of 43% bio oil yield. The characterization result of bio-oil obtained that density is 0.954gr/ml, viscosity is 12.65cp, and flash point is 62o C.
oai:ojs.jurnal.upnyk.ac.id:article/7553
2022-08-15T04:33:34Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7553
2022-08-15T04:33:34Z
Eksergi
Vol 9, No 1 (2008): Versi Cetak; 47-51
PENGARUH KONSENTRASI ABSORBEN (Fe-EDTA) TERHADAP PENURUNAN KANDUNGAN H2S DALAM BIOGAS PADA LAJU ALIR UDARA REGENERASI YANG BERBEDA
Kwartiningsih, Endang
Jumari, Arif
Nur, Adrian
Nugroho, Danu
Sarwanti, Umi
Sapto, Slamet
Ari, Endah
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7553
en
Bíogas is very potential to be used as fuel because of its high content of methane. Biogas had also been developed and used by several industries as alternative fuels to substitute mineral oil, The disadvantage of biogas as fuel was its high content of hydrogen sulfide which is potentíal to pollute the ervironment. Because of this, biogas should be purified first before being used as fuel. Generally, the content of H2S can bereduced physically, chemically or biologically methods, but these methods have many disadvantages. Biogas purílìcation(also other gases) from the content of H2S using Fe-EDTA(Iron Chelated Solution) gave several advantages. The advantages were the absorbent solution can be regenerated that means a cheap operation cost, the separated sulfur was asolid (that is an economic commodity) or resídue that is easy to handle and is save to be disposal to environment. Iron Chelated Solutionwas made by solving the substance of salted iron to EDTA solution. The salt of FeCl2, was made by solving iron waste obtained from lathe machine to hydrochloric acid solution. The research of reduction of the content of H2S in biogas was conducted by contacting Fe-EDTA solution with biogas in an absorber column of 1 m height and 0. I m diameter The rich H2S solution from absorber was then flowed to the separator column to separate the solid of sulfur and its solution. The solution from separator column was then regenerated by oxidation in regenerator column. In regenerator column solution which is rich of iron reacted with oxygen from air to be Fe3. . The solution which is rich of Fe was then used again to absorb H2S in biogas. Biogas used during experiment was obtained from PT Indo Acidatama Tbk. The content of H2S in raw biogas was 2.8235 %. The result of the research showed that the concentration of absorbent influenced the reduction of the content of H2S. Absorbent solution with concentration of 0.2 M of Fe-EDTA was able to absorb 99 % of all H2S from 2.8235 % to 0.02 % in a column of I m height and 0.1 m diameter Absorbent solution with concentratíon of 0.1 M of Fe-EDTA was only able to absorb 59% of all H2S from 2.8235% to 1.2 %. The regeneration air flow rate also influence the reduction of the content of H2S in biogas. The higher the regeneration airflow rate the higher the reduction of the content of H2S.
oai:ojs.jurnal.upnyk.ac.id:article/2290
2022-03-29T08:15:31Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2290
2022-03-29T08:15:31Z
Eksergi
Vol 15, No 1 (2018): Vol 15, No 1 (2018); 16-19
Bioethanol Production From Green Algae Spirogyra sp
Jaya, Danang; Chemical Engineering Universitas Pembangunan Nasional "Veteran" Yogyakarta
Setiyaningtyas, Rahayu; Chemical Engineering Universitas Pembangunan Nasional "Veteran" Yogyakarta
Prasetyo, Sudiyono; Chemical Engineering Universitas Pembangunan Nasional "Veteran" Yogyakarta
2018-07-04 07:42:50
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2290
Bioetanol, Fermentasi, Saccharomyses cerevisiae, Spyrogira sp
en
Bioethanol is an alternative fuel that has potential to replace the oil fuel. The bioethanol feedstock can be derived from the green algae Spirogyra sp that is rarely exploited. High carbohydrates content in the Spirogyra sp algae is highly potential to be developed into ethanol through chemical and biological processes. This research is done through several stages: preparation of raw material, hydrolysis using sulfuric acid 0,2 M, and fermentation using Saccharomyses cerevisiae in an anaerob condition. The objective of this study is to find out the optimum reaction time and optimum quantity of Saccharomyses cerevisiae in the fermentation process. Variations of reaction time and yeast quantity are applied; those are 3, 4, 5 and 6 days for reaction time, and 0,5%; 0,75%; 1%; 1,25%; 1,5%; and 1,75% for yeast quantity. The stoichiometric calculation is used to analyse the result of this experiment. The result shows that the optimum duration for the fermentation is 5 days and the optimum quantity of yeast is 1% by weight. The condition of fermentation process must be held in pH of 4,5 and temperature of 30oC. The produced alcohol in those condition is 0,0613 mol.
oai:ojs.jurnal.upnyk.ac.id:article/9849
2023-07-14T03:54:14Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9849
2023-07-14T03:54:14Z
Eksergi
Vol 20, No 2 (2023); 82-88
Thermogravimetric Analysis and Thermal Decomposition of Bio-Oil Production from Sugarcane Leaves Using Fast Pyrolysis Process
http://jurnal.upnyk.ac.id/index.php/eksergi/article/download/9849/27783
Mufandi, Ilham
Suntivarakorn, Ratchaphon
Treedet, Wasakorn
Singbua, Piyapong
2023-07-03 10:18:59
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9849
Sugarcane leaves; Thermal Decomposition; Pyrolysis; TGA
id
Sugarcane leaves are one of the agro-industrial wastes derived from sugarcane plants. In this research, sugarcane leaves are used as raw material for pyrolysis which produces three main products: liquid, solid, and gas. The focus of this research is to identify the effect of temperature on pyrolysis, identify mass changes, identify decomposition, and identify the chemical composition of bio-oil. The pyrolysis was carried out using a Circulating Fluidized Bed (CFBr) reactor with pyrolysis temperature variations from 440oC to 520oC. Analysis of pyrolysis characteristics of sugarcane leaves are used thermogravimetric analysis (TGA), DTA, and GC-MS analysis. The results showed that the operating temperature had a significant effect on the pyrolysis process. The highest bio-oil found at 480oC, namely 34.33%. TGA results show that the decomposition process of sugarcane leaves is divided into 3 stages: 1) dehydration of water content occurs at <200oC, 2) active pyrolysis occurs from 200oC to 380oC, and 3) passive pyrolysis occurs at temperature from 380oC to 500oC. DTA results show that the thermal changes are affected by the pyrolysis heating rate. The highest bio-oil compounds are β-D-Glucopyranose 1,6-anhydro, acetic acid, and 2-Propanone 1-hydroxy-. This research proves that temperature has an important role in the pyrolysis process.
oai:ojs.jurnal.upnyk.ac.id:article/5341
2023-01-15T05:33:08Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5341
2023-01-15T05:33:08Z
Eksergi
Vol 18, No 2 (2021); 49-55
Fabrication and Characterization of Biodegradable Plastic Based on Mixture of Starch and Cellulose from Corn Waste
Susanti, Ari; Universitas Jember
Kusuma, Heri Septya
Zafira, D.K.
Ilmi, A.B.
Agustina, I.E.
Baqih, L
Prayoga, Arie
2021-11-01 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5341
id
Foodstuffs need proper packaging to prevent spoilage. The use of conventional plastics for packaging has caused environmental problems. It is necessary to develop environmentally friendly packaging as biodegradable plastic. The purpose of this study was to isolate cellulose from corn cobs with three different procedures to determine the best procedure for producing cellulose, as evidenced by the color and results of FTIR analysis. The best cellulose yields are used to make biodegradable plastic films combined with starch and a glycerol plasticizer, sodium montmorillonite nanoclay filler, and clove leaf essential oil. The film that has been made is continued with characterization in the form of analysis of degradation ability, analysis of volatility mass fraction (%), analysis of swelling degree (%), and water solubility (%). The results of this study found that the best cellulose isolation was produced by a procedure 2. The results of the analysis of the degradation ability of the film showed that it was under SNI 7188.7: 2016 with the fastest degradation results within four days with the addition of SMMT. The results of the VMF (%) analysis showed that the presence of EO and SMMT in the composition causes the VMF (%) value to be below. The results of the SD (%) analysis show that the presence of SMMT causes the SD (%) value to increase while the addition of EO causes the SD (%) value to decrease. The results of the WS (%) analysis showed that the presence of SMMT causes the WS (%) to increase, while the addition of EO to the composition variation causes the WS (%) to decrease
oai:ojs.jurnal.upnyk.ac.id:article/2526
2022-11-07T10:31:11Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2526
2022-11-07T10:31:11Z
Eksergi
Vol 16, No 1 (2019); 13-17
Production of Biodiesel from Coconut Waste by In-situ Transesterification Method and Catalyst Calcium Oxide
Maulana, Afriando Ryan; UPN "Veteran" Yogyakarta
Setyoningrum, Tutik Muji
2019-07-23 08:24:30
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2526
id
Biodiesel is an alternative fuel for diesel engine that attracts the world attention. Indonesia is one of the biggest coconut producers in the world. Coconut meat waste is known to still contain up to 24% wt of vegetable oil. The potential of this coconut waste can be used for producing biodiesel that has economical value. This research uses coconut waste as the main raw material. The biodiesel production process is carried out by in-situ transesterification method with methanol as the solvent and reactant; and calcium oxide powder as the catalyst. The catalyst is activated by stirring and heating in methanol. The oil percentage in the coconut waste obtained from soxhletation is 20 % wt. The ratio of methanol to coconut waste of 12.5:1 (v/w) and catalyst to coconut waste of 3.5 % wt results the biodiesel yield of 96.43 % mol. The biodiesel flash point at this variable is 116 °C. This value has met the Badan Standar Nasional (BSN) standard
oai:ojs.jurnal.upnyk.ac.id:article/9214
2024-02-19T03:56:25Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9214
2024-02-19T03:56:25Z
Eksergi
Vol 20, No 3 (2023); 131-136
Degradasi Limbah Detergen dengan Metode Fotokatalis Menggunakan TiO2 / Silica Gel
Amelia, Shinta
Jamilatun, Siti; Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Kampus 4 Ringroad Selatan, Tamanan, Banguntapan, Bantul, DI Yogyakarta, 55164, Indonesia
Shitopyta, Lukhi Mulia; Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Kampus 4 Ringroad Selatan, Tamanan, Banguntapan, Bantul, DI Yogyakarta, 55164, Indonesia
Maryudi, Maryudi; Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Kampus 4 Ringroad Selatan, Tamanan, Banguntapan, Bantul, DI Yogyakarta, 55164, Indonesia
W, Mila Utami; Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Kampus 4 Ringroad Selatan, Tamanan, Banguntapan, Bantul, DI Yogyakarta, 55164, Indonesia
Sriyana, Ida; Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Kampus 4 Ringroad Selatan, Tamanan, Banguntapan, Bantul, DI Yogyakarta, 55164, Indonesia
2023-10-31 23:53:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9214
id
Limbah detergen dihasilkan dari laundry dan limbah rumah tangga yang menyebabkan pencemaran air yang merusak organisme dalam perairan. Detergen terdiri atas tiga komponen utama, yaitu surfaktan, builders dan aditif. Surfaktan jenis Alkyl Benzene Sulfonat (ABS) dan Linear Alkylbenzene Sulfonate (LAS) merupakan senyawa aktif detergen. Tujuan dari penelitian ini untuk mempelajari proses degradasi fotokatalis dalam menurunkan konsentrasi LAS dan ABS dengan variabel bebas konsentrasi bahan aktif detergen dan waktu penyinaran. Pengolahan limbah detergen yang digunakan pada penelitian ini adalah metode fotokatalis TiO2 dengan penyangga silica gel. Variasi konsentrasi LAS dan ABS yaitu 50 ppm dan 100 ppm menggunakan katalis silica gel /SiTiO2 sebanyak 0,05gram dengan variasi waktu penyinaran sinar UV sampai 24 jam. Persentase degradasi yang dihasilkan dalam waktu 24 jam dengan katalis silica gel-TiO2 pada ABS 50 ppm yaitu 96,08% dan ABS 100 ppm yaitu 99,00%. Sedangkan Persentase degradasi yang dihasilkan dalam waktu 24 jam dengan katalis silica gel-TiO2 pada LAS 50 ppm yaitu, 96,61% dan LAS 100 ppm yaitu 99,61%. Penggunaan katalis silica gel - TiO2 dalam LAS lebih efektif dan mempunyai sifat yang lebih baik dibandingkan ABS karena LAS mudah terurai sehingga semakin lama penyinaran warna larutan menjadi pudar dan proses degradasi fotokatalis menjadi lebih mudah.
oai:ojs.jurnal.upnyk.ac.id:article/6581
2022-11-07T10:13:06Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6581
2022-11-07T10:13:06Z
Eksergi
Vol 19, No 1 (2022); 15-19
Effect of NaNO3 Concentration in Medium of Raoof on Cultivation of Spirulina Platensis
Syaichurrozi, Iqbal; Chemical Engineering UNTIRTA CIlegon
Wardalia, Wardalia
Dwicahyanto, Sharfan
Toron, Yustinus Selis
2022-04-05 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6581
id
Nutrition is one of the factors that affect the growth of Spirulina platensis. The cultivation medium proposed by Raoof is a modified version of Zarrouk medium. Raoof medium requires less nutrients than Zarrouk medium but the biomass produced is almost the same. This study was conducted to vary the concentration of NaNO3 of 0.5; 1.5; 2.5; 3.5 g/L in Raoof medium to study its effect on growth and biomass composition of S. platensis. At each concentration of NaNO3 of 0.5; 1.5; 2.5; 3.5 g/L obtained the highest biomass concentration of 0.6425; 0.6455; 0.6745; 0,5193 g/L on days 12, 12, 12, 10. Concentration of NaNO3 of 2.5 g/L resulted in the highest specific growth rate of 0.1371/day and the lowest double time of 5.0566 days. In general, increasing the concentration of NaNO3 from 0.5 to 2.5 g/L increased the protein content from 33.30 to 36.98%. The addition of higher NaNO3 (3.5 g/L) actually decreased the protein content to 35.52%.
oai:ojs.jurnal.upnyk.ac.id:article/1436
2016-06-16T13:01:37Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1436
2016-06-16T13:01:37Z
Eksergi
Vol 13, No 1 (2016); 13-16
Kinetika Reaksi Pirolisis Enceng Gondok
Puspitasari, Mitha; UPN "Veteran" Yogyakarta
Sutijan, Sutijan
Budiman, Arief
2016-02-24 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1436
enceng gondok; pirolisis; kinetika
en
Enceng gondok merupakan tanaman pengganggu dalam ekosistem air karena pertumbuhannya yang sangat cepat sehingga perlu dipikirkan cara untuk pemusnahan tanaman ini. Namun enceng gondok merupakan biomassa yang mempunyai kandungan hemiselulosa, selulosa dan lignin yang tinggi. Pirolisis adalah metode yang tepat untuk mengubah biomassa yang diproses secara termal menjadi produk yang bernilai. Pirolisis merupakan proses degradasi termal untuk mengahasilkan bio-char, bio-oil dan bio-gas tanpa adanya oksigen. Tujuan penelitian ini adalah untuk mencari suhu optimum dari proses pirolisis dan mencari parameter kinetika untuk membantu peneliti dalam merancang reaktor dan memahami reaksi yang terjadi. Model yang diusulkan untuk mempresentasikan reaksi pirolisis enceng gondok adalah Compatting model. Hasil dari penelitian ini menunjukkan bahwa suhu 600°C merupakan suhu optimum untuk mengahasilkan bio-oil. Dengan menggunakan program matlab konstanta kinetika reaksi pada pembentukan gas pada proses pirolisis enceng gondok adalah k1=3,4997exp-14069,21/RTmen-1, konstanta kinetika reaksi pembentukan bio-oil adalah k2=0,3430exp-3059,451/RTmen-1 dan konstanta kinetika reaksi pembentukan char adalah k3=0,2526 exp-2313,395/RT men-1.
oai:ojs.jurnal.upnyk.ac.id:article/7616
2022-08-15T04:32:42Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7616
2022-08-15T04:32:42Z
Eksergi
Vol 10, No 1 (2010): Versi Cetak; 44-48
PENGAMBILAN NIKOTIN DARI BATANG TEMBAKAU
Suhenry, Sri
2022-08-15 02:24:15
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7616
Tanaman tembakau dimanfaatkan oleh masyarakat dengan diar¡bil daunnya. Daun ini digunakan sebagai bahan baku untuk membuat rokok. Nikotin merupakan senyawa penting yang ada di dalam daun tembakau, Nikotin bersifat racun bagi manusia maupun hewan, sehingga banyak orang yang menderita gangguan pemafasan akibat merokok. Beberapa penelitian telah dilakukan untuk mengambil nikotin dari daun tembakau sehingga dihasilkan daun tèmbakau dengan kadar nikotin rendah dan nikotin yang dihasilkan dapat digunakan untuk bahan obat dan untuk bahan insektisida. Cara pengambilan nikotin dari daun tembakau ini dicoba untuk digunakan mengambil nikotin dari batang tembakau. Untuk ekstraksi ini digunakan air sebagaipelarut dan hasil zat terektraksi dianggap nikotin dengan sedikit zat lain. Variabel penelitian ini ialah waktu ekstraksi, perbandingan serbuk batang tembakau dengan air dan suhu elstraksi, Kondisi terbaik untuk ekstrakí dicapai padã perbandingan bãhan dengan pelarut 100 gram: 400 ml air, suhu ekstraksi 90oC dan waktu ekstraksi 90 menit pada kecepatan pengadukan 250 rpm'
oai:ojs.jurnal.upnyk.ac.id:article/3098
2022-11-07T10:29:53Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3098
2022-11-07T10:29:53Z
Eksergi
Vol 17, No 2 (2020); 33-38
Profil Release Enkapsulasi Antosianin, Flavonoid dan Fenolik pada Kulit Semangka Menggunakan Metode Spray Drying
Kistriyani, Lilis; Program Studi Teknik Kimia, Universitas Islam Indonesia
Fauziyyah, Farah; Prodi Teknik Kimia, Universitas Islam indonesia
Rezeki, Sri; Prodi Teknik Kimia, Universitas Islam Indonesia
2020-12-11 04:52:47
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3098
id
Daerah Istimewa Yogyakarta merupakan salah satu daerah yang memiliki potensi bencana alam yang cukup tinggi. Makanan adalah bahan habis pakai yang paling dibutuhkan saat bencana alam terjadi. Untuk menjaga makanan bergizi yang akan didistribusikan ke korban bencana alam tetap layak untuk dimakan, diperlukan suatu adanya alternatif berupa pengawet alami makanan. Dalam penelitian ini, dipilih kulit semangka sebagai bahan untuk membuat pengawet alami karena mengandung flavonoid dan antosianin. Tujuan penelitian ini adalah untuk mengetahui banyaknya kandungan total antosianin, flavonoid dan fenolik pada kulit semangka merah serta mengetahui pengaruh komposisi kitosan terhadap kemampuan pelepasan antosianin, flavonoid dan fenolik pada makanan. Penelitian ini dilakukan dengan metode ekstraksi dan enkapsulasi. Pada proses enkapsulasi digunakan teknik spray drying. Analisa yang dilakukan antara lain pengujian analisis kandungan Total Antosianin (TA), Total Flavonoid (TF) dan Total Fenolik (TPC) di dalam supernatant, serta analisa uji in vitro (uji kemampuan pelepasan flavonoid dan fenolik) pada makanan. Kandungan total antosianin pada kulit semangka merah sebesar 0,1113 mg/L. Kandungan total flavonoid pada kulit semangka merah sebesar 0,6159 g/mL. Kandungan total fenolik kulit semangka merah sebesar 0,3410 g/mL. Pada uji in vitro untuk senyawa flavonoid maupun fenolik, terjadi ketidakstabilan pelepasan kadar flavonoid dan fenolik terhadap waktu pada variasi kitosan 0,4 gram, 0,5 gram, dan 0,6 gram. Namun dari hasil rata-rata pelepasan kadar flavonoid dan fenolik, yang paling tinggi terjadi pada variasi kitosan 0,6 gram, dengan masing-masing nilai yaitu untuk flavonoid 0,1172 gram/mL dan untuk fenolik 0,0867 gram/mL. Hal ini menunjukkan bahwa semakin tinggi kadar kitosan, maka pelepasan kadar flavonoid dan fenolik juga meningkat.
oai:ojs.jurnal.upnyk.ac.id:article/10974
2024-02-19T03:48:35Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10974
2024-02-19T03:48:35Z
Eksergi
Vol 21, No 1 (2024); 24-28
Studi Efektivitas Pemanfaatan Arang Aktif Cangkang Kelapa Sawit (Elaeis guineensis) Sebagai Adsorben Pengurangan Kadar Amonia Limbah Cair Tahu
Desfitri, Erda Rahmilaila; Teknologi Rekayasa Energi Terbarukan Universitas Bung Hatta, Gunung Panguilun, Padang 25143, Indonesia
Arifanda, Aditya Yoga; Teknik Kimia Universitas Bung Hatta, Gunung Panguilun, Padang 25143, Indonesia
Yulianti, Amro; Teknik Kimia Universitas Bung Hatta, Gunung Panguilun, Padang 25143, Indonesia
Paysmi, Paysmi
Desmiarti, Reni; Teknik Kimia Universitas Bung Hatta, Gunung Panguilun, Padang 25143, Indonesia
2024-03-08 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10974
id
Limbah cair tahu mengandung gas-gas yang terdekomposisi bahan-bahan organik yang terdapat di dalam air buangan seperti gas nitrogen (N2), oksigen (O2), hidrogen sulfida (H2S), ammonia (NH3), karbondioksida (CO2) dan metana (CH4). Penelitian sebelumnya menemukan bahwa kandungan ammonia pada limbah cair tahu berkisar antara 21,4 mg/L hingga 33,5 mg/L. Angka ini sangatlah tinggi jika dibandingkan dengan standar yang sudah ditetapkan oleh pemerintah yaitu sebesar 8 mg/L. Tujuan dari penelitian ini adalah untuk mengurangi pencemaran lingkungan yang disebabkan oleh ammonia yang berasal dari limbah cair tahu dan mengoptimalkan pemanfaatan limbah cangkang kelapa sawit. Pengurangan kadar ammonia ini dilakukan dengan metode adsorbsi, sedangkan metode analisis kadar ammonia menggunakan spektrofotometri. Arang aktif cangkang kelapa sawit diaktivasi menggunakan larutan H2SO4. Variasi waktu kontak yang digunakan adalah 30, 60, 90 dan 120 menit, sedangkan variasi massa adsorben adalah 2, 4, 6 dan 8gram. Hasil penelitian menunjukkan kondisi optimal untuk proses adsorpsi ammonia adalah 30 menit waktu kontak dengan 4gram jumlah arang aktif. Hasil karakterisasi menunjukkan bahwa arang aktif memenuhi standar kualitas dan cocok untuk mengurangi kadar ammonia dalam limbah cair tahu. Hasil penelitian ini dapat diaplikasikan untuk pemanfaatan limbah cangkang kelapa sawit untuk penurunan konsentrasi ammonia pada limbah cair tahu.
oai:ojs.jurnal.upnyk.ac.id:article/321
2014-12-07T17:16:00Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/321
2014-12-07T17:16:00Z
Eksergi
Vol 11, No 1; 31-36
Processing Biochar from Solid Waste of Arenga Pinnata Flour Industry
Rina, ST, MT, Susanti; Program Studi Teknik Kimia, FTI, UPN”Veteran” Yogyakarta
Jln. SWK 104 (Lingkar Utara), Condongcatur, Yogyakarta
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/321
ID
Arenga pinnata solid waste can be used as biochar-making material because it contains biomass agriculture and forestry residue. This research purposed to know the effect of pyrolysis in yield and characteristic of biochar as soil amendment. The research done by making model and practice the model. The variables of this research were : temperature, biochar yield, C-organic content, water content, pH, N, P, and K. The raw materials weight that used in each pyrolysis process is 200 grams.The result from this research are the highest biochar yield from arenga pinnata with 200 grams of raw materials weight was at 300 – 500 °C of temperature and 210-240 minutes of processing time with >30% of yield. The test with temperature variations show : 1) at 300-400°C of temperature acquired 4,45% of water content, 5,6 of pH, 14,63% of C-organic content, 0,71% of Nitrogen, 0,10% of Phosphor, and 0,63% of Kalium, 2) at 400-500°C of temperature acquired 5,62% of water content, 5,26 of pH, 13,49% of C-organic content, 0,73% of Nitrogen, 0,13% of Phosphor, and 0,49% of Kalium, 3) at 500-600°C of temperatur acquired 3,22% of water content, 6,1 of pH, 15,66% of C-organic content, 0,92% of Nitrogen, 0,09% of Phospor, and 0,58% of Kalium. The results from this research were able to fulfill the regulation as soil amendment determined by International Biochar Initiative (2010).
oai:ojs.jurnal.upnyk.ac.id:article/7547
2022-08-15T04:33:34Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7547
2022-08-15T04:33:34Z
Eksergi
Vol 9, No 1 (2008): Versi Cetak; 22-26
Penggunaan Chlorella sp. sebagai Alternatif untuk Mengolah Limbah Cair Industri Pengolahan Susu
Pratiwi, Yuli
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7547
en
One of methods of treating waste in the most efective and chepest way is by biological method because it utilize mícrobes that are abundant in natural etwironment. Microbe actívities can be utilízed to produce a system that can accomplish recycling process, so they can control the quality of waste. This research is aimed to carry out test by utilizing microbes Chlorella sp. that is belonged to phytoplanktons that are used as innoculum for treating waste miIk industry. The research was conducted at the Environmental Technical Laborotory of ISTA Yogtøkortarta for 3 months, wíth activities starting from Chlorella sp. culturing, preliminary research for determining the concentration of optimal inocallum growth to the main research, the application of Chlorella sp. for milk waste treatment. From the result of research, it was evident that milkwaste milk Índustry exerted positive influence on the growth of Chlorella sp. that could reached optimal rate. The optimal growth rate, in turn, could be utilized to improve milkwaste quality, especially to reduce BOD, soluble CO, and to íncrease DO as well as to neutralize pH. Other efect of optimal Chlorellasp. growth was that protozoa populatíon growth that sustain and acceleratethe treatment of this milkwaste.
oai:ojs.jurnal.upnyk.ac.id:article/2147
2018-01-23T00:11:51Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2147
2018-01-23T00:11:51Z
Eksergi
Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 40-52
Pengembangan Pemanfaatan Pengolahan Air Dalam Upaya Pemenuhan Kebutuhan Air di Dusun Temuireng, Desa Girisuko, Panggang, Gunungkidul
Sugiarto, Bambang; Teknik Kimia, Universitas Pembangunan Nasional “Veteran” Yogyakarta, 5528, Indonesia
2017-12-31 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2147
air; coliform; flokulsi-sedimentasi; saringan pasir lambat; distalasi percik tenaga surya
id
Air merupakan kebutuhan penting bagi hajat hidup warga di Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta. Temuireng merupakan salah satu desa di kecamatan Panggang, Kabupaten Gunung kidul, yang kebutuhan airnya masih jauh dari cukup. Di desa ini terdapat 269 kepala keluarga dengan rata-rata 4 jiwa di setiap kepala keluarga, sehingga terdapat kurang lebih 1076 jiwa yang kebutuhan airnya masih belum terpenuhi. Air untuk suplai ke desa ini terkendala oleh kemampuan pemompaan dan kualitas air baku. Kualitas air baku dimusim curah hujan tinggi yang berasal dari Baron maupun gua Ngobaran masih mengandung bakteri E-Coli 9000 per 100 ml sedang total bakteri Coliform 28000 per 100 ml. Dari analisa air dimusim curah hujan sedang total coliform 4000 per 100 ml, dan analisa air dimusim curah hujan rendah (kemarau) total coliform berkisar 400 per 100 ml. Dari persyaratan maksimum 50 per 100 ml. Material terjerap dalam media karst saling berkaitan, antara bahan organik (parameter coliform) dan anorganik (parameter TDS). Dengan proses pengolahan secara laboratorium yang melibatkan proses flokulasi, sedimentasi, untuk dosis tawas, PAC dan biji Kelor sebesar 0,5 – 1 ppm mampu menurunkan TDS dari kisaran 262-288 ppm menjadi dibawah 200 ppm, dan jika dilanjutkan dengan filtrasi dengan media filter zeolit mampu menurunkan TDS hingga dibawah 180 ppm dalam waktu pengendapan 30 menit. Dan untuk dosis kelor jika dilanjutkan dengan perlakuan filter karbon mampu menurunkan TDS hingga dibawah 160 ppm dalam waktu filtrasi 30-60 menit. Sedang untuk proses olahan dengan destilasi percik tenaga surya, dimungkinkan terjadi penurunan TDS maupun coliform namun diperlukan intensitas sinar matahari yang cukup tinggi untuk proses penguapan.ABSTRACT: Water is an important resource for the people in Gunung Kidul Regency, Special Region of Yogyakarta, Indonesia. Water scarcity is one of big issue in Temuireng, one of panggang’s district in the Gunung Kidul regency. There is 269 family living in this villge and every family consist of four person so there are approximately 1076 person who need the clean water. The clean water supply for this village constrained by pump power and raw water quality. Raw water quality in rainy season (high rainfall intensity) contains of E-Coli 9000 per 100 ml and total Coliform bacteri 28000 per 100 ml. Raw water quality in medium rainfall intensity season contains of total Coliform 4000 per 100 ml and raw water quality in summer season (low rainfall intensity) contains of total Coliform 400 per 100 ml, from maximum regulation 50 per 100 ml. Material absorbed in karst include organic (coliform parameter) and anorganic (TDS parameter), which related in each other, can contaminate the water. Flocculation and sedimentation using 0.5-1 ppm doses of alum, PAC and kelor are performed to purify the water. The coagulant can decrease TDS parameter from 262-288 ppm to under 200 ppm, and if this process continued with filtration (filter zeolit), it can decrease TDS parameter to under 180 ppm in 30 minute. If the process continued by filtration process (carbon filter) using kelor, it can decrease TDS parameter to under 160ppm in 30-60 minute. Using spark destilation solar energy process can decrease TDS parameter and coliform bacteria, but this process need high sunlight intensity for evaporation.
oai:ojs.jurnal.upnyk.ac.id:article/8733
2023-04-10T03:14:43Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8733
2023-04-10T03:14:43Z
Eksergi
Vol 20, No 1 (2023); 29-34
The Effect of Concentration and Type of Immersion Media (Water, Alcohol, Salt, And Vinegar Acid) on Decreasing Oxalate Levels in Porang
Sugiarto, Bambang
Setyawan, Adhi; UPN "Veteran" Yogyakarta
Nurmalitasari, Octavia; UPN "Veteran" Yogyakarta
Sulistyowati, RR Endang; UPN "Veteran" Yogyakarta
2023-03-02 03:28:06
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8733
Tubers; Porang; Oxalate; Permanganometric; Immersion
id
Porang tubers (Amorphophallus oncophyllus) contain very high levels of glucomannan and have many benefits in various fields of health, pharmaceuticals, industry, and food. Apart from having great benefits, porang tubers contain calcium oxalate which can cause itching if consumed directly, irritation, and kidney stones. This study aimed to determine the decrease in oxalate levels in porang tubers using various concentrations and types of immersion media in porang. The types of immersion media are water, salt, alcohol, and vinegar. Water immersion was carried out at 30°C, 40°C, 50°C, 60°C, and 70°C. Immersion with salt was carried out at concentrations of 6%, 8%, 10%, 12%, and 14%. Immersion with alcohol was carried out at concentrations of 20%, 30%, 40%, 50%, and 60%. The vinegar immersion was carried out at concentrations of 10%, 15%, 20%, 25%, and 30%. Oxalate levels were analyzed by the permanganate titration method. The results of immersion porang with dice and long slices in this study showed that water with a temperature of 50°C in the 5th immersion, alcohol with a concentration of 60% in the 5th immersion, salt solution with a concentration of 14% in the 5th immersion, and acetic acid with a concentration of 30% in the 5th immersion is the optimal result.
oai:ojs.jurnal.upnyk.ac.id:article/4559
2022-11-07T10:15:39Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4559
2022-11-07T10:15:39Z
Eksergi
Vol 18, No 1 (2021); 24-28
The effects of Ultrasonication Pretreatment to Enzymatic Hydrolysis of Spirulina platensis Residue
Lestari, Indriana; Universitas Pembangunan Nasional "Veteran" Yogyakarta
Anggorowati, Heni
Hadi, Faizah
2021-05-06 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4559
LP3M Universitas Pembangunan Nasional "Veteran" Yogyakarta
id
The development of renewable energy from microalgae sources is still being studied to overcome the world energy crisis, one of which is biodiesel from Spirulina platensis. However, the extraction process from Spirulina platensis to obtain oil leaving waste called Spirulina platensis residue (SPR). SPR still contains carbohydrates in the form of cellulose in cell walls and starch in plastids. Carbohydrates can be converted into bioethanol through the hydrolysis process. To optimize the enzymatic hydrolysis of carbohydrates, pretreatment is needed to break down the cell walls. One method of pretreatment is ultrasonication. This study aimed to determine the effect of ultrasonication pretreatment on enzymatic hydrolysis. Ultrasonication was carried out with time variations (15, 30, and 45 minutes) then continued hydrolysis at 40 oC for 8 hours using α-amylase and glucosidase (1: 1) enzymes. The results of hydrolysis in the form of reducing sugars were analyzed using the Nelson Somogyi method and obtained an optimal pretreatment time is 30 minutes with a reducing sugar concentration of 2.493,3 mg/L
oai:ojs.jurnal.upnyk.ac.id:article/339
2022-08-15T04:32:21Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/339
2022-08-15T04:32:21Z
Eksergi
Vol 10, No 2 (2010): Versi Cetak; 42-46
Fenomena dan Kecepatan Minimum Fluidisasi
Widayati, Widayati; Program Studi Teknik Kimia, Fakultas Teknologi Industri
UPN “Veteran” Yogyakarta
Telp/Fax: 0274486889
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/339
Phenomenon and the minimum fluidization velocity (Umf) solid-gas depend of particle type, gas flow rate, column diameter and height of solids bed. This research was conducted on sand of quartz, iron and volcano Merapi (group B the particle) in the column with 6 cm diameter and height of the bed that varies are 6 cm, 8 cm and 10 cm. Observations began after the air with the lowest velocity flow from the bottom upwards through the bed. From the observations obtained a phenomenon that occurs is the fixed bed, bubbling fluidization and slugging fluidization. Umf in the height of bed 6 cm were 10.3 cm/sec, 7.3 cm/sec and 4.8 cm/sec. While at the height of bed 8 cm were 11.9 cm sec, 7.3 cm/sec and 5.1 cm/sec. and at the height of the bed 10 cm value (Umf) obtained were 8.8 cm/sec, 8.8 cm/sec and 5.8 cm/sec. Based on theoretical, the Umf for quartz sand was 12.0 cm/sec, iron sand 16.2 cm/sec and sand volcano Merapi 12.3 cm/sec. Thus, the value Umf, an experiment that comes closest to the value Umf theory only occurs for the use of quartz sand column diameter of 6cm and 8cm height of the bed.
oai:ojs.jurnal.upnyk.ac.id:article/7579
2022-08-15T04:33:16Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/16-23
2022-08-15T04:33:16Z
Eksergi
Vol 9, No 1 (2009): Versi Cetak
Polymerization Styrene dengan Solven Toluena
Murni, Sri Wahyu; Chemical Engineering UPN "Veteran" Yogyakarta
Nuri, Wasir
Lestari, Indriana
Saraswati, Ani
2022-08-11 04:03:10
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/16-23
en
Polystyrene is the result of free radical-addition polymerization of styrene monomer with the initiator benzoyl peroxide. This research aims to study the effect of variable temperature and ratio of toluene-styrene (T / S) against the conversion and reaction kinetics of polymerization of styrene with toluene solvent and initiator benzoyl peroxide. This research was conducted in two stages, ie preliminary experiments with test FTIR (Fourier Transform Infra-Red) to prove that the manufacture of polystyrene was successful. Manufacture of polystyrene begins with purifying styrene monomer, and then enter a toluene-styrene (5:1 volume ratio, 5:2, 5:3, 5:4) and 0.2 gram of benzoyl peroxide into a three-neck flask and heated to the desired temperature (60, 70, 80, 90 and 100)oC. Samples were taken every 15 minutes. Each sample is added 0.01 grams of hydroquinone in 10 ml of ethanol and shaken gently to precipitate the polystyrene, then wet samples were weighed, put in oven at 200oC for 1.5 hours. Dried sample was cooled in eksikator then weighed to determine the weight of polystyrene formed. From the experimental results at optimum condition of reaction time of 120 minutes, the temperature of 100oC and toluene-styrene ratio of 5:4, obtained by conversion of 58.75%. The global rate reaction according to equation k' = 5963 exp (-8901 / T).
oai:ojs.jurnal.upnyk.ac.id:article/5660
2023-01-15T05:33:08Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5660
2023-01-15T05:33:08Z
Eksergi
Vol 18, No 2 (2021); 82-88
Potency of Spirulina platensis as a source of cosmetic and bioplastic (review)
Azimatun Nur, Muhamad Maulana
Setyoningrum, Tutik Muji
Aziz Suwardi, Halim Nur
Alfitamara, Bety
Kurniawan, Adi
Prananda, Vinka Azzah
Afni, Dwi Nur
Alodia, Sheila
Pamularsih, Retno
2021-11-01 00:00:00
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5660
id
Spirulina plantesis is a cyanobacteria that has many purposes such as for cosmetics, and food industry. In addition, Spirulina platensis can accumulate polyhydroxybutyrate (PHB), a type of bioplastic. This review discussed the potency of Spirulina platensis as a source of bioplastics and cosmetics. From the review, Spirulina contained bioactive compound, C-phycocyanin, which can inhibit cell damage and is very potential to be applied for cosmetics. The PHB content in Spirulina tends to be small compared to other microalgae. To reduce the cost of PHB from Spirulina, the biorefinery concept can be applied, by recovery the bioactive components (C-phycocyanin), while the residue can be used as a source of PHB.
oai:ojs.jurnal.upnyk.ac.id:article/953
2015-07-09T01:34:12Z
eksergi:ART
driver
v2
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/953
2015-07-09T01:34:12Z
Eksergi
Vol 12, No 1 (2015); 05-07
Simple Extraction of Dragon Fruit (Hylocereus polyrhizus) Peel as Natural Dye Colorant
Sudarmi, Sri; Department of Chemical Engineering, Faculty of Industrial Technology, UPN “Veteran” Yogyakarta
Jl. SWK 104 Lingkar Utara Condongcatur Yogyakarta. 55283
Subagyo, Purwo; Department of Chemical Engineering, Faculty of Industrial Technology, UPN “Veteran” Yogyakarta
Jl. SWK 104 Lingkar Utara Condongcatur Yogyakarta. 55283
Susanti, Anna; Department of Chemical Engineering, Faculty of Industrial Technology, UPN “Veteran” Yogyakarta
Jl. SWK 104 Lingkar Utara Condongcatur Yogyakarta. 55283
Wahyuningsih, Anggun Sri; Department of Chemical Engineering, Faculty of Industrial Technology, UPN “Veteran” Yogyakarta
Jl. SWK 104 Lingkar Utara Condongcatur Yogyakarta. 55283
2015-07-09 00:56:21
Authors who publish with this journal agree to the following terms:Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
url:http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/953
Dragon fruit peel; anthocyanin; dye colorant; simple extraction
id
Natural dyes can be obtained from the pigments that contained from leaves, fruit, and rind of the plants. Dragon fruit peel is one of the potential natural pigment source. Almost 30-35% of the peel fruit is often simply thrown away as trash. Dragon fruit peel provides natural red color produced by pigment called anthocyanin which can be used as a subtituent from synthetic dyes to natural dyes. This research was objected to find the optimum conditions for anthocyanin extraction of dragon fruit peel. Simple extraction was carried out by using 80% ethanol solvent with variable ratio of the amount of material and solvent (1: 9 to 1:13), temperature (50◦ to 80◦ C) and time (1 to 5 hours). Optimum result was obtained from a ratio F: S 1:11, temperature 50◦C, for 3 hours.
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