2024-03-29T10:57:50Z
http://jurnal.upnyk.ac.id/index.php/eksergi/oai
oai:ojs.jurnal.upnyk.ac.id:article/7612
2022-08-15T04:32:42Z
eksergi:ART
driver
POLIMERISASI AKRILAMIDA DENGAN METODE MIXED SOLVENT PRECIPITATION MENGGUNAKAN INISIATOR KALIUM PERSULFAT
Sulistyawati, Endang
Poliakrilamida merupakan hasil polimerisasi adisi radikal bebas menggunakan monomer akrilamida dan inisiator kalium persulfat. Polimerisasi ini meliputi tiga tahap, yaitu : inisiasi, propagasi dan terminasi. Metode yang digunakan adalah Mixed Solvent Precipitation dengan campuran pelarut etanol-air. Penelitian bertujuan mengetahui pengaruh suhu dan waktu terhadap konversi, kinetika reaksi dan berat molekulpolimer. Penelitian dilakukan dengan mereaksikan monomer akrilamida dengan campuran pelarut etanol dan air (perbandingan 3:1) serta inisiator kalium persulfat. Reaksi dilakukan pada suhu 40oC, 50oC, 60oC, 70oC dan 75 oC. Dari hasil polimerisasi akrilamida diperoleh persamaan konstanta kecepatan reaksi sebagai fungsi suhu dan pada konsentrasi monomer 20%, suhu reaksi 70oC, waktu reaksi 240 menit diperolehkonversi 58,07% dan berat molekul 61580,83 g/mol.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7612
10.31315/e.v10i1.7612
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 21-28
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 21-28
2460-8203
1410-394X
10.31315/e.v10i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7612/4594
Copyright (c) 2022 Endang Sulistyawati
oai:ojs.jurnal.upnyk.ac.id:article/3097
2023-02-22T02:59:50Z
eksergi:ART
driver
Preparation of Porous Carbon from Coffee Ground Waste as Matrix of Urea Slow Release Fertilizer
PREPARASI KARBON BERPORI DARI LIMBAH AMPAS KOPI SEBAGAI MATRIKS PADA PEMBUATAN SLOW RELEASE FERTILIZER
Diana, Diana
Mukti, Nur Indah Fajar
Fachreza, Fakhri
Irfansyah, Irfansyah
karbon berpori, ampas kopi, slow release fertilizer
Urea is one of the fertilizers that are widely used in agriculture. However, the absorption efficiency of urea for plants is currently only around 30%. Therefore, to increase its absorption in plants it is necessary to control the release of urea by making it a Slow Release Fertilizer (SRF) fertilizer. The use of SRF is expected to control the release of nutrients according to the time and amount needed by plants. Natural material which has the potential as a matrix of SRF fertilizer is coffee grounds waste. This research produces carbon from coffee pulp waste which can be used as a matrix in the manufacture of urea SRF fertilizer. With the addition of a matrix of coffee carbon is expected to slow the rate of release of urea into nature. So that the process of absorption of urea into plants will be more leverage. Coffee pulp was pyrolysed with pyrolysis temperature variation (400 - 600oC) using ZnCl2 as activator. The iodine number value of coffee grounds carbon produced decreases with increasing temperature. The addition of carbon coffee grounds can inhibit the release of urea from 81.5% to 26% for 30 days.
Urea merupakan salah satu pupuk yang banyak digunakan dalam pertanian. Namun efisiensi penyerapan urea untuk tanaman saat ini hanya berkisar 30%. Oleh karena itu, untuk meningkatkan penyerapannya pada tanaman maka perlu dilakukan pengendalian pelepasan urea dengan membuatnya menjadi pupuk Slow Release Fertilizer (SRF). Penggunaan SRF diharapkan dapat mengendalikan pelepasan unsur nutrisi sesuai dengan waktu dan jumlah yang dibutuhkan tanaman. Bahan alami yang berpotensi sebagai matriks dari pupuk SRF ialah limbah ampas kopi. Penelitian ini menghasilkan karbon dari limbah ampas kopi yang dapat digunakan sebagai matrik dalam pembuatan pupuk SRF urea. Dengan penambahan matrik dari karbon kopi diharapkan dapat memperlambat laju pelepasan urea ke alam. Sehingga proses penyerapan urea ke dalam tumbuhan akan menjadi lebih maksimal. Ampas kopi dipirolisis dengan variasi suhu pirolisis (400 – 600oC) menggunakan ZnCl2 sebagai activator. Nilai iodine number karbon ampas kopi yang dihasilkan menurun dengan naiknya suhu. Penambahan karbon ampas kopi mampu menghambat pelepasan urea dari 81,5% menjadi 26% selama 30 hari.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
Program Studi Teknik Kimia, Universitas Islam Indonesia
2020-04-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3097
10.31315/e.v17i1.3097
Eksergi; Vol 17, No 1 (2020); 11-14
Eksergi; Vol 17, No 1 (2020); 11-14
2460-8203
1410-394X
10.31315/e.v17i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3097/pdf
Copyright (c) 2020 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/9895
2024-02-19T03:56:25Z
eksergi:ART
driver
Effect of ZnO Addition on The Characteristics of Cotton Fabric in The Batik Fabric Dyeing Process
Fatimah, Siti
Kencana, Syaifunnisa Puspa
'Aarifah, Shofwatul
Eskani, Istihanah Nurul
Batik; Cotton Fabric; ZnO; Tensile Strength; Colorfastness
For centuries, batik fabric has been a part of Indonesian culture and is recognized by UNESCO as an Intangible Cultural Heritage of Humanity. Batik fabric is essential for daily use and has become a part of Indonesian people, e.g., birth to death ceremonies. Besides some advantages of batik fabric made from cotton, it also has disadvantages because it quickly grows bacterial. Hence, it is essential to develop antibacterial properties on batik fabrics. This study used ZnO as an antibacterial agent. The mechanical properties and the colorfastness of fabrics have been evaluated to study the effect of ZnO application. The results showed that applying ZnO affected the mechanical properties of batik fabric by increasing the tensile strength and elongation at break. The result also showed that the ZnO did not affect the colorfastness of rubber and light by the similar value of untreated batik fabric.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9895
10.31315/e.v20i3.9895
Eksergi; Vol 20, No 3 (2023); 210-213
Eksergi; Vol 20, No 3 (2023); 210-213
2460-8203
1410-394X
10.31315/e.v201i3
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9895/pdf
Copyright (c) 2023 Syaifunnisa Puspa Kencana, Siti Fatimah, Shofwatul 'Aarifah, Istihanah Nurul Eskani
oai:ojs.jurnal.upnyk.ac.id:article/377
2015-04-04T23:03:49Z
eksergi:ART
oai:ojs.jurnal.upnyk.ac.id:article/7542
2022-08-15T04:33:34Z
eksergi:ART
driver
Simulasi Siktus Refrijerasi Satu, Dua, dan Tiga Tahap dengan HYSYS 3.2.
Putranto, Aditya
Penggunøan sikus refriijerasi semakin meningkat dalam industri kimia untuk penyediaan chilled water. Pada makalah ini disimulasikan siklus refrijerasi satu tahap, dua tahap, dan tiga tahap dengøn HYSYS 3.2. Beberapa data dimasukkan agar tercapai derajat kebebasan (degree of freedom) sama dengan 0. Neraca massa dm energi terhìtung dengan bantuan sortware HYSYS 3.2. dan diamati profìl beban kondensor, kompresor, dan evaporator terhadap berbagai variable yang berpengaruh. Berdasarkan hasil simulasì, beban kondensor, evaporator dan kompresor dipengaruhi oleh tekanan kondensoi tekanan evaporstoti dan tekanan interstage.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7542
10.31315/e.v9i1.7542
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 1-5
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 1-5
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7542/pdf
Copyright (c) 2022 Aditya Putranto
oai:ojs.jurnal.upnyk.ac.id:article/2089
2018-01-05T06:37:49Z
eksergi:ART
driver
Design of Flow Control System with A Kickback Flow as A Manipulated Variable
Hermawan, Yulius Deddy
flow control; kickback; PI; Routh-Hurwitz; stable
The open loop experiment of water flow dynamic in pipe has been done in laboratory. Pump was used to flow water in pipe. Part of liquid from discard of pump was recycled back to the suction of pump (kickback) and adjusted to control the liquid flow to the next process. The open loop laboratory experiment produced the steady state parameters; they were discard flowrate =16.6 [L/min], kickback flowrate =5.8 [L/min], and liquid flowrate to the next process =10.8 [L/min]. These steady state parameters were then used as the initial value for closed loop simulation with computer programming. This study has proposed the liquid flow control configuration by manipulating the kickback flow. Proportional Integral (PI) was proposed to control the flow and Routh-Hurwitz (RH) stability criterion was chosen to predict the range of the controller gain (Kc) that gives stable response. The closed loop model was solved analytically with Laplace method for both servo and regulatory problems. The set point change of flow and disturbance were made based on step function. The scilab software was used to do closed loop simulation. Based on RH stability criterion, the controller gain should be negative in order to give stable response. The closed loop simulation showed that by using controller gain Kc=–0.5 and integral time constant tI=0.3 [min], stable and fast response with Integral Absolute Error (IAE) near to zero (0,0022) could be achieved.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2017-12-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2089
10.31315/e.v14i2.2089
Eksergi; Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 23-28
Eksergi; Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 23-28
2460-8203
1410-394X
10.31315/e.v14i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2089/pdf_24
oai:ojs.jurnal.upnyk.ac.id:article/8167
2023-04-10T03:14:43Z
eksergi:ART
driver
Conversion of Glycerol to Ethanol by Integrating Ultrasonic and Ni/ZSM-5 Catalyst
Putri, Devi Indrasari Mustopa
Sumari, Sumari
Darmokoesomo, Handoko
Supriyanto, Ganden
Nugroho, Nur Arief
Ni/ZSM-5; etanol; katalis; gliserol; ultrasonik
The increased production of biodiesel which is used as an alternative fuel has led to an increase in the by-product in the form of glycerol. This glycerol byproduct can be utilized by converting it into other compounds such as ethanol. The production of ethanol from glycerol requires a catalyst that can break down the molecular size of glycerol, one of which is zeolite. One type of zeolite that is good to use is ZSM-5, because this type of zeolite has a high degree of thermal stability, acid stability and selectivity. The catalytic properties of ZSM-5 can be improved by impregnating metals from the transition group, in this study using Ni (nickel). The results obtained that the catalyst Ni/ZSM-5 has a total acidity value of 0.920 mmol/g and has a specific surface area of 138.754 m2/g. The highest ethanol product was produced at 4 hours of sonication, which was 20.362%.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-03-02
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8167
10.31315/e.v20i1.8167
Eksergi; Vol 20, No 1 (2023); 1-7
Eksergi; Vol 20, No 1 (2023); 1-7
2460-8203
1410-394X
10.31315/e.v20i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8167/pdf
Copyright (c) 2023 Devi Indrasari Mustopa Putri
oai:ojs.jurnal.upnyk.ac.id:article/4497
2022-11-07T10:15:39Z
eksergi:ART
driver
Optimization of Coagulant Dosage for Suko River Water Treatment
aini, syarifah
Wahyudi, H.D.
Priyono, Kukuh
Jar Test; tawas; PAC; kaporit; kejernihan
Sungai Suko, Drono village, Ngawen sub-district, Klaten district, is located near residential area and tofu factory, the possibility of water contamination is quite high, which is caused by household waste. This river water can be processed into clean water by a coagulation process of the Jar Test method using coagulant alum, PAC and chlorine. The purpose of this study was to determine the optimum dose of coagulant in processing Suko river water into clean water using the Jar test method and knowing which coagulant is most suitable for processing the Suko river water into clean water. This research method is to use the Jar Test experiment to determine the optimum coagulant dose in processing Suko river water into clean water. The quality of the water samples before the experiment were tested which included the physical parameters, i.e. temperature, color, odor, and turbidity, also the chemical parameters, i.e. Fe, hardness, CO2, alkalinity, pH, COD, BOD, then the experimental results will determine the level of water clarity. The results showed that the optimum alum content in the experiment was 120 ppm by adding 6 mL of alum to 500 mL of water, the optimum level of PAC in the experiment is 200 ppm by adding 10 mL of PAC to 500 mL of water, and the optimum chlorine level in the experiment is 160 ppm by adding 8 mL of chlorine to 500 mL of water.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
Syarifah Aini
Widya Dharma University
Department of Civil Engineering
2021-04-23
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4497
10.31315/e.v0i0.4497
Eksergi; Vol 18, No 1 (2021); 1-6
Eksergi; Vol 18, No 1 (2021); 1-6
2460-8203
1410-394X
10.31315/e.v0i0
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4497/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/downloadSuppFile/4497/370
Copyright (c) 2021 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/335
2022-08-15T04:32:21Z
eksergi:ART
driver
Peluang dan Tantangan Komersialisasi Biodisel-Review
Mahreni, Mahreni
biodiesel; ultrasonic reactor; microalgae; alternative energy
Hydrogen is one of the environmentally friendly fuel, however hydrogen is not always available due to continuously increasing energy demand and fossil fuel availability become more limited. Gap between demand and supply is essential to find alternative fuels. Biodiesel could be a substituent for fossil fuels, especially for hydrogen. Biodiesel could be made by mixing vegetable oils or fats with fossil fuel with a ratio of (5-20) wt.% however in a long time effect of this mixture can damage the engine. To overcome the problem, biodiesel can be synthesized via transesterification of oil and alcohol with the aid of acid or base catalyst to produce glycerol and FAME (Fatty Acid Methyl Ester). Challenges faced for the commercialization of biodiesel among others, (1) expensive raw material (edible oil), (2) reaction time and separation of the relatively long time (minimum 15 hours), (3) the use of acid catalysts still leaves the problem of corrosion and corrosion of machine tools and pollution to the environment by the catalyst. To make biodiesel competitive in the market, used oil (waste cooking oils, WCO), agricultural waste, and recent studies using microalgae could be used as source of biodiesel production. To shorten the reaction time, reaction was carried out using ultrasonic reactor technology and to minimize environmental pollution to use the solid catalyst. This paper will summarize on the adoption of latest technologies in producing biodiesel from used frying oil and microalgae.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-11-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/335
10.31315/e.v10i2.335
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 15-26
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 15-26
2460-8203
1410-394X
10.31315/e.v10i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/335/285
oai:ojs.jurnal.upnyk.ac.id:article/7207
2022-11-18T06:48:30Z
eksergi:ART
driver
The Effect of Contact Time Variation and Dosage of NaOH-Activated Fly ash on Adsorption of Methylene Blue
Pengaruh Variasi Waktu Kontak dan Dosis Adsorben Fly ash teraktivasi NaOH terhadap Adsorpsi Metilen Biru
Morentera, Brilian Gema
Wahyuningsih, Sri
Sudarni, Dyan Hatining Ayu
absorbansi, adsorpsi, fly ash, metilen biru, spektrofotometri
A rapid growth of textile industry creates a new problems on environment, one of those is the presence of dye waste. Methylene blue is one of the dyes which is toxic to living things, one of those triggers cyanosis for human and bother photosyntesis of algae. Therefore, it needs the effort to reduce, one of those is by adsorption. This study aims to determined the effect of dosage adsorbent variation and contact time variation to adsorb methylene blue. Adsorption is an adsorbate molecule absorption process that occurs on the surface of the adsorbent. This study used fly ash from PG. Pagottan and has been activated by NaOH. Measure method of this study using UV-Vis Spectrophotometry to measure concentration of methylene blue at maximum wavelenght. Based on data, NaOH-activated fly ash and non-activated fly ash following Langmuir isotherm adsorption, it mean a monolayer site is formed. Adsorption capacity also increase after activation, it about 21,74 mg/g to 23, 25 mg/g. Based on the study fly ash has a potential as a new adsorbent.
Pertumbuhan industri menimbulkan masalah yang baru terhadap lingkungan salah satunya adalah adanya limbah warna. Metilen biru merupakan pewarna tekstil yang berbahaya bagi makhluk hidup salah satunya pemicu sianosis bagi manusia dan dapat mengganggu fotosintesis bagi tumbuhan air. Oleh karena itu perlu dilakukan upaya untuk mengatasi hal tersebutsalah satunya dengan adsorpsi.Metode adsorpsi menggunakan fly ash PG.Pagottan yang telah diaktivasi dengan NaOH 2M untuk menyerap metilen biru. Penelitian ini bertujuan untuk mengetahui pengaruh variasi massa adsoren dan variasi waktu kontak terhadap absorbansi metilen biru sebelum aktivasi dan sesudah aktivasi. Metode pengukuran menggunakan spektrofotometri UV-Vis Genesys-10. Hasil penelitian menunjukkn bahwa persen removal terbaik untuk penyerapan metilen biru dengan konsentrasi 0,03 g/L adalah fly ash Berdasarkan data dapat diketahui fly ash aktivasi dan non aktivasi mengikuti model isoterm Langmuir yang berarti terbentuk monolayer adsorpsi dengan R2 0,987dan R 2 0,677 untuk non aktivasi untuk aktivasi NaOH 2M. Kapasitas adsorbsi fly ash juga mengalami peningkatan setelah aktivasi yaitu 21,739 mg/gram menjadi 23, 255 mg/gram teraktivasi NaOH dengan dosis 0,2 gram selama 10 menit yang dapat mengadsorpsi sebesar 100%.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-11-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7207
10.31315/e.v19i3.7207
Eksergi; Vol 19, No 3 (2022); 104-109
Eksergi; Vol 19, No 3 (2022); 104-109
2460-8203
1410-394X
10.31315/e.v19i3
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7207/pdf
Copyright (c) 2022 Brilian Gema Morentera, Sri Wahyuningsih, Dyan Hatining Ayu Sudarni
oai:ojs.jurnal.upnyk.ac.id:article/2387
2022-03-29T08:23:53Z
eksergi:ART
driver
Production of Activated Carbon from Waste Rubber Tyres Pyrolisis
Pembuatan Karbon Aktif dari Hasil Pirolisis Ban Bekas
Setyoningrum, Tutik Muji
Setiawan, Agus
Pamungkas, Ganang
ban bekas; karbon aktif; aktivasi kimia
Currently, alternative renewable energy is needed, one of which is RCO (Rubber Compound Oil) oil which is made from waste tires. The making of RCO oil causes problems in the form of carbon waste which, if discharged, will cause environmental impacts. Efforts are needed to deal with kabon waste resulting from used tire pyrolysis, one of which is the creation of activated carbon to increase the economic value of waste. So the purpose of this study is to study the operating conditions in the manufacture of activated carbon from waste produced by used tire pyrolysis. Activated carbon is one of the absorbents that can be used in material purification. This study makes activated carbon using a chemical activation method. KOH was chosen as activating agent and the activation temperature variable was used with temperature variations of 700, 800, and 900 °C with activation times for 30, 45, and 60 minutes. In this study, the best activated carbon was obtained with 900 °C operating conditions for 60 minutes which produced an active carbon surface area of 230 m 2 /g.
ABSTRAK: Saat ini diperlukan alternatif energi baru terbarukan salah satunya minyak RCO (Rubber Compound Oil) yang dibuat dari bahan baku ban bekas. Pembuatan minyak RCO ini menimbulkan permasalahan berupa limbah karbon yang apabila dibuang akan menimbulkan dampak lingkungan. Diperlukan upaya untuk menangani limbah kabon hasil pirolisis ban bekas salah satunya adalah pembuatan karbon aktif guna meningkatkan nilai ekonomi limbah. Sehingga tujuan dari penelitian ini adalah untuk mempelajari kondisi operasi dalam pembuatan karbon aktif dari limbah hasil pyrolisis ban bekas. Karbon aktif merupakan salah satu adsorben yang dapat digunakan dalam pemurnian bahan. Penelitian ini membuat karbon aktif dengan menggunakan metode aktivasi kimia. KOH dipilih sebagai aktivating agent serta digunakan variabel suhu aktivasi dengan variasi suhu 700, 800, dan 900 °C dengan waktu aktivasi selama 30, 45, dan 60 menit. Pada penelitian ini diperoleh hasil karbon aktif terbaik dengan kondisi operasi 900 °C selama 60 menit yang menghasilkan luas permukaan karbon aktif seluas 230 m2/g.Kata Kunci: ban bekas, karbon aktif, aktivasi kimia ABSTRACT: Currently, alternative renewable energy is needed, one of which is RCO (Rubber Compound Oil) oil which is made from waste tires. The making of RCO oil causes problems in the form of carbon waste which, if discharged, will cause environmental impacts. Efforts are needed to deal with kabon waste resulting from used tire pyrolysis, one of which is the creation of activated carbon to increase the economic value of waste. So the purpose of this study is to study the operating conditions in the manufacture of activated carbon from waste produced by used tire pyrolysis. Activated carbon is one of the absorbents that can be used in material purification. This study makes activated carbon using a chemical activation method. KOH was chosen as activating agent and the activation temperature variable was used with temperature variations of 700, 800, and 900 °C with activation times for 30, 45, and 60 minutes. In this study, the best activated carbon was obtained with 900 °C operating conditions for 60 minutes which produced an active carbon surface area of 230 m2/g.Keywords: waste tyres, activated carbon, chemical activation
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2018-11-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2387
10.31315/e.v15i2.2387
Eksergi; Vol 15, No 2 (2018): Vol. 15 No.2 (2018); 54-58
Eksergi; Vol 15, No 2 (2018): Vol. 15 No.2 (2018); 54-58
2460-8203
1410-394X
10.31315/e.v15i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2387/pdf
Copyright (c) 2018 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/9596
2023-09-13T07:41:49Z
eksergi:ART
driver
Modified Polyethersulfone (PES) Membran Methods to Improve Anti-fouling −Mini Review
Metode Modifikasi Membran Polietersulfon (PES) Untuk Meningkatkan Antifouling−Mini Review Modifikasi Membran
Nurmalasari, Enny
Ulia, Hasnah
Aini, Apsari Puspita
Yahya, Agung Kurnia
Fahni, Yunita
Membran PES; Modifikasi; Coating; Grafting; Pencampuran
Polyethersulfone (PES) is the most common material in various medical and water treatment applications because of its excellent mechanical and thermal properties. The hydrophobicity of polyethersulfone is considered as one of the main drawbacks because the hydrophobic surface causes a high biofouling effect on the membrane, so it has limitations in using Polietersulfon PES membrane technology. Modification of PES membranes is an important topic to be continuously developed to improve the properties of PES membranes. Membrane modifications focus on increasing the hydrophilicity, selectivity, and stability of membranes that are expected to be used commercially. Modifications were made to change the hydrophobic membrane surface into a hydrophilic membrane with good mechanical properties by introducing hydrophilic properties and functional groups to the polyethersulfone membrane surface. This review includes reviews and discussions on modifying PES membranes by mixing, coating, and grafting methods. In particular, adding functional groups to polyethersulfone is a suitable method for introducing hydrophilic properties. The addition of nanomaterials to the surface of the polyethersulfone membrane by mixing, coating, grafting, and combinations significantly increases the surface of the membrane, and all modifications affect the surface roughness of the membrane.
ABSTRAK: Polyethersulfone telah banyak digunakan sebagai bahan yang paling umum dalam berbagai aplikasi medis, pengolahan air karena sifat mekanik dan termal yang sangat baik. Hidrofobisitas Polietersulfon dianggap sebagai salah satu kelemahan utama karena permukaan hidrofobik menyebabkan efek biofouling pada membran tinggi sehingga memiliki keterbatasan dalam penggunaan teknologi membran PES. Modifikasi membran PES menjadi bahasan yang penting untuk terus dikembangkan untuk memperbaiki sifat membran PES. Modifikasi membran fokus pada peningkatan hidrofilitas, selektifitas, dan kestabilan membran yang diharapkan dapat digunakan secara komersial. Modifikasi dilakukan untuk mengubah permukaan membran yang hidrobik menjadi membran hendrofilik yang memiliki sifat mekanik yang baik dengan pendekatan perkenalan sifat hidrofilik dan kelompok fungsional ke permukaan membran Polietersulfon. Review ini meliputi ulasan dan pembahasan modifikasi membran PES dengan metode pencampuran, coating, dan grafting. Secara khusus, penambahan kelompok fungsional untuk Polietersulfon digunakan sebagai metode yang baik untuk memperkenalkan sifat hidrofilik. Penambahan Nanomaterials ke permukaan membran Polietersulfon secara pencampuran, coating, grafting, dan gabungan memberikan pengaruh yang cukup signifikan terhadap peningkatan permukaan membran dan seluruh modifikasi mempengaruhi kekasaran permukaan membran.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-07-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9596
10.31315/e.v20i2.9596
Eksergi; Vol 20, No 2 (2023); 64-75
Eksergi; Vol 20, No 2 (2023); 64-75
2460-8203
1410-394X
10.31315/e.v20i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9596/pdf
Copyright (c) 2023 Enny Nurmalasari, Hasnah Ulia, Apsari Puspita Aini, Agung Kurnia Yahya, Yunita Fahni
oai:ojs.jurnal.upnyk.ac.id:article/4536
2023-01-15T05:33:09Z
eksergi:ART
driver
Study of the activity of activated carbon impregnated with Fe2O3 as a biosorbent for methylene blue from wastewater
Uji Aktivitas Karbon Aktif Tongkol Jagung Terimpregnasi Fe2O3 sebagai Biosorben Limbah Warna Metilen Blue
Irfandy, Fauzan
Ristianingsih, Yuli
Istiani, Alit
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
Salah satu limbah warna yaitu metilen blue dapat memberikan dampak yang buruk terhadap lingkungan dan kesehatan. Salah satu upaya mengatasinya adalah dengan proses adsorpsi dengan karbon aktif. Biomasa yang potensial dikembangkan sebagai karbon aktif adalah tongkol jagung karena ketersediaanya yang melimpah. Tujuan dari penelitian ini adalah membuat karbon aktif dari tongkol jagung dan memodifikasi permukaanya dengan besi oksida (Fe2O3). Modifikasi ini dilakukan dengan tujuan karbon aktif terimpregnasi dapat memiliki daya tarik atau afinitas yang lebih baik terhadap metilen blue. Proses modifikasi dilakukan dengan wet impregnation method. Hasil dari karbon aktif terimpregnasi oksida besi (KAJ-Fe) kemudian diuji aktivitasnya terhadap metilen blue. Selain itu, pengaruh Ph pun ikut dipelajari dalam penelitian ini. Berdasarakan percobaan yang telah dilkukan terlihat bahwa pada range konsentrasi loading Fe yang digunakan (1-3%) menunjukkan bahwa Loading Fe dengan konsentrasi 2% memberikan hasil adsorpsi metilen blue yang paling optimal dimana kapasitas adsorpsinya sebesar 44.9%. Selain itu, pH asam pada metilen blue memberikan hasil adsorpsi yang lebih baik daripada Ph netral.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2021-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4536
10.31315/e.v0i0.4536
Eksergi; Vol 18, No 2 (2021); 89-92
Eksergi; Vol 18, No 2 (2021); 89-92
2460-8203
1410-394X
10.31315/e.v18i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4536/pdf
Copyright (c) 2021 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/664
2015-11-05T05:13:53Z
eksergi:ART
driver
Utilization of Lapindo Mud as Raw Material for Ceramic Roof Tile by Varying Burning Temperature
Pemanfaatan Lumpur Lapindo sebagai Bahan Baku Pembuatan Genteng Keramik dengan Variasi Suhu Pembakaran
Nuri, Wasir
Retno, Dyah Tri
Lapindo mud; roof tile; temperature.
Lumpur Lapindo; genteng; variasi suhu.
Lapindo mudflow issued a very large volume of mud. The mud flooded rice fields, residential and industrial area to date has not been stopped but the mud bursts untapped yet. Therefore, attempted use Lapindo mud very much it to be made tile. Sludge containing 55.4% silica oxide, alumina 16.1% and 8.9% iron with the composition of the possibility of mud can be created tile roof. Dried mud that has been mashed into the grain size of 80 mesh, then water added until plastic. Mud that has plastic printed with size 6 x 3 x 3 cm and then dried using ambient air. After the dried samples were burned using a furnace at temperatures varying from 500 to 900oC, after chilling the samples tested compressive strength, fracture modulus and water absorption. The results showed that the higher the combustion temperature obtained greater compressive strength and less water absorption. Most compressive strength is 142 kg/cm2and smallest water absorption is 0.06 g/cm2at a temperature of 900oC. At combustion temperatures of 500 to 700oC fracture modulus down from 72.78 to 41.81 kg/cm2 while at 700 to 900oC fracture modulus rose to 126.7 kg/cm2. The best results obtained on the combustion temperature at 800oC with fracture modulus 103.18 kg/cm2 and water absorption 0.08 g/cm2. These results satisfy roof tile as type I according SII.0027 UDC-81. 666.74.
Semburan lumpur Lapindo mengeluarkan lumpur yang volumenya sangat besar. Lumpur tersebut menggenangi areal persawahan, pemukiman dan kawasan industry sampai saat ini semburan belum berhenti tetapi lumpur belum dimanfaatkan. Oleh sebab itu dicoba memanfaatkan lumpur Lapindo yang sangat banyak itu untuk dibuat genteng. Lumpur mengandung oksida silika 55,4 %, alumina 16,1 % dan besi 8,9 % dengan komposisi tersebut kemungkinan lumpur dapat dibuat genteng. Lumpur yang sudah kering dihaluskan menjadi ukuran butir 80 mesh selanjutnya ditambah air sampai plastis. Lumpur yang sudah plastis dicetak dengan ukuran 6 x 3 x 3 cm kemudian dikeringkan menggunakan udara sekitar. setelah kering sampel dibakar menggunakan furnance pada suhu bervariasi mulai 500 sampai 900oC, setelah dingin sampel diuji kuat tekan, modulus patah dan daya serap terhadap air. Hasil penelitian menunjukkan bahwa semakin tinggi suhu pembakaran diperoleh kuat tekan yang semakin besar dan daya serap air semakin kecil. Kuat tekan paling besar142 kg/cm2 dan daya serap air paling kecil 0,06 g/cm2 pada suhu 900oC. Pada suhu pembakaran 500 sampai 700oC modulus patah turun dari 72,78 menjadi 41,81 kg/cm2 sedangkan pada 700 sampai 900OC modulus patah naik menjadi 126,7kg/cm2. Hasil terbaik diperoleh pada suhu pembakaran 800oC dengan modulus patah sebesar 103,18 kg/cm2 dan daya serap air 0,08 g/cm2 . Hasil tersebut memenuhi sarat sebagai genteng tipe I menurut SII.0027-81 UDC. 666.74.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2015-07-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/664
10.31315/e.v12i1.664
Eksergi; Vol 12, No 1 (2015); 08-11
Eksergi; Vol 12, No 1 (2015); 08-11
2460-8203
1410-394X
10.31315/e.v12i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/664/pdf_10
oai:ojs.jurnal.upnyk.ac.id:article/3082
2022-11-07T10:32:57Z
eksergi:ART
driver
Characteristics of Porous Hydroxyapatite from Precursors of Rice Conch Shells and Porogeneous Materials of Breadfruit
Karakteristik Hidroksiapatit Porous dari Prekursor Cangkang Keong Sawah dan Bahan Porogen Pati Sukun
Sulistyawati, Endang
Siregar, Robertinus Filustra Siregar
Biomaterial;Buah Sukun;Hidroksiapatit;Pori;Cangkang
Hydroxyapatite [Ca10(PO)4(OH)2] is a biomaterial used in bone implants to repair damaged tissue bones. Hydroxyapatite has biocompatible and osteoconductive properties. Hydroxyapatite synthesis is carried out by reacting Ca and P with a mole ratio of 1,67. One source of calcium precursors is conch shell with a CaCO3 content of 48,02%. The addition of porogen breadfruit starch serves to form pores so that it can accelerate the process of nutrient infiltration in bone. The study began with the calcination of conch shells at 900oC for 4 hours, to obtain calcium oxide (CaO) compounds. Calcium and phosphate reactions were carried out at 60oC and the stirring time was 3 hours. The hydroxyapatite produced was sintered at 900oC for 4 hours and analyzed using FTIR, AAS, UV-VIS, SEM, XRD, and compressive strength. The analysis solid and porous hydroxyapatite showed a comparison of calcium and phosphorus respectively 1.677 and 1.673, so that hydroxyapatite was close to the hydroxyapatite standard. Hydroxyapatite dense has a particle size of 0.396 μm, while porous hydroxyapatite has a particle size of 0.9135 μm and a pore of 0.655 μm. Hydroxyapatite dense and porous compressive strength are 19.61 MPa and 9,807 MPa respectively, so porous hydroxyapatite is more effective in nutrient infiltration to repair bone damage.
Hidroksiapatit [Ca10(PO)4(OH)2] adalah biomaterial yang digunakan dalam bone graft implan tulang untuk memperbaiki jaringan-jaringan yang rusak dan tulang yang patah. Hidroksiapatit memiliki sifat biokompatibel dan osteokonduktif. Sintesis hidroksiapatit dilakukan dengan mereaksikan Ca dan P dengan perbandingan mol 1,67. Salah satu sumber prekursor kalsium adalah cangkang keong dengan kandungan CaCO3 53,10%. Penambahan bahan porogen pati sukun berfungsi untuk membentuk pori sehingga dapat mempercepat proses infiltrasi nutrisi pada tulang. Penelitian diawali dengan proses kalsinasi cangkang keong pada suhu 900oC selama 4 jam, untuk mendapatkan senyawa kalsium oksida (CaO). Reaksi kalsium dan posfat dilakukan pada suhu 60oC dan variasi waktu stirring 3 jam. Hidroksiapatit yang dihasilkan disintering pada suhu 900oC dengan waktu 4 jam dan dianalisis kualitas dan morfologinya menggunakan FTIR, AAS, UV-VIS, SEM, XRD, dan kuat tekan. Hasil analisis menunjukkan perbandingan kalsium dan fosfor untuk hidroksiapatit dense dan porous masing-masing 1,677 dan 1,673, sehingga hidroksiapatit mendekati hidroksiapatit standar. Hidroksiapatit dense memiliki ukuran partikel 0,396 µm, sedangkan hidroksiapatit porous memiliki ukuran partikel 0,9135 µm dan pori 0,655 µm. Kuat tekan hidroksiapatit dense dan porous masing-masing 19,61 MPa dan 9,807 MPa, sehingga hidroksiapatit porous lebih efektif dalam infiltrasi nutrisi untuk memperbaiki kerusakan tulang.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2019-11-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3082
10.31315/e.v16i2.3082
Eksergi; Vol 16, No 2 (2019); 59-63
Eksergi; Vol 16, No 2 (2019); 59-63
2460-8203
1410-394X
10.31315/e.v16i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3082/pdf
Copyright (c) 2019 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/9269
2024-02-19T03:56:25Z
eksergi:ART
driver
Decreasing Of Oxalate Content in Porang Based on Different Sample Shape, Soaking Time, Temperature, and Soaking Solutions
Sugiarto, Bambang
Sulistyowati, RR Endang
Dewi, Cicilia Tri Marantika
Hendranto, Rahadian Yogi
tuber ; porang ; content ; oxalate ; reduction
Porang, known for its high oxalate content that poses digestive challenges, served as the underlying problem in this study. The research investigated the impact of immersion conditions on oxalate reduction in porang, both in the form of longitudinal slices and diced pieces, using various soaking media, including vinegar, alcohol, and water, with temperature variations. The study identified that the optimal immersion time for achieving maximum oxalate reduction in longitudinal slices was 150 minutes at 50°C in water, resulting in a 0.00495% decrease. In the case of diced porang, the most significant reduction occurred after 120 minutes at 70°C in alcohol, leading to a 0.0045% decrease. These findings shed light on the influence of porang shape and soaking conditions on oxalate release, with diced porang demonstrating faster oxalate reduction, likely due to its smaller surface area. The study offers valuable insights into effectively reducing oxalate levels in porang, contributing to safer consumption.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9269
10.31315/e.v20i3.9269
Eksergi; Vol 20, No 3 (2023); 178-183
Eksergi; Vol 20, No 3 (2023); 178-183
2460-8203
1410-394X
10.31315/e.v201i3
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9269/pdf
Copyright (c) 2023 Cicilia Tri MD
oai:ojs.jurnal.upnyk.ac.id:article/315
2014-10-10T23:44:13Z
eksergi:ART
oai:ojs.jurnal.upnyk.ac.id:article/7245
2022-11-07T10:12:47Z
eksergi:ART
driver
Comparison of the Use of NaOH and KOH Activators in the Manufacture of Activated Carbon from Cassava Peel (Manihot utilissima)
Puspitasari, Mitha
Nandari, Wibiana Wulan
Hadi, Faizah
activator , NaOH, KOH , activated carbon, peel, cassava
Cassava (Manihot utilissima) is a staple food beside rice and corn for Indonesia people. Cassava peel is a waste of cassava processing agroindustries such as tapioca flour industry, fermentation industry, and staple food industry. This waste contains a fairly high carbon element of 59,31%. Cassava peel has the potential to be used as raw material for activated carbon because of its high carbon content. Activated carbon production involved some steps such as preparing raw materials, carbonization, activation, neutralization, and analysis of water content, ash, iodine number, and analysis of the pore surface area of activated carbon. Activated carbon was activated using NaOH and KOH with concentrations of 0.1; 0,2; 0,3; 0,4; and 0,5N. The results showed that activated carbon which activated with 0,4N NaOH and 0,5N KOH provided the closest parameter with SNI 06-3730-1995 standard. The use of NaOH activator can increase the surface area of activated carbon compared to KOH activator.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-28
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7245
10.31315/e.v19i2.7245
Eksergi; Vol 19, No 2 (2022); 58-62
Eksergi; Vol 19, No 2 (2022); 58-62
2460-8203
1410-394X
10.31315/e.v19i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7245/pdf
Copyright (c) 2022 Mitha Puspitasari
oai:ojs.jurnal.upnyk.ac.id:article/1919
2017-08-03T15:02:24Z
eksergi:ART
driver
Pengaruh Limbah Industri Batik Menggunakan Pewarna Alami dari Desa Wukirsari terhadap Viabilitas Bakteri Tanah
Pengaruh Limbah Industri Batik Menggunakan Pewarna Alami dari Desa Wukirsari terhadap Viabilitas Bakteri Tanah
Ratih, Yanisworo Wijaya
limbah pewarna alam viabilitas bakteri
Industri batik menggunakan pewarna alami sedang berkembang. Pewarna alami diperoleh dengan melakukan ekstraksi pada beberapa tanaman seperti jolawe (Terminalia bellirica), mahoni (Swieteniamacrophylla mahoni) dan indigo (Indigofera tinctoria). Beberapa tanaman penghasil pewarna alami sering digunakan sebagai antibiotik alami karena mampu menghambat pertumbuhan mikrobia. Kemampuan senyawa tersebut menghambat pertumbuhan mikrobia perlu diwaspadai karena ada kemungkinan bahwa paparannya dalam tanah dapat mengurangi populasi mikrobia. Penelitian ini mempunyai tujuan untuk mengetahui pengaruh limbah industri batik pewarna alami terhadap viabilitas bakteri tanah. Pengujian viabilitas sel dilakukan dengan mengamati pertumbuhan bakteri total, penambat nitrogen dan pelarut fosfat dalam tanah yang ditambah dengan masing-masing limbah jolawe, indigo, mahoni dan limbah pewarna campuran. Limbah dan tanah yang digunakan berasal dari desa Wukirsari, Imogiri, Kabupaten Bantul, DIY. Dilakukan pula karakterisasi terhadap limbah dan tanah yang digunakan. Parameter utama yang diamati meliputi jumlah sel bakteri total, penambat nitrogen dan pelarut fosfat, pH, serta kadar fenolik dan flavonoid. Jumlah bakteri total, penambat nitrogen dan pelarut fosfat diamati dengan metode taburan berturut-turut dalam media nutrien agar, Jensen’s dan Pikovskaya, sedangkan fenolik dan flavonoid dianalisis menggunakan metode spetrofotometrik. Hasil penelitian menunjukkan bahwa limbah meningkatkan pH tanah dari 5 menjadi 6,7. Kadar flavonoid dan fenolik limbah berturut-turut berkisar antara 0,14% sampai dengan 0,70% dan 0,18% sampai dengan 1,76%. Viabilitas sel bakteri tidak dipengaruhi oleh kadar flavonoid dan fenolik limbah. Pada umumnya limbah batik pewarna alami tidak menurunkan viabilitas bakteri tanah.
Industri batik menggunakan pewarna alami sedang berkembang. Pewarna alami diperoleh dengan melakukan ekstraksi pada beberapa tanaman seperti jolawe (Terminalia bellirica), mahoni (Swieteniamacrophylla mahoni) dan indigo (Indigofera tinctoria). Beberapa tanaman penghasil pewarna alami sering digunakan sebagai antibiotik alami karena mampu menghambat pertumbuhan mikrobia. Kemampuan senyawa tersebut menghambat pertumbuhan mikrobia perlu diwaspadai karena ada kemungkinan bahwa paparannya dalam tanah dapat mengurangi populasi mikrobia. Penelitian ini mempunyai tujuan untuk mengetahui pengaruh limbah industri batik pewarna alami terhadap viabilitas bakteri tanah. Pengujian viabilitas sel dilakukan dengan mengamati pertumbuhan bakteri total, penambat nitrogen dan pelarut fosfat dalam tanah yang ditambah dengan masing-masing limbah jolawe, indigo, mahoni dan limbah pewarna campuran. Limbah dan tanah yang digunakan berasal dari desa Wukirsari, Imogiri, Kabupaten Bantul, DIY. Dilakukan pula karakterisasi terhadap limbah dan tanah yang digunakan. Parameter utama yang diamati meliputi jumlah sel bakteri total, penambat nitrogen dan pelarut fosfat, pH, serta kadar fenolik dan flavonoid. Jumlah bakteri total, penambat nitrogen dan pelarut fosfat diamati dengan metode taburan berturut-turut dalam media nutrien agar, Jensen’s dan Pikovskaya, sedangkan fenolik dan flavonoid dianalisis menggunakan metode spetrofotometrik. Hasil penelitian menunjukkan bahwa limbah meningkatkan pH tanah dari 5 menjadi 6,7. Kadar flavonoid dan fenolik limbah berturut-turut berkisar antara 0,14% sampai dengan 0,70% dan 0,18% sampai dengan 1,76%. Viabilitas sel bakteri tidak dipengaruhi oleh kadar flavonoid dan fenolik limbah. Pada umumnya limbah batik pewarna alami tidak menurunkan viabilitas bakteri tanah..Kata Kunci: limbah; pewarna alam; viabilitas; bakteri
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
UPN Veteran Yogyakarta
UPN Yogyakarta
2016-12-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1919
10.31315/e.v13i2.1919
Eksergi; Vol 13, No 2 (2016); 7-13
Eksergi; Vol 13, No 2 (2016); 7-13
2460-8203
1410-394X
10.31315/e.v13i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1919/pdf_17
oai:ojs.jurnal.upnyk.ac.id:article/7826
2022-11-18T06:48:30Z
eksergi:ART
driver
Potency of Alluvial Mineral of Luk Ulo River with XRD and AAS in Kebakalan Village Kebumen
Nursanto, Edy
Pratiwi, Afroza
Winarno, Eddy
Sugiarto, Bambang
Mirahati, Riria Zendy
potential;mineral;alluvial;XRD;AAS
Based on petrographic data, XRD, and fluid inclusions, it was interpreted that the quartz veins associated with low sulfide in Karangsambung area underwent 2 stages of system change from mesothermal system to epithermal system. This means showing the mineral potential contained in material, including on the Luk Ulo River where alluvial deposits are present. Therefore, what needs to be done next is to determine the composition of the material of the alluvial material in the Luk Ulo River, Kebakalan Village using XRD, and AAS so that its potential is known. This research is limited to mineral potential in XRD and AAS (Au, Ag, and Cu) in 2 samples, A (sand) and B (rock). XRD results on samples A and B showed that quartz (SiO2) had the highest percentage (30-50%) compared to other minerals. While the results of the AAS tests showed that the highest Au and Ag contents were in sample B and Cu in sample A with total of 19.30 g/ton Au, 8.67 g/ton Ag, and 62.88 g/ton Cu. Meanwhile, the lowest total Au and Ag were in sample A and Cu was in sample B which amounted to Au 11.32 g/ton, Ag 8.67 g/ton, and Cu 34.86 g/ton.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
LPPM
University of Pembangunan Nasional Veteran Yogyakarta
2022-11-13
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7826
10.31315/e.v19i3.7826
Eksergi; Vol 19, No 3 (2022); 134-139
Eksergi; Vol 19, No 3 (2022); 134-139
2460-8203
1410-394X
10.31315/e.v19i3
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7826/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/downloadSuppFile/7826/1131
http://jurnal.upnyk.ac.id/index.php/eksergi/article/downloadSuppFile/7826/1132
http://jurnal.upnyk.ac.id/index.php/eksergi/article/downloadSuppFile/7826/1133
http://jurnal.upnyk.ac.id/index.php/eksergi/article/downloadSuppFile/7826/1134
Copyright (c) 2022 Afroza Pratiwi, Edy Nursanto, Eddy Winarno, Bambang Sugiarto, Riria Zendy Mirahati
oai:ojs.jurnal.upnyk.ac.id:article/3758
2022-11-07T10:29:53Z
eksergi:ART
driver
Bioceramic Hydroxiapatite (HAp) Made From Anodonta nuttaliana Clams Shells from Poso Lake
Biokeramik Hidroksiapatit (HAp) Berbahan Dasar Cangkang Tiram Anodonta nuttaliana dari Danau Poso
Gintu, Agung Rimayanto
Kristiani, Elizabeth Betty Elok
Martono, Yohanes
Biokeramik, Cangkang, Hidroksiapatit, Jaringan Keras
Bioceramic Hydroxyapatite (HAp) was a derivated chemical synthetic compound from calcium phosphate commonly used to care the damage of hard tissues. Bioceramic Hydroxyapatite can synthetized from the compounds which rich with calcium contains. In this study threated the synthesis and physicochemical characterization to the HAp made from Anodonta nuttaliana clam shells obtained from Poso lake. From the characterization of the sample A. nuttaliana shells obtained the water contains 0,50±0,00%; ash contains 0,9827±0,0022g/g; potasium 0,00135±0,0002g/g; calcium 0,0165±0,0034g/g; phosphate 0,1920±0,0424g/g and the ratio of Ca/P 1,9389±0,3039%. The synthesis of HAp by base precipitation method showed the yield of synthesis 95,4320±0,7085% with the characteristic of the HAp showed that the potassium contains 0,0005±0,00004g/g; calcium 0,95476±0,0012g/g; phosphate 0,528±0,0075; ratio of Ca/P 1,0307±0,0932%; porosity 73,9598±1,1320%; swelling ability 9,6067±2,5365%; and biodegradability 8,8206±0,2176%. From the overall results concluded that the A. nuttaliana clam shells was very potential to became a source of Bioceramic Hydroxyapatite (HAp).
Biokeramik Hidroksiapatit (HAp) merupakan suatu komponen kimiawi sintetik dari turunan kalsium fosfat yang umumnya digunakan untuk memperbaiki kerusakan jaringan keras. Biokeramik Hidroksiapatit dapat disintesis dari bahan-bahan yang kaya akan kalsium. Pada penelitian ini dilakukan sintesis dan karakterisasi fisikokima HAp dari cangkang tiram Anodonta nuttaliana yang diperoleh dari danau Poso, Sulawesi tengah. Dari hasil karakterisasi sampel cangkang tiram A. nuttaliana diperoleh kadar air 0,50±0,00%; kadar abu 0,9827±0,0022g/g; kadar kalium 0,00135±0,0002g/g; kalsium 0,0165±0,0034g/g; fosfat 0,1920±0,0424g/g dan rasio Ca/P 1,9389±0,3039%. Sintesis HAp dengan metode pengendapan basa menunjukkan yield sintesis sebesar 95,4320±0,7085% dengan karakteristik HAp yang dihasilkan menunjukkan kadar kalium 0,0005±0,00004g/g; kalsium 0,9476±0,0012g/g; fosfat 0,528±0,0075; rasio Ca/P 1,0307±0,0932%; porositas 73,9598±1,1320%; daya kembang 9,6067±2,5365%; dan biodegradabilitas 8,8206±0,2176%. Dari keseluruhan hasil disimpulkan bahwa cangkang tiram A. nuttaliana sangat potensial untuk dijadikan sumber biokeramik hidroksiapatit (HAp).
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
Faculty of Biology, Master of Biology Departement, Satya Wacana Christian University
2020-12-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3758
10.31315/e.v17i2.3758
Eksergi; Vol 17, No 2 (2020); 86-92
Eksergi; Vol 17, No 2 (2020); 86-92
2460-8203
1410-394X
10.31315/e.v17i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3758/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/downloadSuppFile/3758/230
Copyright (c) 2020 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/10025
2024-03-29T04:05:28Z
eksergi:ART
driver
Investigasi Efisiensi Penghambatan Korosi Senyawa Quinoxaline Berbasis Machine Learning
Adiprasetya, Vicenzo Frendyatha
Akrom, Muhamad
Trisnapradika, Gustina Alfa
Korosi, inhibitor, machine learning, quinoxaline.
Korosi memberikan kekhawatiran serius bagi sektor industri dan akademik karena mempunyai dampak negatif yang signifikan terhadap sejumlah bidang, termasuk perekonomian, lingkungan, masyarakat, industri, keamanan, dan keselamatan. Saat ini, banyak peminat topik pengendalian kerusakan bahan berbasis molekul organik. Quinoxaline mempunyai potensi sebagai inhibitor korosi karena tidak beracun, mudah diproduksi, dan efektif dalam berbagai kondisi korosif. Mengeksplorasi kemungkinan kandidat penghambat korosi melalui penelitian eksperimental adalah proses yang memakan waktu dan sumber daya yang intensif. Dengan menggunakan pendekatan machine learning (ML) berdasarkan model quantitative structure-property relationship (QSPR), kami mengevaluasi beragam algoritma linier dan non-linier sebagai model prediktif nilai corrosion inhibition efficiency (CIE) dalam penelitian ini. Kami menemukan bahwa, untuk kumpulan data senyawa quinoxaline, model non-linier Gradient Boosting Regressor (GBR) mengungguli keseluruhan model linier dan non-linier, serta hasil dari literatur dalam hal kinerja prediksi berdasarkan metrik root mean squared error (RMSE), mean squared error (MSE), mean absolute deviation (MAD), mean absolute percentage error (MAPE) dan coefficient of determination (R2). Secara keseluruhan, penelitian kami memberikan sudut pandang baru tentang kapasitas model ML untuk memperkirakan kemampuan penghambatan korosi pada permukaan besi oleh senyawa organik quinoxaline.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2024-03-23
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10025
10.31315/e.v21i2.10025
Eksergi; Vol 21, No 2 (2024); 65-69
Eksergi; Vol 21, No 2 (2024); 65-69
2460-8203
1410-394X
10.31315/e.v21i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10025/pdf
Copyright (c) 2024 Muhamad Akrom
oai:ojs.jurnal.upnyk.ac.id:article/328
2014-12-07T17:16:00Z
eksergi:ART
driver
Pembuatan Surfaktan Berbahan Dasar Jerami Padi
Murni, Sri Wahyu
lignosulfonate; surfactant; rice straw; emulsion; lignin.
Indonesia's oil production has declined due to the low level of production of oil wells that have been old. Extraction of oil from the wells can be enhanced by the injection of surfactant. Potential raw material for the manufacture of surfactants, especially the waste material so that lower-priced. This material include lignocellulosic materials and plantation agricultural waste. Rice straw is one of them. This study aims to make surfactants from rice straw. The axpetriment was conducted through the steps of: (1) preparation of raw materials, (2) delignification and isolation of lignin, (3) sulfonation of lignin using NaHSO3 . Delignification of rice straw held at a temperature of 166o C and a pressure of 1.2 atm. Sulfonated of lignin conducted at a temperature of 90-95°C and pH 7. Lignin and sodium lignosulfonate tested using FTIR and gravimetric. The results show at 2.5 g lignin, weight percent of NaHSO3 60% of the weight of lignin, pH 7, temperature 90-95 ° C for 4 hour reaction obtained 2,5509 g of sodium lignosulfonate (SLS). Sodium lignosulfonate is soluble in water. Sodium lignosulfonate phase behavior test using crude oil from Oil Drilling Tanjung, South Kalimantan, at the surfactant concentration 3000 and 5000 ppm result that the type of emulsion is water in oil. So that this surfactant not suggested for EOR.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-10-29
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/328
10.31315/e.v11i1.328
Eksergi; Vol 11, No 1; 43-49
Eksergi; Vol 11, No 1; 43-49
2460-8203
1410-394X
10.31315/e.v11i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/328/280
oai:ojs.jurnal.upnyk.ac.id:article/7555
2022-08-15T04:33:34Z
eksergi:ART
driver
Oksidasi Larutan Kalium Thiosulfat dalam Ekstrak Abu Tandan Sawit dengan Udara
Haryono, Gogot
Potossium sulphate is a kínd offertilizer whích nowadrys is still imported. The efortþr producing itfromdiferentfeedstockwås irwestigatedby many researchers. ThÍs researchwas an ahernativeway toproducepotassium sulphatefrom ash of empty palm-bunch. This objective ofthis researchwas particularly to studythe kinetic ofoxidationreaction ofpotassium sulphate productionfrom actract of ash ofempty palm-bunch,The æperíment was conducted by/ìlling the reactor with a potassium thiosulphate solution and thereþrebubbling air from bottom of the reactor with specitìed flow røe until steady condition was attained Theproductwas ønd analyzed at several certain time intervals. Iodometric methodwas appliedþr thiosulplwteanalysis and grartimetric method for sulphate analysis The øcperimental results showed that oxidationreaction rate of thiosulphate to sulphate was controlled by the reaction step, Temperature dependence ofthe rate constant consìdered by Arrhenius'
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7555
10.31315/e.v9i1.7555
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 60-64
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 60-64
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7555/pdf
Copyright (c) 2022 Gogot Haryono
oai:ojs.jurnal.upnyk.ac.id:article/2249
2022-03-29T08:12:31Z
eksergi:ART
driver
Degradation of Direct Dyes Waste by Advanced Oxidation Processes (AOPs) Method of H2O2/MnO2 Combination with BOD, COD, and pH as The Test Parameters
Degradasi Limbah Zat Warna Direk Dengan Metode Advanced Oxidation Processes (AOPs) Kombinasi H2O2/MnO2 dengan Parameter Uji BOD, COD dan pH
Augustia, Venitalitya Alethea Sari
Lestari, Inggit Dwi
Rani, Maulita Dian
AOPs; degradasi; H2O2/MnO2; limbah tekstil; zat warna direk
Advanced Oxidation Processes (AOPs) method has been applied and is growing in number of textile wastewater treatment. Textile industries are commonly using synthetic dyes in the dyeing process and will produce coloured-wastewater that is still contain of organic compound and is hard to be degraded. One of most frequently used synthetic dyes in textile industries is direct dyes. Direct dyes wastewater consists of azo bound whereby difficult to eliminate the colour and the concentration itself, thus an appropriate treatment such as AOPs is considered. The AOPs process to degrade direct dyes wastewater in this research uses a combination of H2O2 with catalyst MnO2. Parameter variation that carried out, are the variation of the ratio of wastewater and H2O2 volume, namely 1:1; 2:1 and 1:2. Whilst the using of mass of catalyst MnO2 is 1 g for each sample variation, namely 1 g for 250 ml and 500 ml H2O2. The results obtained after the BOD, COD and pH tests, are 230 mg/l, 784 mg/l and 5,26 respectively. This result is showed by the sample with variation 2:1 which is delivering the lowest values of BOD, COD and pH amongst the three sample variations mentioned
ABSTRAK: Metode AOPs (Advanced Oxidation Processes) telah banyak digunakan dan semakin berkembang untuk diaplikasikan pada pengolahan limbah tekstil. Perusahaan tekstil biasanya menggunakan zat warna sintetis dan menghasilkan limbah berwarna yang masih mengandung senyawa organik dan sulit untuk didegradasi. Salah satu zat warna yang paling sering digunakan adalah zat warna direk. Limbah zat warna direk mengandung ikatan azo yang sulit untuk didegradasi sehingga membutuhkan penanganan yang tepat seperti dengan metode AOPs. Proses AOPs untuk mendegradasi zat warna direk pada penelitian ini menggunakan kombinasi larutan H2O2 dengan katalis MnO2. Parameter yang dilakukan antara lain variasi perbandingan volume limbah dengan larutan H2O2 50% yaitu 1:1; 2:1 dan 1:2. Sedangkan massa MnO2 yang digunakan adalah 1 g untuk setiap variasi perbandingan yang dilakukan, yaitu 1 g untuk 250 ml dan 500 ml larutan H2O2. Setelah dilakukan pengujian dengan parameter BOD, COD dan pH diperoleh hasil BOD, COD dan pH terendah pada sampel percobaan dengan variasi 2:1, yaitu sebesar 230 mg/l, 784 mg/l dan 5,26.Kata Kunci: AOPs; degradasi; H2O2/MnO2; limbah tekstil; zat warna direk ABSTRACT: Advanced Oxidation Processes (AOPs) method has been applied and is growing in number of textile wastewater treatment. Textile industries are commonly using synthetic dyes in the dyeing process and will produce coloured-wastewater that is still contain of organic compound and is hard to be degraded. One of most frequently used synthetic dyes in textile industries is direct dyes. Direct dyes wastewater consists of azo bound whereby difficult to eliminate the colour and the concentration itself, thus an appropriate treatment such as AOPs is considered. The AOPs process to degrade direct dyes wastewater in this research uses a combination of H2O2 with catalyst MnO2. Parameter variation that carried out, are the variation of the ratio of wastewater and H2O2 volume, namely 1:1; 2:1 and 1:2. Whilst the using of mass of catalyst MnO2 is 1 g for each sample variation, namely 1 g for 250 ml and 500 ml H2O2. The results obtained after the BOD, COD and pH tests, are 230 mg/l, 784 mg/l and 5,26 respectively. This result is showed by the sample with variation 2:1 which is delivering the lowest values of BOD, COD and pH amongst the three sample variations mentioned.Keywords: AOPs; degradation; direct dyes; H2O2/MnO2; textile wastewater
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2018-07-04
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2249
10.31315/e.v15i1.2249
Eksergi; Vol 15, No 1 (2018): Vol 15, No 1 (2018); 5-8
Eksergi; Vol 15, No 1 (2018): Vol 15, No 1 (2018); 5-8
2460-8203
1410-394X
10.31315/e.v15i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2249/pdf
Copyright (c) 2018 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/9864
2023-09-13T07:43:53Z
eksergi:ART
driver
Investigation of QSPR-Based Machine Learning Models in Pyrimidine Corrosion Inhibitors
Investigasi Model Machine Learning Berbasis QSPR pada Inhibitor Korosi Pirimidin
Akrom, Muhamad
Sutojo, Totok
machine learning; QSPR; corrosion; inhibition efficiency; pyrimidine
Since corrosion causes considerable losses in many fields, including the economy, environment, society, industry, security, and safety, it is a major concern for the industrial and academic sectors. Damage control of materials based on organic compounds is currently a field of great interest. Because it is non-toxic, affordable, and effective in a variety of corrosive situations, pyrimidine has potential as a corrosion inhibitor. It takes a lot of time and resources to carry out experimental investigations in the exploration of potential corrosion inhibitor candidates. In this study, we evaluate the gradient boosting regressor (GBR), support vector regression (SVR), and k-nearest neighbor (KNN) algorithms as predictive models for corrosion inhibition efficiency using a machine learning (ML) approach based on the quantitative structure-property relationship model (QSPR). Based on the metric coefficient of determination (R2) and root mean square error (RMSE), we found that the GBR model had the best predictive performance compared to the SVR and KNN models as well as models from the literature for pyrimidine compound datasets. Overall, our study offers a new perspective on the ability of ML models to predict corrosion inhibition of iron surfaces
Karena korosi menyebabkan kerugian yang cukup besar di banyak bidang, termasuk ekonomi, lingkungan, masyarakat, industri, keamanan, dan keselamatan, hal itu menjadi perhatian utama bagi sektor industri dan akademik. Pengendalian kerusakan material berbasis senyawa organik saat ini menjadi bidang yang banyak diminati. Karena tidak beracun, terjangkau, dan efektif dalam berbagai situasi korosif, pirimidin berpotensi sebagai penghambat korosi. Dibutuhkan banyak waktu dan sumber daya untuk melakukan investigasi eksperimental dalam eksplorasi kandidat penghambat korosi potensial. Dalam studi ini, kami mengevaluasi algoritma gradient boosting regressor (GBR), support vector regression (SVR), dan k-nearest neighbor (KNN) sebagai model prediktif efisiensi inhibisi korosi menggunakan pendekatan machine learning (ML) berbasis model quantitative structure-property relationship (QSPR). Berdasarkan metrik coefficient of determination (R2) dan root mean square error (RMSE), kami menemukan bahwa model GBR memiliki performa prediksi terbaik dibandingkan model SVR dan KNN maupun model dari literatur untuk dataset senyawa pirimidin. Secara keseluruhan, penelitian kami menawarkan perspektif baru tentang kemampuan model ML untuk meramalkan penghambatan korosi pada permukaan besi.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-07-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9864
10.31315/e.v20i2.9864
Eksergi; Vol 20, No 2 (2023); 107-111
Eksergi; Vol 20, No 2 (2023); 107-111
2460-8203
1410-394X
10.31315/e.v20i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9864/pdf
Copyright (c) 2023 Muhamad Akrom, Totok Sutojo
oai:ojs.jurnal.upnyk.ac.id:article/5290
2023-01-15T05:33:08Z
eksergi:ART
driver
The Effect of Sand Mining on River Erosion and Sedimentation (Case Study in Tanjung Alam Village, Sei Dadap District, Asahan Regency)
PENGARUH PERTAMBANGAN PASIR TERHADAP EROSI DAN SEDIMENTASI SUNGAI (STUDI KASUS DI DESA TANJUNG ALAM KECAMATAN SEI DADAP KABUPATEN ASAHAN)
Muchlish, Muslich
Faisyal, I.A.
Sunarsih, Sri
sand mining, sedimentation, erosion rate value
Sand mining in Tanjung Alam Village, Sei Dadap District, Asahan Regency, which is carried out with a suction machine is thought to have a negative impact on the environment. This study aims to examine the effect of sand mining on erosion and sedimentation in that river. The analysis steps begins with measuring the river profile, measuring flow velocity, measuring river discharge, measuring sediment concentration, measuring rainfall, measuring slope and calculating the estimated rate of erosion. To calculate the estimated erosion rate in this study using the USLE method and to calculate the sediment load using SNI 3414: 2008 with the depth-integrating technique. Based on the calculation results, it is known that sand mining activity causes narrowing of the river profile, accelerates river flow, increases river discharge so that it increases the rate of erosion, and sedimentation. The highest sediment load value is at point 5 which is located downstream of mining 1 and 2 with a value of 2922.48 tons/day. While the highest estimated erosion rate is at point 5 with a value of 125.9 tons/ha/year which is included in the heavy category. Measurements at each sampling point prove that sand mining activities have a high impact on increasing the rate of erosion and sedimentation in rivers.
Sand mining in Tanjung Alam Village, Sei Dadap District, Asahan Regency, which is carried out with a suction machine is thought to have a negative impact on the environment. This study aims to examine the effect of sand mining on erosion and sedimentation in that riverThe analysis steps begins with measuring the river profile, measuring flow velocity, measuring river discharge, measuring sediment concentration, measuring rainfall, measuring slope and calculating the estimated rate of erosion. To calculate the estimated erosion rate in this study using the USLE method and to calculate the sediment load using SNI 3414: 2008 with the depth-integrating techniqueBased on the calculation results, it is known that sand mining activity causes narrowing of the river profile, accelerates river flow, increases river discharge so that it increases the rate of erosion, and sedimentation. The highest sediment load value is at point 5 which is located downstream of mining 1 and 2 with a value of 2922.48 tons/day. While the highest estimated erosion rate is at point 5 with a value of 125.9 tons/ha/year which is included in the heavy category. Measurements at each sampling point prove that sand mining activities have a high impact on increasing the rate of erosion and sedimentation in rivers
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2021-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5290
10.31315/e.v18i2.5290
Eksergi; Vol 18, No 2 (2021); 65-70
Eksergi; Vol 18, No 2 (2021); 65-70
2460-8203
1410-394X
10.31315/e.v18i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5290/pdf
Copyright (c) 2021 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/363
2015-09-18T03:35:55Z
eksergi:ART
driver
Potency of Microalgae as Source of Functional Food in Indonesia (Overview)
Azimatun Nur, Muhamad Maulana
Malnutrition in Indonesia; Microalga; Functional Food.
Malnutrition in Indonesia continues to increase. It is needed to develop functional food source that is capable to be produced in rapid, feasible, sustainable, and meets the nutritional needs for the country. Microalgae is a type of single-celled plants, live in water by using photosynthesis to produce biomass. Microalgae such as Spirulina platensis has a high protein content. It also contains vitamins and pigments that is useful to the body. The potential of microalgae production in Indonesia is high considering that Indonesia passed the equator and has a supporting environment. Trends in the future, it is expected Indonesia could produce microalgae at high mass scale, at a cheap price and can be applied in everyday life.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-12-28
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/363
10.31315/e.v11i2.363
Eksergi; Vol 11, No 2; 1-6
Eksergi; Vol 11, No 2; 1-6
2460-8203
1410-394X
10.31315/e.v11i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/363/pdf_1
oai:ojs.jurnal.upnyk.ac.id:article/7586
2022-08-15T04:33:16Z
eksergi:ART
driver
Pemanfaatan Cangkang Bekicot sebagai Koagulan Alternatif untuk Meningkatkan Kualitas Air Sungai Code
Widayati, Tunjung Wahyu
Retno, Dyah Tri
Wijayanti, Nanik
Pemanfaatan Cangkang Bekicot sebagai Koagulan Alternatif untuk Meningkatkan Kualitas Air Sungai Code
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/56-61
10.31315/e.v9i1.7586
Eksergi; Vol 9, No 1 (2009): Versi Cetak
Eksergi; Vol 9, No 1 (2009): Versi Cetak
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/56-61/4554
Copyright (c) 2022 Tunjung Wahyu Widayati, Dyah Tri Retno, Nanik Wijayanti
oai:ojs.jurnal.upnyk.ac.id:article/6132
2022-11-07T10:13:06Z
eksergi:ART
driver
Production of biodiesel from waste cooking oil using heterogeneous catalyst
Jaya, Danang
Wahyu Widayati, Tunjung
Salsabiela, Hanum
Abdul Majid, Muhammad Fathan
minyak jelantah; katalis CaO; esterifikasi; transesterfikasi; biodiesel
The world's oil reserves are running low, which makes the government also implement a mandatory B30 policy starting in early 2020. With this policy, it is necessary to develop energy by utilizing renewable energy such as vegetable oil that can be converted into biodiesel. Waste cooking oil is one of the vegetable oils that has the potential to be processed into biodiesel because the use of waste cooking oil in Indonesia is still not developed. In this study, we report the yield of biodiesel from waste cooking oil with variations in the ratio of the number of moles and weight of heterogeneous catalysts. Biodiesel is made by esterification and transesterification with a heterogeneous catalyst (CaO), then a separation process is carried out to separate the biodiesel produced from the by-product in the form of glycerol. The separated biodiesel is then analyzed for density, viscosity, flash point, and pour point. The results showed that the best biodiesel was at a mole ratio of 1:24 with 3% CaO catalyst. Based on the analysis data, this biodiesel has the largest yield of 72.49% with a viscosity value of 4.9806 cSt, a flash point value of 72.5 oC, a pour point value of 0 oC, and a density value of 0.8662 g/ml and calorific value. 8837,302 cal/gram. With the results of the analysis, that are in accordance with the quality standards of SNI 7182:2015.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-04-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6132
10.31315/e.v0i0.6132
Eksergi; Vol 19, No 1 (2022); 29-34
Eksergi; Vol 19, No 1 (2022); 29-34
2460-8203
1410-394X
10.31315/e.v19i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6132/pdf
Copyright (c) 2022 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/1413
2016-06-16T13:01:37Z
eksergi:ART
driver
Biodiesel dari Minyak Goreng Sawit Bekas dengan Katalis Heterogen CaO: Studi Penentuan Rasio Mol Minyak/Metanol dan Waktu Reaksi Optimum
Haryono, Haryono
Rahayu, Iman
Yulyati, Yati B.
biodiesel; katalis CaO; minyak goreng bekas; rasio mol; waktu reaksi
Keterbatasan daya dukung bahan bakar fosil terhadap pemenuhan kebutuhan energi yang berkelanjutan dan ramah lingkungan, telah mengarahkan masyarakat pada upaya-upaya untuk menemukan dan mengembangkan sumber-sumber energi alternatif yang bersifat baru dan terbarukan. Salah satunya jenis energi terbarukan tersebut adalah biodiesel. Penelitian ini bertujuan untuk mensintesis biodiesel dengan memanfaatkan limbah minyak goreng sawit bekas. Penelitian dikhususkan pada penentuan rasio mol minyak/metanol dan waktu reaksi transesterifikasi dengan katalis basa heterogen CaO. Rasio mol minyak/metanol dipelajari pada variasi 1/5, 1/10, 1/15, dan 1/20. Sedangkan waktu reaksi divariasikan selama 1, 1,5, 2, 2,5, dan 3 jam. Reaksi dilakukan pada suhu 65oC dan kadar katalis CaO sebanyak 3%. Hasil penelitian menunjukkan bahwa kondisi optimum reaksi dicapai pada saat sintesis biodiesel dilakukan pada rasio mol minyak/metanol sebesar 1/15 dengan lama reaksi 2,5 jam. Pada kondisi reaksi tersebut diperoleh biodiesel dengan beberapa parameter kualitas yang diuji telah sesuai dengan SNI untuk Biodiesel (SNI-04-7182-2006), yaitu: densitas 0,867 g/cm3, viskositas 5,28 mm2/s (pada suhu 40oC), titik kilat 182oC, angka asam 0,28 mg KOH/g, gliserol bebas 0,014%, gliserol total 0,10%, kadar ester 97,8%, dan angka iod 31,62%, serta yield biodiesel sebesar 86,0%.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2016-06-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1413
10.31315/e.v13i1.1413
Eksergi; Vol 13, No 1 (2016); 1-6
Eksergi; Vol 13, No 1 (2016); 1-6
2460-8203
1410-394X
10.31315/e.v13i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1413/pdf_12
oai:ojs.jurnal.upnyk.ac.id:article/7618
2022-08-15T04:32:42Z
eksergi:ART
driver
EVALUASI KONSTANTA PERSAMAAN KARAKTER PHOTOVOLTAIC TYPE MULTI KRISTAL DENGAN METODE HOOKE-JEEYES
Marnoto, Tjukup
Persamaan karakter arus dan voltase (I-V) dari photovoltaik, mengandung beberapa konstanta, Persamaan ini dapat berlaku umum untuk meramalkan karakter (l-V) photovoltaic, apabila nilai-nilai konstanta diketahui. Penentuan nilai-nilai konstanta dilakukan berdasarkan dari data-data elsperimen yang dilakukan dengan variasi variabel yang berpengaruh. Nilai konstanta yang sesuai didapatkan dengan membandingkan data-hasil perhitungan'dengan data eksperimen menggunakan kaedah jumlah kuadrat kesalahan (SSE) minimum, proses ini dikenal sebagai optimasi (minimasi) persamaan nonlinier multi variabel. Pada tulisan ini akan dipaparkan optimasi regresi nonlinier multi variabel, dengan metoda pencarian langsung tanpa kendala (Hooke-Jebves method) dan algoritma maupun diagram alir program metode Hooke-Jeeves. Pemrogramankomputer dilakukan dengan bantuan bahasa program Scilab. Hasil optimasi diperoleh konstanta persamaan k1: 0.0065, k2= 0.006, k3=2858173 dan k4=12960. Persamaan model maternatik ini dengan konstanta tersebut dapat mewakili karakterist k photovoltaic type multikristal.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7618
10.31315/e.v10i1.7618
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 55-60
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 55-60
2460-8203
1410-394X
10.31315/e.v10i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7618/4600
Copyright (c) 2022 Tjukup Marnoto
oai:ojs.jurnal.upnyk.ac.id:article/3700
2022-11-07T10:29:53Z
eksergi:ART
driver
Process Dynamic of Two-Thermal-Tank-Series with Dead Time
Hermawan, Yulius Deddy
Nandari, Wibiana Wulan
Irfandy, Fauzan
Rahmadi, Riski Ajin
Perkasa, Aryandhanu Mukti Tri
dead-time; open loop; step input; TTTS; Xcos
The multi-tank-series system could come up the problem of instability due to dead-time. The goals of this work are to study the dynamic behavior of Two-Thermal-Tanks-Series (TTTS) with dead time through the open loop experiment in laboratory, and to propose the new-module of fundamental chemical engineering practicum in field of process dynamic for undergraduate program. The two stirred-tank-heaters @10L were designed for heating of water fluid. Both of tanks were designed overflow to maintain their volume constant. The gate valve was installed in the inlet pipe of Tank-1 to adjust its volumetric flowrate (f). The inlet temperature of Tank-1 (T1), the liquid temperatures in Tank-1 (T2) and Tank-2 (T3) were measured by thermocouple multi-channels. The volt-ampere-regulators were used to adjust the electrical energy in Tank-1 (q1) and Tank-2 (q2). The mathematical model was solved and rigorously examined in Xcos/Scilab. In order to study the dynamic behavior of TTTS, the inlet flowrate disturbance was made based on step input change. According to our investigation in laboratory and open loop simulation, both Tank-1 and Tank-2 gave stable responses, the model’s responses showed the closed and similar trend with laboratory’s responses, and time delay of about 30 seconds has been found in Tank-2.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2020-12-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3700
10.31315/e.v17i2.3700
Eksergi; Vol 17, No 2 (2020); 45-50
Eksergi; Vol 17, No 2 (2020); 45-50
2460-8203
1410-394X
10.31315/e.v17i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3700/pdf
Copyright (c) 2020 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/10677
2024-02-19T03:48:35Z
eksergi:ART
driver
Kinetika Produksi Selulosa Bakteri dari Limbah Kulit Pisang
Panjaitan, Jabosar Ronggur Hamonangan
Sitompul, Devi Monika
kinetic reaction, banana peel, bacterial cellulose.
Limbah kulit pisang dengan kandungan yang kaya akan nutrisi dan mineral memiliki potensi untuk dibuat selulosa bakteri. Pada penelitian ini akan diteliti kinetika reaksi pembuatan selulosa bakteri dari limbah kulit pisang. Model kinetika yang digunakan pada penelitian ini menggunakan metode kinetika fermentasi. Berdasarkan hasil penelitian yang telah dilakukan diketahui bahwa produksi selulosa bakteri berada pada tahap eksponensial dengan lama waktu fermentasi selama 14 hari. Waktu fermentasi mempengaruhi selulosa bakteri yang dihasilkan dimana semakin lama waktu fermentasi yang digunakan akan menghasilkan semakin besar massa selulosa bakteri. Kulit pisang sebagai bahan baku pada penelitian ini dapat memenuhi kebutuhan karbon untuk fermentasi selain glukosa. Parameter kinetika produksi selulosa bakteri dari limbah kulit pisang sesuai hasil optimasi antara data dan model kinetika diperoleh nilai parameter kinetika reaksi yaitu µmax (maximum specific growth rate), ks (konstanta monod), kd (konstanta laju kematian sel) dan m (konstanta sel maintanance). sebesar 0,297/hari, 2,059 g/L, 1,137/hari dan 1,325/hari.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2024-01-23
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10677
10.31315/e.v21i1.10677
Eksergi; Vol 21, No 1 (2024); 38-43
Eksergi; Vol 21, No 1 (2024); 38-43
2460-8203
1410-394X
10.31315/e.v21i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10677/pdf
Copyright (c) 2024 Jabosar Ronggur Hamonangan Panjaitan
oai:ojs.jurnal.upnyk.ac.id:article/323
2014-12-07T17:16:00Z
eksergi:ART
driver
Pengaruh Daya Listrik Oven Gelombang Mikro terhadap Pemecahan Emulsi Minyak Mentah Cepu
Nuri,MT, Ir.Wasir
Breaking; emulsion; crude oil; microwave.
Steam which injected to the oil well form a water in oil emulsion (W/O), emulsion must be broke to oil and water phase because disturb oil processing in the refinery unit. The emulsion stability depends on pH, water salinity, temperature and asphaltene, resin and wax content. This research are to find breaking effectiveness emulsion crude oil from Cepu and compare with usual oven. In this research water crude oil emulsion made from Cepu oil well with water salinity 20 ppt. Further the emulsion is affected using microwave radiation from microwave apparatus with variation electric power from 54to 432 Watts. Emulsion breaking with microwave more effective considered with effects use conventional oven. Research showed that increasing electrical power caused produce percentage emulsion breaking increase and faster. Demulsification emulsion formed water salinity 20 ppt in microwave oven with electrical power 432 Watt is the fastest breaking with broke reach 100 percents in five minutes. While demulsification with electrical power 54 Watt the longest breaking, during nineteen minutes break 100 percents. While using conventional oven needs 40 minutes for breaking 100 percents. This results show that emulsion breaking use microwave process more effective considering with use of conventional oven.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-10-29
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/323
10.31315/e.v11i1.323
Eksergi; Vol 11, No 1; 50-56
Eksergi; Vol 11, No 1; 50-56
2460-8203
1410-394X
10.31315/e.v11i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/323/275
oai:ojs.jurnal.upnyk.ac.id:article/7549
2022-08-15T04:33:34Z
eksergi:ART
driver
Simulasi Enhancement Factor untukAbsorpsi Gas disertai Reaksi Kimia Reversibel Orde Dua Kondisi Non Isotermal dengan Model Difusitas Eddy
Indrasari, Yunita D
Serpara, Koatlely
Altway, Ali
Proses absorpsi gas ke dalam liquida seríngkali dijumpai dalam dunia industri. Proses ini dilakukan untuk memisahkan suatu komponen yang tidak diinginkan dan untuk mendapatkan suatu senyawa yang merupakan hasil reaksi. Proses absorpsi di industri.umumnya adalah absorpsi secara kimia yang dilakukan dalam packed column atau bubble column dengan aliran counter current. Reaksi kimia dapat terjadi secaraineversibel atau reversibel. Pada kondisi nyatq proses absorpsi gas terjadi pada kondisi non isotennal yang sangat dipengaruhi oleh panas pelarutan gas. Pengaruh panas dan reaksi kimiaterhadap laju absorpsi dinyatakan dengan enhancement factor. Beberapa penelitian terdahulu tentang enhancement factor untuk absorpsigas pada kondisi non isotermal terbatas pada pemakaian model film dan model higbie. Model film cukup sederhana namun kurang realistis dengan asumsi film stagnan. Model higbie cukup realistis namun melibatkan persaamaandifusivitas unsteady state yang rumit. Pada simulasi ini penelitian dikembangkan dengan model difusivitrs eddyuntuk reaksi orde dua. Model ini cukup realistis namun sederhana. Tujuan dari penelitian ini adalah permodelan matematis untuk menentukan faktor peningkatanabsorpsi gas dalam larutan yang disertai reaksi reversibel orde dua dalam kondisi non isotermal dengan model difusivitas eddy. Penelitian dilakukan secara teoritis dengan simulasi menggunakan program matlab dimana perumusan harga enhancement factor diturunkan dari persamaan dasar absorpsi dengan menggunakan model difusivitas eddy. Harga-harga variabel yang ditinjau pada penelitian ini adalah perbandingan rate difusi A terhadap rate difusi B (S) 0.01 0.0125, bilangan hatta 0 antara I 100, energi aktivasi difusi 0 4 -2 ,energi aktivasi reaksi 0 5, energi aktivasi pelarutan 0 0 - 1.5, panas pelarutan 0 dan panas reaksi 0 0.001 0.003, konstanta kesetimbangan (K) 10 - 15, ratio konsentrasi (L) 100, dan ratio difusi (T) LReynolds number 5000 (Tak berdimensi). Dari penelitian yang telah dilakukan didapatkan bahwa harga enhancement factor dipengaruhi oleh harga S dan bilangan hatta. Semakin besar bilangan hatta cenderung akan mempercepat laju absorpsi. Dan diperoleh bahwa dengan model difusivitas eddy, harga enhancement factor yang didapatkan lebih besar daripada dengan menggunakan model film. Panas kelarutan, panas reaksi, dan energy aktivasi memiliki andil tersendiri dalam mempengaruhi harga enhancement factor.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7549
10.31315/e.v9i1.7549
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 32-35
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 32-35
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7549/pdf
Copyright (c) 2022 Yunita D Indrasari, Koatlely Serpara, Ali Altway
oai:ojs.jurnal.upnyk.ac.id:article/2149
2018-01-23T00:23:23Z
eksergi:ART
driver
Perbaikan Mutu Bodi Keramik Lempung Pundong Dengan Penambahan Pecahan Kaca Lampu Neon Bekas
Kuntaarsa, Abdullah
Perbaikan, Mutu; Lempung, Pundong; Bodi Keramik; Pecahan Kaca Neon
Lempung Pundong, Bantul merupakan bahan utama dalam pembuatan keramik, dimana lempung Pundong masih kurang baik kekuatannya pada bodi keramik. Kaca neon mengandung banyak mineral silica dan alumina sebagai bahan pengikat dalam campuran tanah liat sehingga sangat baik bila digunakan penambah pada bodi keramik. Dalam penelitian ini dilakukan pembuatan bodi keramik dengan bahan baku lempung Pundong, Bantul ditambah pecahan kaca neon untuk memperbaiki kualitas. Proses pembuatan bodi keramik meliputi penyiapan bahan baku, pembuatan adonan dengan campuran antara lempung Pundong dan pecahan kaca neon. Kemudian diaduk dan ditambahkan air sedikit demi sedikit sampai cukup plastis, setelah itu tahap pencetakan, pengeringan dan pembakaran pada suhu 1100oC. Penelitian ini menggunakan waktu penahanan suhu pembakaran antara 10 menit dan 20 menit dan perbandingan komposisi antara lempung Pundong dan pecahan kaca neon pada sampel I ( 100gr : 0gr ) ; pada sampel II ( 95gr : 5gr ) ; sampel III ( 90gr : 10gr ) ; sampel IV ( 85gr : 15gr ) ; sampel V (80gr : 20gr ). Dari hasil penelitian didapat bahwa semakin banyak pecahan kaca neon yang ditambahkan dan penahanan suhu yang semakin lama, hasil modulus patah semakin besar dan porositas semakin kecil. Diperoleh hasil terbaik dengan modulus patah 149,04 kg/cm2 , susut bakar 4,62% dan porositas 9,37% pada perbandingan komposisi (80gr : 20gr) dan penahanan suhu selama 20 menit
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2017-12-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2149
10.31315/e.v14i2.2149
Eksergi; Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 62-71
Eksergi; Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 62-71
2460-8203
1410-394X
10.31315/e.v14i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2149/1890
oai:ojs.jurnal.upnyk.ac.id:article/9170
2023-09-13T07:40:54Z
eksergi:ART
driver
Particles Size Distribution of Granulation of Cassava Flour with Tapioca Starch Using Rotary Drum Granulator
Distribusi Ukuran Granul dari Tepung Singkong dengan Tepung Tapioka sebagai Pengikat pada Rotary Drum Granulator
Handayani, Dian Purnami
Sediawan, Wahyudi Budi
Timotius, Daniel
Puspitasari, Mitha
birth rate, cassava flour, granule, layering, tapioca starch
Granulation is a process of monoparticle attachment with a particular mechanism to form a bigger and compact particle which is called granule. Granulation application has been used on many industries like pharmacy and agriculture industries. Research about granulation has been done continuously to get predictive models for various cases. The model which is only applicable to the specific material used in this research is expected to be useful to optimize the perfomances of the granulator in the industries. This research aims to develop the kinetics model of granule size distribution of cassava flour and its connection to granulation time by varying the mass of tapioca starch as the binder in rotary drum granulator. 2 grams of Cassava flour and tapioca starch were mixed in the rotary drum granulator and then water was sprayed during the granulation process. The duration of granulation were 5, 10, 15, 20, and 25 minutes. The variations of mass of the binder used in this research were 1, 1,5, and 2 gram. The granules were dried in the oven at 80°C until 30 minutes, and afterwards the granules were screened through various screen layers with different mesh size. The results of this research show that binder mass variations do not influence the layering rate of granule, and the increase of binder mass will decrease the birth rate.
Granulasi merupakan proses pelekatan partikel-partikel serbuk tunggal denganmekanisme tertentu menjadi partikel yang lebih besar dan saling menyatu yang disebut granul. Penelitian seputar granulasi terus dilakukan agar diperoleh model matematis yang bersifat prediktif. Model yang hanya berlaku spesifik terhadap bahan yang dikaji ini diharapkan dapat dimanfaatkan untuk perancangan dan optimasi granulator di industri. Penelitian ini bertujuan untuk memprediksi distribusi ukuran granul tepung singkong dengan variasi jumlah tepung tapioka sebagai pengikat (binder). Tepung singkong sebanyak 2 gram dan tepung tapioka dengan jumlah yang divariasikan diaduk hingga merata kemudian diputar dengan putaran konstan dalam rotary drum granulator sambil disemprot air. Lamanya proses granulasi diatur selama 5, 10, 15, 20, dan 25 menit. Variasi pengikat yang digunakan dalam penelitian ini adalah 1, 1,5, dan 2 gram tepung tapioka. Pengeringan dilakukan menggunakan oven selama 30 menit dengan suhu 80°C. Granul kering diayak dengan berbagai ukuran ayakan untuk mengetahui distribusi populasi granul. Hasil penelitian menunjukkan bahwa variasi jumlah pengikat tidak berpengaruh terhadap laju layering. Penambahan pengikat akan menurunkan birth rate.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-07-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9170
10.31315/e.v20i2.9170
Eksergi; Vol 20, No 2 (2023); 52-57
Eksergi; Vol 20, No 2 (2023); 52-57
2460-8203
1410-394X
10.31315/e.v20i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9170/pdf
Copyright (c) 2023 Dian Purnami Handayani, Wahyudi Budi Sediawan, Daniel Timotius
oai:ojs.jurnal.upnyk.ac.id:article/4554
2022-11-07T10:15:39Z
eksergi:ART
driver
Design of a Water Filter Model with Ceramic Powder for Filter Media
Wisaksono, Bambang
Wahyudi, Hari
Aini, Syarifah
Besi (Fe); Kadmium (Cd); Mangan (Mn); Kualitas; Air.
Groundwater in the UPN Veteran Yogyakarta integrated campus complex smells and has a reddish brown color, and if the water also causes sediment in the water reservoir, it is assumed that the groundwater contains quite high levels of Ferro (Fe) and Manganese (Mn). Efforts are needed to reduce levels of Ferro (Fe) and Manganese (Mn) in accordance with the required regulations. The main focus of this research is to make a prototype of a clean water filter instrument to reduce levels of Ferro (Fe) and Manganese (Mn) in well water which functions to filter well water into clean water that is fit for consumption in accordance with the standards of the Regulation of the Minister of Health of the Republic of Indonesia number 32 at 2017. Based on the results of the well water quality test, 4 water quality parameters have a value that exceeds the required quality standard threshold, namely the pH value, Ferro (Fe) content, Manganese (Mn) content, and Cadmium (Cd) content. The composition of the water filter media composition is designed based on the results of the preliminary test analysis of the quality of well water as an example of raw water. The water filter tube is made of 4 inch diameter PVC pipe with a length of 80 cm. The composition of the filter media consists of: activated carbon, 25 cm; ceramic powder, 25 cm; volcanic sand, 15 cm; and gravel, 10 cm
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2021-05-10
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4554
10.31315/e.v0i0.4554
Eksergi; Vol 18, No 1 (2021); 32-36
Eksergi; Vol 18, No 1 (2021); 32-36
2460-8203
1410-394X
10.31315/e.v0i0
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4554/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/downloadSuppFile/4554/371
Copyright (c) 2021 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/341
2022-08-15T04:32:21Z
eksergi:ART
driver
Produksi Biodisel dari Minyak Jelantah Menggunakan Katalis Asam padat (Nafion/SiO2)
Mahreni, Mahreni
solid acid; heterogeneous catalyst; WCO; renewable energy; Nafion/SiO2.
Production of biodisel from waste cooking oil (WCO) was performed using a double catalyst Nafion/SiO2 as esterification catalyst and NaOH is used as transesterification catalyst . Study was conducted through three stages:as well as synthesis of Nafion/SiO2 solid acid catalyst, the synthesis of biodisel using a single catalyst (NaOH) and the synthesis of biodisel using a catalyst (Nafion/SiO2 and NaOH). Solid acid catalyst is made of Nafion 5 wt.% solution and the (Tetra Ethoxy Ortho silicate, TEOS) using solution phase sol-gel method to produce Nafion/SiO2. Furthermore Nafion/SiO2 was applied as esterification catalyst. Esterification reaction conditions at temperatures of 75oC and fixed reaction time of 45 minutes. The reaction is run at three-neck flask equipped with a stirrer, thermometer and cooling water. Products are separated and the upper layer is used as a reactant of transesterification reaction using NaOH catalyst and results biodisel (FAME). Result analysis of physical properties, ie viscosity, density and flash point FAME meets the standard requirements of biodisel. Chemical characterization in the FAME show there are more than six kinds of methyl esters indicate that FAME was formed. The percentage of biodisel that is produced by using dual catalyst is higher compared to using a single catalyst proved that the solid acid catalyst plays an important role in converting the free fatty acid in to ester in the WCO.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-11-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/341
10.31315/e.v10i2.341
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 52-57
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 52-57
2460-8203
1410-394X
10.31315/e.v10i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/341/291
oai:ojs.jurnal.upnyk.ac.id:article/7581
2022-08-15T04:33:16Z
eksergi:ART
driver
Koefisien Perpindahan Massa pada Ekstraksi Tanin dari Putrimalu (Mimosa Pudika)
Marnoto, Tjukup
Haryono, Gogot
Koefisien Perpindahan Massa pada Ekstraksi Tanin dari Putrimalu (Mimosa Pudika)
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/29-33
10.31315/e.v9i1.7581
Eksergi; Vol 9, No 1 (2009): Versi Cetak
Eksergi; Vol 9, No 1 (2009): Versi Cetak
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/29-33/pdf
Copyright (c) 2022 Tjukup Marnoto, Gogot Haryono
oai:ojs.jurnal.upnyk.ac.id:article/2938
2022-11-07T10:31:11Z
eksergi:ART
driver
Laboratory Core-flooding Test of Surfactant-Polymer Injection Method for Oilfield Production Improvement
Kristanto, Dedy
Wibowo, Wibowo
Hariyadi, Hariyadi
Hermawan, Yulius Deddy
Coreflooding; enhanced oil recovery; chemical flooding; surfactant-polymer
The utilization of chemical flooding to improve oil production in a large scale has many used for the oil field. Some cases have a success, and the others have fail when full scale project implemented. Before chemical flooding conducted, once of the recommended best practice to be done is chemical compatibility based on the reservoir characteristic of the layer as a target in improving oil recovery. Hence, coreflooding test in the laboratory to be an important thing to conduct in other to knows and determine the chemical performance after screening phase. The study of coreflooding test in the laboratory, shows that the measurement of surfactant and polymer properties have a good results to be used as an injection fluid in other to improve oil production. Surfactant - polymer injection which has concentrations of 3000 ppm and 1000 ppm with injection mechanism of 0.3 PV surfactant and 0.2 PV polymer gives the result of improving oil production it about 12.89%. Furthermore, based on the qualitative analysis obtained that the used of surfactant SS-B8020 as an injection fluid shown that plugging has not occurred in the reservoir rock pores, it means that the injection fluid was compatible with these reservoir rock.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2019-07-23
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2938
10.31315/e.v16i1.2938
Eksergi; Vol 16, No 1 (2019); 25-30
Eksergi; Vol 16, No 1 (2019); 25-30
2460-8203
1410-394X
10.31315/e.v16i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2938/pdf
Copyright (c) 2019 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/10835
2024-02-19T03:56:25Z
eksergi:ART
driver
Penentuan Konstanta Isoterm Freundlich dan Kinetika Adsorpsi Karbon Aktif Terhadap Asam Asetat
Setyorini, Dwi
Arninda, Andi
Syafaatullah, Achmad Qodim
Panjaitan, Renova
Isoterm Freundlich , Pseudo first orde, Pseudo second orde
Karbon aktif merupakan salah satu adsorben yang paling sering digunakan. Salah satu senyawa yang dapat diserap yaitu asam asetat. Untuk mengetahui kinerja adsoben lebih lanjut, maka diperlukan studi kinetika berdasarkan persamaan isotherm Freundlich. Isoterm Freundlich mampu menunjukkan jenis adsopsi apakah secara kimisorpsi atau fisisorpsi dan berlangsung secara multilayer. Studi kinetika pseudo first orde dan pseudo second orde dimaksudkan untuk mengetahui mekanisme dan karakteristik adsorpsi yang berlangsung. Penelitian ini bertujuan untuk mengetahui konstanta isotherm Freundlich dan kinetika adsorpsi karbon aktif terhadap asam asetat. Konsentrasi asam asetat yang digunakan untuk mengetahui konstanta freundlich yaitu 0,5M, 0,25M, 0,125M, 0,0625M, 0,03125M dengan lama waktu kontak selama 10 menit. Sedangkan kinetika adsorpsi dilakukan dengan menggunakan asam asetat yang berkonsentrasi 0,5 M dengan waktu adsorpsi 2 menit, 4 menit, 6 menit, 8 menit dan 10 menit. Kemudian filtrat di titrasi dengan NaOH 0,1N. Ukuran karbon aktif yang digunakan antara lain 180 mess, 420 mess dan 600 mess. Data yang diperoleh dianalisis dengan persamaan freundlich, pseudo first orde dan pseudo second orde. Data analisis yang didapatkan nilai konstanta freundlich yaitu sebesar 50,00342 dan memenuhi kinetika orde dua yang artinya, proses adsorpsi dipengaruhi lebih dari satu faktor.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10835
10.31315/e.v20i3.10835
Eksergi; Vol 20, No 3 (2023); 149-155
Eksergi; Vol 20, No 3 (2023); 149-155
2460-8203
1410-394X
10.31315/e.v201i3
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10835/pdf
Copyright (c) 2023 Dwi Setyorini
oai:ojs.jurnal.upnyk.ac.id:article/7613
2022-08-15T04:32:42Z
eksergi:ART
driver
PEMANFAATAN LIMBAH IKAN MENJADI TEPUNG IKAN SEBAGAI SUMBER PROTEIN
Mahargiani, Titik
Limbah ikan laut ( kepala, ekor ) telah diketahui mengandung protein dengan kadar yang relatif tinggi. Untuk memanfaatkan protein yang terkandung dalam limbah ikan, maka dapat diolah menjadi tepung ikan. Tepung ikan sebagai sumber protein hewani sangat baik jika dijadikan produk olahan makanan untuk menunjang gizi yang dibutuhkan manusia. Limbah ikan diolah menjadi tepung ikan dengan cara dilarutkan memakai NaOH,kemudian diendapkan memakai HCI pada pH tertentu. Selain dihasilkan tepung ikan yang berprotein tinggi, juga tahan dalam penyimpanan karena selama proses kandungan air dan lemak ikut berkurang sampai kandungan airnya berkurang dari 10%. Proses hidrolisis memakai NaOH dilakukan pada kondisi suhu 60oC, waktu 2 jarm, pH = 3; dengan jumlah limbah ikan : 20 gram dan NaOH 0,5 N sebanyak 200 ml, akan diperoleh tepung ikan dengan kadar protein sekitar 38,82 %.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7613
10.31315/e.v10i1.7613
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 29-33
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 29-33
2460-8203
1410-394X
10.31315/e.v10i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7613/4595
Copyright (c) 2022 Titik Mahargiani
oai:ojs.jurnal.upnyk.ac.id:article/3298
2022-11-07T10:30:19Z
eksergi:ART
driver
Enhancing coal tailing quality by Flotation Method using Biosurfactant from Lerak (Sapindusrarak De Candole)
Jaya, Danang
Widayati, Tunjung Wahyu
Mustika, Refina Yuni
Suwardi, Halim Nur Aziz
coals tail, lerak (biosurfactant), flotation, particle size, pH , column diameter, sulphur content, ash content, calorific value
Wasted from coal mining that mixed with the wasted of the coal washing product called Coals Tailing (CT) has a low calorific value,high sulfur and ash content. To upgrade its quality by increasing its calorific value and to reduce environmental pollution by reducing sulfur and its ashes, coal must improve from its impurities, one of which is to try with flotation method. Flotation is a process that describes solids that occur due to differences in surface properties (surface properties). The flotation process takes place in a system consisting of three phases, namely gas phase, liquid, and solid, which are interrelated to complete the appearance (with the help of flotation agent / surfactant) so that discussion occurs between the hydrophobic component (waterproof) and the hydrophilic component (like water). The main objective of the research is to improve the quality of coals tailing (CT), by increasing the calorific value (reducing the content of sulfur, ash, and other impurities) using the flotation method, and using lerak (Sapindus rarak De Candole) as a surfactant. From this research show that an optimal conditions were obtained, at particle size of -80 / + 100 mesh, operating conditions at pH 6, calorific value increased from initially 3230,171 cal/gr to 5035,622 cal/gr, sulfur content decreased according to the optimum condition reached 2026.08 mg /kg, and the ash content decreased from 54.61% to 33.9%. From the results of these research indicate, Lerak as a surfactant is is enhanced to improve the quality of Tailings Coal (CT) by flotation method.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2020-04-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3298
10.31315/e.v17i1.3298
Eksergi; Vol 17, No 1 (2020); 20-27
Eksergi; Vol 17, No 1 (2020); 20-27
2460-8203
1410-394X
10.31315/e.v17i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3298/pdf
Copyright (c) 2020 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/10148
2024-02-19T03:48:35Z
eksergi:ART
driver
Pemanfaatan Ekstrak Daun Ketapang (Terminalia catappa L.) sebagai Antibakteri untuk Produksi Sabun Cair
Nurfatihayati, Nurfatihayati
Heltina, Desi
Putra, Eden
Delef, Fahrul Fajar
Alfarisi, Cory Dian
Drastinawati, Drastinawati
antibakteri; ekstrak daun ketapang; minyak kelapa; sabun cair
Ekstrak daun ketapang (Terminalia catappa L.) mengandung senyawa kimia antibakteri yang dapat dimanfaatkan dalam memproduksi sabun cair. Tujuan penelitian ini memperoleh sabun cair dan menentukan variasi terbaik ekstrak ketapang untuk sabun cair yang memenuhi mutu sabun cair SNI 4085-2017. Penelitian ini bersifat eksperimental yang terdiri dari ekstrak daun ketapang dengan konsentrasi 0%, 2%, 4%, dan 6% serta KOH 25%, 30% dan 35%. Pembuatan ekstrak daun ketapang dilakukan dengan cara maserasi. Proses pembuatan sabun menggunakan metode hot process. Pengujian sabun cair meliputi uji pH, asam lemak bebas, angka lempeng total, stabilitas busa, menghitung perolehan sabun cair, dan menentukan variasi terbaik ekstrak ketapang pada sabun cair. Hasil penelitian ini menunjukkan perolehan sabun cair terbesar terdapat pada konsentrasi KOH 30% dengan konsentrasi ekstrak 4%, yaitu 157,35 gram dan rendemen 52,45%. Variasi ekstrak daun ketapang terbaik diperoleh pada konsentrasi 4% pada konsentrasi KOH 25% dengan karakteristik sabun cair, yaitu pH 9,19, asam lemak bebas 1,74%, angka lempeng total 0 x 101 koloni/ml, stabilitas busa 96,26%, dan zona hambat 11 mm. Sabun cair dengan variasi ekstrak daun ketapang yang dihasilkan telah memenuhi standar SNI 4085:2017.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-12-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10148
10.31315/e.v21i1.10148
Eksergi; Vol 21, No 1 (2024); 1-8
Eksergi; Vol 21, No 1 (2024); 1-8
2460-8203
1410-394X
10.31315/e.v21i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10148/pdf
Copyright (c) 2023 Nurfatihayati Nurfatihayati, Desi Heltina, Eden Putra, Fahrul Fajar Delef, Cory Dian Alfarisi, Drastinawati Drastinawati
oai:ojs.jurnal.upnyk.ac.id:article/376
2015-04-09T22:21:11Z
eksergi:ART
oai:ojs.jurnal.upnyk.ac.id:article/7543
2022-08-15T04:33:34Z
eksergi:ART
driver
Kinetika Pengolahan Limbah Cair Industri Tahu secara Biologi Menggunakan Biofilm dengan Sistem Batch
Jaya, Danang
Sulistyawati, Endang
Industri talru menghasilkan limbah cair yang bersifat biodegradable sehingga dapat diurai secara biologi dengan menggunakan mikroorgaínsme. Penelitian ini mempelajari kìnetika pertumbuhan bakteri Bacillus sphaerícvs dalam limbah cair orgonik tahu. Penelítían diløkukan dengan mengembangbiakkan bakteri Bacílllussphaericas dalam larutan 5,5 gram nuttrìen Agar dan l00mL aquades selama 44jam, dimasukkan kedalam 500 mL limbah cair tahu yang berisi 20 buah batu apung. Setiap selang waktu I atau 2 jam, diømbÍl I buah batu apung dan I0 mL substrat untuk diamatí absorbansinya menggunakan spectronic 20", sehingga dþerclehkonsentrasi bakleri dan konsentrasi substrat (dalam mg/mL). Parameter yang dipelajari adalah pengruh perubahan pH pada air limbah terhadap konstanta kecepatan pertumbuhan bakteri. Dari hasil penelitîan didapat nilai konstanta laju pertumbuhan spesifik keadaan jenuh (0.403 / jam), dan yield terbesar (0.593) pada pH7,5 yang merupakan pH optimum pertumbuhan bakteri Bocillussphaericus.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7543
10.31315/e.v9i1.7543
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 6-10
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 6-10
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7543/pdf
Copyright (c) 2022 Danang Jaya
oai:ojs.jurnal.upnyk.ac.id:article/2138
2018-01-01T18:47:11Z
eksergi:ART
driver
Pengaruh Penambahan Vermiculite Termodifikasi Cu2+ sebagai Media Imobilisasi Bakteri Anaerob pada Produksi Biogas terhadap Parameter Kinetika
Budianto, Gregorius Prima Indra
Sudjarwo, Wisnu Arfian Anditya
Anaerob; Immobilisasi Sel; Vermiculite
Modifikasi vermiculite dilakukan untuk meningkatkan afinitasnya sebagai media imobilisasi bakteri anaerob. Penelitian ini bertujuan untuk mempelajari pengaruh vermiculite termodifikasi Cu2+ dalam proses produksi biogas terhadap parameter kinetika. Penelitian ini dilakukan menggunakan tiga digester, yaitu digester tanpa penambahan vermiculite termodifikasi Cu2+, digester dengan penambahan vermiculite termodifikasi Cu2+ 0,01 mg/L dan digester dengan penambahan vermiculite termodifikasi Cu2+ 0,5 mg/L. Hasil yang diperoleh adalah semua digester dengan penambahan vermiculite termodifikasi Cu2+ sebanyak 40 g memberikan peningkatan pada nilai laju pertumbuhan spesifik bakteri asidogen dibandingkan dengan digester tanpa penambahan vermiculite termodifikasi yaitu sebesar 48 %. Penurunan laju pentumbuhan spesifik bakteri metanogen hanya terjadi pada digester dengan penambahan vermiculite termodifikasi Cu2+ 0,5 mg/L hingga 88,87 %.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2017-12-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2138
10.31315/e.v14i2.2138
Eksergi; Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 18-22
Eksergi; Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 18-22
2460-8203
1410-394X
10.31315/e.v14i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2138/pdf_25
oai:ojs.jurnal.upnyk.ac.id:article/8820
2023-04-10T03:14:43Z
eksergi:ART
driver
Kinetic and Thermodynamic Studies in Cellulose Acetate-Polybutylene Succinate(CA-PBS)/Single Solvent/Water System for Desalination Membrane
Nyamiati, Retno Dwi
Nurkhamidah, Siti
Rahmawati, Yeni
Meka, Wahyu
Membrane, Cloud Point, Solubility Parameter, Diffusivity, and Thermodynamic
The most important part of the membrane synthesis process so that it has the desired pores is the solidification process of the membrane, the process begins with a change from one liquid phase into two liquid phases (liquid-liquid demixing). At a certain period during demixing, the polymer-rich phase solidifies; thus, a dense membrane matrix is formed. Parameters that determine the mechanism of membrane formation are based on thermodynamics including phase separation of Solvent-Polymer-Non-solvent which is explained through a phase diagram (Flory-Huggins Theory). This study aims to determine the initial prediction of the formation of CA-PBS membranes with various solvents used and variations of non-solvents in the best system, which is proven by its characteristics and performance when applied to desalination membranes which include ternary diagrams using cloud point data, solubility parameters with Hansesn solubility, the solvent-non-solvent diffusivity using the Tyn Calus Equation approach and the morphological proofing of the membrane through SEM photos, and the performance of the resulting membrane through salt rejection and permeate flux. The results of the difference in solubility parameters are can be predicted that using DMF solvent on the CA-PBS membrane can reduce the pore size and eliminate voids and macrovoids in the membrane morphology.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
Ministry of Research, Technology and Higher Education of the Republic of Indonesia with contract’s number 008/E5/PG.02.00.PT/2022 and 1534/PKS/ITS/2022
2023-03-02
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8820
10.31315/e.v20i1.8820
Eksergi; Vol 20, No 1 (2023); 8-14
Eksergi; Vol 20, No 1 (2023); 8-14
2460-8203
1410-394X
10.31315/e.v20i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8820/pdf
Copyright (c) 2023 Retno Dwi Nyamiati, Siti Nurkhamidah, Yeni Rahmawati, Wahyu Meka
oai:ojs.jurnal.upnyk.ac.id:article/4551
2022-11-07T10:15:39Z
eksergi:ART
driver
Pretreatment Spirulina platensis Residue untuk Produksi Bioetanol
Anggorowati, Heni
Lestari, Indriana
Budiman, Arief
Pradana, Yano Surya
spirulina platensis residue, ultasonikasi, autoclave, α-amylase, amyloglucosidase
Pemerintah Indonesia berusaha untuk menggurangi penggunaan bahan bakar fosil dengan mendorong adanya transisi ke sumber energi terbarukan. Bioetanol merupakan salah satu alternatif energi terbarukan yang mampu mengurangi penggunaan bensin di sektor transportasi. Bioetanol dapat diproduksi dari spirulina platensis residu (SPR) yang masih mengandung karbohidrat yang tinggi. Untuk memaksimalkan perolehan bioethanol diperlukan proses pretreatment yang sesuai untuk memecah dinding sel SPR sehingga diperoleh glukosa yang siap difermentasi. Pada penelitian ini dilakukan tiga metode pretreatment yaitu ultrasonikasi, autoclave dan enzimatis. Pretreatment dengan ultrasonikasi dilakukan dengan ultasonicator batch 40 kHz selama 30 menit dan menghasilkan glukosa sebesar 147,1154 mg/L. Sedangkan dengan autoclave pada suhu 121 oC selama 30 menit menghasilkan glukosa sebesar 21.15385 mg/L. Pretreatmen enzimatis dilakukan dengan menggunakan kombinasi enzim α-amylase dan amyloglucosidase (1:0; 0,75: 0,25; 0,5:0,5; 0,25:0,75 dan 0:1) pada suhu 40 oC selama 180 menit. Yield glukosa maksimum diperoleh pada pengguanaan enzim α-amylase: amyloglucosidase = 0,25:0,75 yaitu sebesar 33,15%.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2021-04-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4551
10.31315/e.v0i0.4551
Eksergi; Vol 18, No 1 (2021); 7-12
Eksergi; Vol 18, No 1 (2021); 7-12
2460-8203
1410-394X
10.31315/e.v0i0
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4551/pdf
Copyright (c) 2021 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/336
2022-08-15T04:32:21Z
eksergi:ART
driver
Pengaruh Penambahan Aditif Proses Daur Ulang Minyak Pelumas Bekas terhadap Sifat-sifat Fisis
Siswanti, Siswanti
minyak pelumas bekas; proses daur ulang; aditif; phenol; nitrobenzen.
Peningkatan jumlah kendaraan bermotor dan industri menyebabkan pemakaian minyak pelumas meningkat, akibatnya jumlah minyak pelumas bekas semakin meningkat. Hal ini jika dibiarkan dapat menyebabkan pencemaran lingkungan. Sehingga dengan memanfaatkan kembali minyak pelumas bekas dapat mengurangi pencemaran lingkungan dan mengurangi konsumsi minyak bumi. Salah satu cara pengolahan minyak pelumas bekas adalah dengan proses daur ulang. Minyak pelumas bekas hasil daur ulang memiliki mutu yang kurang baik, sehingga perlu ditingkatkan mutunya dengan menambahkan zat aditif. Proses daur ulang dilakukan dengan cara menghilangkan zat pengotor yang terkandung dalam minyak pelumas bekas menggunakan asam sulfat pekat kemudian ducuci dengan larutan deterjen dan ditambah CaCl2 sebagai pemecah emulsi. Selanjutnya untuk meningkatkan mutunya ditambah dengan aditif yaitu nitrobenzen dan phenol dengan perbandingan 1 :1 pada suhu 70 oC. Kondisi terbaik yang diperoleh dalam penelitian ini adalah perbandingan aditif dengan minyak pelumas hasil daur ulang 1,5 :1 untuk waktu pemakaian di dalam mesin gergaji kayu selama 6 jam.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-11-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/336
10.31315/e.v10i2.336
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 27-31
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 27-31
2460-8203
1410-394X
10.31315/e.v10i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/336/286
oai:ojs.jurnal.upnyk.ac.id:article/7576
2022-08-15T04:33:16Z
eksergi:ART
driver
Metanolisis Minyak kelapa dengan Katalis Enzim Lipase dalam Bubuk Getah Pepaya (Carica Papaya Latex, CPL)
Sukadarti, Sri
Kholisoh, Siti Diyar
This research was aimed to obtain an alternative way for manufacturing methyl ester which is cheaper with a quality that meets the standards. According to its availability and abundance in Indonesia, coconut palm oil was applied as the raw material and lipase enzyme in papaya latex was used as its catalyst.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1-5
10.31315/e.v9i1.7576
Eksergi; Vol 9, No 1 (2009): Versi Cetak
Eksergi; Vol 9, No 1 (2009): Versi Cetak
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1-5/pdf
Copyright (c) 2022 Sri Sukadarti, Siti Diyar Kholisoh
oai:ojs.jurnal.upnyk.ac.id:article/2453
2022-03-29T08:25:03Z
eksergi:ART
driver
Mapping and Analysis Experiment on Film Thickness Reducing in Gas Diffusion Layers of PEM Fuel Cell
Pemetaan dan Analisis Penelitian Pengurangan Tebal Lapisan film pada Lapisan diffusi gas PEM Fuel Cell
Sitanggang, Ramli
lapisan tipis GDL; pengurangan lapisan; carbon density; ukuran lapisan; prestasi lapisan tipis
One way to reduce the cost of making PEM Fuel Cells is to reduce the thickness of the layer. The layer is located between GDL and PEMFC electrode. This layer, to refute the electrode, is expressed with thickness, porosity, pore diameter, active surface area. In this working paper, the results of the thin film research results have been mapped and the results of the tests are to determine the characteristics of the thin layer thickness reduction. The mapping and analysis results were obtained at thicknesses ranging from 250 µm. In testing the thickness of 250 µm can still be reduced by a spray machine of 145 µm with a carbon density of about 2 mg cm-2 , but PEMFC's performance is smaller than the achievement of 250 µm thick.
ABSTRAK: Salah satu cara untuk mengurangi biaya pembuatan PEM Fuel Cell adalah mengurangi tebal lapisan. Lapisan terletak diantara GDL dengan elektrode PEMFC. Lapisan ini, untuk menyanggah elektrode yang dinyatakan dengan tebal, porositas, diameter pori, luas permukaan aktif. Pada kertas kerja ini, dilakukan pemetaan hasil hasil penelitian lapisan tipis yang sudah dilaporkan dan hasil pengujian untuk mengetahui karakteristik pengurangan ketebalan lapisan tipis tersebut. Hasil pemetaan dan analisis didapatkan pada ketebalan berkisar 250 µm. Dalam pengujian ketebalan 250 µm masih dapat dikurangi dengan mesin sepray sekitar 145 µm dengan densitas karbon sekitar 2 mg cm-2., tetapi prestasi PEMFC lebih kecil dari prestasi tebal 250 µm. Kata Kunci: lapisan tipis GDL; pengurangan lapisan; carbon density; ukuran lapisan; prestasi lapisan tipisABSTRACT: One way to reduce the cost of making PEM Fuel Cells is to reduce the thickness of the layer. The layer is located between GDL and PEMFC electrode. This layer, to refute the electrode, is expressed with thickness, porosity, pore diameter, active surface area. In this working paper, the results of the thin film research results have been mapped and the results of the tests are to determine the characteristics of the thin layer thickness reduction. The mapping and analysis results were obtained at thicknesses ranging from 250 µm. In testing the thickness of 250 µm can still be reduced by a spray machine of 145 µm with a carbon density of about 2 mg cm-2, but PEMFC's performance is smaller than the achievement of 250 µm thick.Keywords: GDL thin layer; layer reduction; carbon density; layer size; thin layer performance
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2018-11-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2453
10.31315/e.v15i2.2453
Eksergi; Vol 15, No 2 (2018): Vol. 15 No.2 (2018); 59-67
Eksergi; Vol 15, No 2 (2018): Vol. 15 No.2 (2018); 59-67
2460-8203
1410-394X
10.31315/e.v15i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2453/pdf
Copyright (c) 2018 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/9681
2023-07-14T03:54:14Z
eksergi:ART
driver
Utilization of Kepok Banana Peel Activated Carbon and Nipa Shell Activated Carbon as Biosorbents for Laundry Wastewater Treatment
Pemanfaatan Karbon Aktif Kulit Pisang Kepok dan Karbon Aktif Tempurung Nipah sebagai Biosorben untuk Pengolahan Limbah Cair Laundry
Fadlilah, Ilma
Pramita, Ayu
Triwuri, Nurlinda Ayu
Anggorowati, Heni
Activated Carbon; SEM-EDX; Nipa shell; Kepok Banana Peel; Adsorption Kinetics
Karbon Aktif; SEM-EDX; Tempurung Nipah; Kulit Pisang Kepok; Kinetika Adsorpsi
The use of kepok banana peel activated carbon (AC-KPK) and nipa shell activated carbon (AC-TN) to adsorb phosphate ions in laundry waste has been successfully carried out. Characterization of activated carbon was carried out with SEM-EDX. The results of the morphological analysis showed that the pore sizes in AC-KPK and AC-TN were included in the macropore category. The elemental content of the AC-KPK adsorbent is C 74.9%; 23.6% O and 1.5% K, whereas in the AC-TN adsorbent it was observed that C elements were 70.7%; O 25.5%; K 2.0% and other elements such as Ca, Na, Mg and Cl are contained in small quantities. The optimum contact time needed by AC-KPK to adsorb phosphate ions in laundry wastewater is 15 minutes with an adsorption efficiency of 98.83%, the AC-TN adsorbent is 5 minutes with an adsorption efficiency of 99.52%, and the combination of AC-KPK&AC- TN resulted in a contact time of 5 minutes with an adsorption efficiency of 99.91%. The adsorption kinetics of phosphate ions with the three adsorbent media followed the pseudo second order model with adsorption rates for the adsorbents AC-KPK, AC-TN, and the combination AC-KPK & AC-TN respectively 3.9400 g/mg.min; -28.7119 g/mg.minute; and -10.8895 g/mg.min.
Penggunaan karbon aktif kulit pisang kepok (AC-KPK) dan karbon aktif tempurung nipah (AC-TN) untuk mengadsorpsi ion fosfat dalam limbah laundry telah berhasil dilakukan. Karakterisasi karbon aktif dilakukan dengan SEM-EDX. Hasil analisis morfologi menunjukkan ukuran pori pada AC-KPK dan AC-TN termasuk dalam kategori makropori. Kandungan unsur pada adsorben AC-KPK adalah C 74,9%; O 23,6% dan K 1,5%, sedangkan pada adsorben AC-TN teramati bahwa unsur-unsur C 70,7%; O 25,5%; K 2,0% dan elemen lain seperti Ca, Na, Mg, dan Cl dalam jumlah kecil terkandung di dalamnya. Waktu kontak optimum yang dibutuhkan AC-KPK untuk mengadsorpsi ion fosfat dalam limbah cair laundry adalah 15 menit dengan efisiensi adsorpsi sebesar 98,83%, adsorben AC-TN adalah 5 menit dengan efisiensi adsorpsi sebesar 99,52%, dan kombinasi AC-KPK&AC-TN menghasilkan waktu kontak 5 menit dengan efisiensi adsorpsi 99,91%. Kinetika adsorpsi ion fosfat dengan ketiga media adsorben mengikuti model pseudo second order dengan nilai kecepatan adsorpsinya untuk adsorben AC-KPK, AC-TN, dan kombinasi AC-KPK & AC-TN berturut-turut adalah 3,9400 g/mg.min; -28,7119 g/mg.min; dan -10,8895 g/mg.min.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-07-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9681
10.31315/e.v20i2.9681
Eksergi; Vol 20, No 2 (2023); 118-123
Eksergi; Vol 20, No 2 (2023); 118-123
2460-8203
1410-394X
10.31315/e.v20i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9681/pdf_1
Copyright (c) 2023 Ilma Fadlilah, Ayu Pramita, Nurlinda Ayu Triwuri
oai:ojs.jurnal.upnyk.ac.id:article/4564
2022-11-07T10:13:06Z
eksergi:ART
driver
Renewable Energy from Pyrolysis of Pine Wood with Zeolite Catalyst
Achmad, Zubaidi
Arsa, Abdullah Kunta
Alfitamara, Bety
Virgiandini, Alfia
Renewable energy becomes a hot issue on the decrease of fossil energy reserves that can not be renewed. To answer the challenge of the availability of these energy a study was performed in a high-temperature cracking process from pine wood to obtain fuel oil or so-called pyrolysis. The purpose of this study was to determine the yield, physical properties, and the calorific value of the pyrolysis results. Pyrolysis process is done by varying the percentage of mordenite-type zeolite catalyst as much as 0% b/b, 2% b/b, and 4% b/b, with a mass of 100 grams of pine wood that passes sieving each sample to 50 mesh. Before use, the catalysts physically activated by heating at a temperature of 500°C and chemically activated using HCl to enhance the activity of the zeolite. Pyrolysis carried out at 400°C, 450°C, 500°C, and 550°C. After the analysis, bio-oil obtained optimum yield of 43.77142% by mass of the catalyst 4% b/b and a temperature of 500 °C. Physical properties obtained in the form of density 1.094723 g/ml, 2.96 cP viscosity, and 58°C flash point. While the highest calorific value on the condition of the catalyst 4% and the reaction temperature 550°C is 26045.50 kJ/kg.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-04-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4564
10.31315/e.v19i1.4564
Eksergi; Vol 19, No 1 (2022); 1-5
Eksergi; Vol 19, No 1 (2022); 1-5
2460-8203
1410-394X
10.31315/e.v19i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4564/pdf
Copyright (c) 2022 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/1357
2015-12-11T00:44:50Z
eksergi:ART
driver
Co-Digestion of Vinasse Waste and Tofu Liquid Waste to Increase Biogas Production
Syaichurrozi, Iqbal
Biogas; Tofu Liquid Waste; Vinasse Waste; Co-digestion
The purpose of this study was to increase biogas production using co-digestion concept. Vinasse Waste (VW) containing high COD and low total Nitrogen content was mixtured with Tofu Liquid Waste (TLW) containing low COD and high total Nitrogen. Substrates were varied with volume ratio of VW:TLW of 100:0, 20:80, 0:100. Total volume of substrates was 250 mL. Anaerobic digesters were operated at room temperatur. After fermentation, biogas total volume of variables of 100:0, 20:80, 0:100 was 88.5; 125.5; 41.5 mL. Initial pH for all variables was 7.0. At the end of fermentation, pH substrates became 3.9; 5.1; 6.8 for variables of 100:0, 20:80, 0:100 respectively.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2015-12-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1357
10.31315/e.v12i2.1357
Eksergi; Vol 12, No 2 (2015); 23-28
Eksergi; Vol 12, No 2 (2015); 23-28
2460-8203
1410-394X
10.31315/e.v12i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1357/pdf_iqbal
oai:ojs.jurnal.upnyk.ac.id:article/10033
2024-02-19T03:56:25Z
eksergi:ART
driver
Studi Isoterm Adsorbsi dan Termodinamika Pada Proses Penyisihan Ion Fe (III) Menggunakan Pektin dari Kulit Pisang
Lestari, Indriana
Ristianingsih, Yuli
Istiani, Alit
Anasstasia, Titi Tiara
pectin; Fe3+ ions; isotherm adsorbtion; thermodynamic; banana peels
Adsorben berupa pektin berhasil diekstraksi dari kulit pisang menggunakan larutan asam kuat dan telah digunakan untuk menyisihkan ion Fe3+ dalam air. Pengaruh berbagai parameter terhadap proses adsorbsi, seperti waktu kontak, pH larutan, dosis adsorben, dan temperatur adsorbsi diinvestigasi dalam suatu sistem batch. Konsentrasi ion Fe3+ dalam larutan air diukur menggunakan Atomic Absorption Spectrometry . Efisiensi adsorbsi terbaik diperoleh pada waktu kontak selama 4 jam, pH larutan 2, dosis adsorben sebesar 3 g, dan temperatur 20oC. Mekanisme proses adsorbsi dan perubahan energi bebas Gibbs, entalpi, serta entropi telah dievalusi. Model isoterm Freundlich dan Temkin paling sesuai untuk menggambarkan mekanisme adsorbsi ion Fe3+ pada pektin dengan R2 berturut-turut 0,9871 dan 0,9591. Data parameter termodinamika membuktikan bahwa adsorpsi ion Fe3+ bersifat eksotermis dan berlangsung secara tidak spontan pada rentang temperatur 20 hingga 60ᵒC. Penelitian ini menunjukkan bahwa kulit pisang dapat dimanfaatkan sebagai adsorben murah yang menjanjikan untuk menghilangkan ion Fe3+ dalam air.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10033
10.31315/e.v20i3.10033
Eksergi; Vol 20, No 3 (2023); 184-190
Eksergi; Vol 20, No 3 (2023); 184-190
2460-8203
1410-394X
10.31315/e.v201i3
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10033/pdf
Copyright (c) 2023 Indriana Lestari, Yuli Ristianingsih
oai:ojs.jurnal.upnyk.ac.id:article/320
2014-10-29T09:43:26Z
eksergi:ART
oai:ojs.jurnal.upnyk.ac.id:article/7286
2022-11-07T10:12:47Z
eksergi:ART
driver
Mass Transfer Coefficient Extraction of Oleoresin from Zodia Leaf (Evodia suaveolens) with Ethanol Solvent Using Ultrasonic Cleaner
Siswanti, Siswanti
Saviatri, Ratri
Adi Pratama, Jeremy
The Aedes sp mosquito is a vector of Dengue Hemorrhagic Fever (DHF) and chikungunya which are still commonly found in Indonesia. To control DHF, natural insecticides from plants can be used. Zodia plants (Evodia suaveolens) can be used as natural insecticides because they contain essential oils that mosquitoes do not like. To obtain oleoresin with optimal quality and quantity, extraction can be carried out using ultrasonic waves. To design an efficient extractor, mass transfer coefficient data is needed. Until now, the data is still difficult to obtain. The experiment was carried out using an ultrasonic cleaner, by observing the concentration of oleoresin for various leaf mass ratios of 4, 6, 8, 10, and 12 grams, extracted with 300 mL ethanol for 900 seconds. Concentration observations were also carried out for a time variation of 90 - 900 seconds, with 90 seconds intervals. The best extraction results were tested using GC-MS, to determine the components in the oleoresin. To determine the mass transfer coefficient (Kc) is to make a relationship between concentration and time for the best ratio of leaf weight and ethanol volume.Based on research that has been done with 300 mL of ethanol and extraction time of 900 seconds, the highest concentration was 0.0120 gr/mL, for the experiment using a leaf weight of 12 gr. The largest percentage (%) of oleoresin that could be extracted was 88.5%, for the experiment the leaf weight was 2 g. The optimum mass transfer coefficient (Kc) is 0.161088 1/minute. These data were obtained for the experiment of the relationship between concentration and time. Oleoresin from Zodia leaves contains 20.61% nerolidol. This compound has effectiveness as a mosquito repellent.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-07-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7286
10.31315/e.v19i2.7286
Eksergi; Vol 19, No 2 (2022); 63-70
Eksergi; Vol 19, No 2 (2022); 63-70
2460-8203
1410-394X
10.31315/e.v19i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7286/pdf
Copyright (c) 2022 Siswanti Siswanti, Ratri Saviatri, Jeremy Adi Pratama
oai:ojs.jurnal.upnyk.ac.id:article/1694
2017-08-03T15:02:25Z
eksergi:ART
driver
Robotic spraying application for Fabrication Proton Exchange Membrane Fuel Cell
Sitanggang, Ramli
Sprayer, MEA design, fabrication, Fuel cell
One of the processes that work in the field of engineering Proton Exchange Membrane Fuel Cell (PEMFC) is to produce a variety of designs MEA. The best design will be found in the manufacturing process. The project introduced a spray with a robotic instrument configuration x-y axis to issue MEA design. MEA layer forms which can be produced by this spray will follow a periodic function, whereas the layers including the thickness, porosity, pore diameter, specific active surface area which will be used to hold the chemical reaction to produce electricity. The character size coating layer is represented by the amount of spraying. This number is a function of the frequency of the robot, and the nozzle crosses the x-y dimensions of the substrate. Sprays produce two forms of MEA design. From the results of this study MEA quality can be assessed using a robot with a spray nozzle configuration as a contribution for Fuel Cell (PEMFC).
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
Universitas Pembangunan Nasional "Veteran" Yogyakarta
2017-07-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1694
10.31315/e.v13i2.1694
Eksergi; Vol 13, No 2 (2016); 20-26
Eksergi; Vol 13, No 2 (2016); 20-26
2460-8203
1410-394X
10.31315/e.v13i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1694/pdf_19
oai:ojs.jurnal.upnyk.ac.id:article/8008
2022-11-18T06:48:30Z
eksergi:ART
driver
Mass Transfer Coefficient of Extraction of Anthocyanin from Mangosteen Peel (Garcinia mangostana L.) with Ethanol-HCl as Solvent
Achmad, Zubaidi
Hadi, Faizah
Kholisoh, Siti Diyar
Anthocyanins; batch extraction; mangosteen peel; mass transfer coefficient; solvent
Anthocyanin is a natural pigment that causes the purple skin of the mangosteen fruit. This study aimed to observe the effect of temperature, stirring time, and ethanol concentration in ethanol–HCl solvent on anthocyanins produced from the mangosteen peel extraction process and determine the value of its mass transfer coefficient. The laboratory work was conducted with mangosteen peel powder extracted with ethanol solvent containing 1% HCl solution using an extraction apparatus set. The mangosteen rind is cleaned and then mashed until it passes the size of -60+80 mesh. Then 50 g of mangosteen rind powder was put into a three-neck flask along with ethanol solution with various concentrations of 55%, 65%, 75%, 85%, and 95%, each containing 1% HCl. Extraction was carried out at various stirring times of 3, 4, 5, 6, and 7 hours with temperature variations of 30, 40, 50, 60, and 70oC. Each product was distilled at a temperature of <60oC. Anthocyanin content were analyzed by spectrophotometric method. The results showed that the optimum conditions at the extraction temperature of 50oC with stirring time for 4 hours and 95% ethanol concentration in ethanol–HCl solvent with anthocyanin content obtained of 9,8377.10-4 (g anthocyanin/g solvent) and kC of 0,00781 g/(cm2.hour).
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-11-13
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8008
10.31315/e.v19i3.8008
Eksergi; Vol 19, No 3 (2022); 140-147
Eksergi; Vol 19, No 3 (2022); 140-147
2460-8203
1410-394X
10.31315/e.v19i3
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8008/pdf
Copyright (c) 2022 Zubaidi Achmad, Faizah Hadi, Siti Diyar Kholisoh
oai:ojs.jurnal.upnyk.ac.id:article/3828
2022-11-07T10:29:53Z
eksergi:ART
driver
POST-COMBUSTION COAL DESULFURIZATION Review
Yuniar, Silky Amanda
Nursanto, Edy
Ernawati, Rika
acid rains; coal; desulfurizization; electrochemical desulfurization
The sulfur content in coal ranges from 0.5 to 5%, and it is an impurity that must be removed before burning coal, due to the toxic effects and acid rain caused by SO2 gas generated from sulfur oxidation. Sulfur cleaning technology can be carried out on coal before combustion (pre-combustion), and can reduce the inorganic sulfur content by up to 50%; however, it cannot reduce the organic sulfur content. Therefore, the industry relies on post-combustion desulfurization to remove SO2 from the gas from coal combustion. The aim of the coal desulfurization review is to direct desulfurization research to be efficient and effective, as well as to be environmentally friendly. Sulfur in coal consists of organic sulfur and inorganic sulfur. Coal inorganic sulfur consists of pyrite (FeS2), sulfate, and sulfide. The largest composition is pyrite. Organic sulfur consists of hetero-atomic and heterocyclic (thiophenic) macromolecules that bind N and O atoms, aromatic sulfides, and aromatic disulfides (small amounts). Inorganic sulfur can easily be separated from coal by means of flotation, microwave energy, magnetic forces, ultrasonic energy, and as well as microorganisms. Meanwhile, organic sulfur cannot be separated from coal by using the methods used in the inorganic sulfur separation process. Organic sulfur can be removed by chemical and biodesulfurization, however, this process is inefficient for industrial scale. The most recommended method is the absorption of SO2 gas in the gas from coal combustion, or post-combustion desulfurization. Various methods have also been investigated to separate SO2 gas, and more details will be described in this paper.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2020-12-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3828
10.31315/e.v17i2.3828
Eksergi; Vol 17, No 2 (2020); 79-85
Eksergi; Vol 17, No 2 (2020); 79-85
2460-8203
1410-394X
10.31315/e.v17i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3828/pdf
Copyright (c) 2020 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/11761
2024-03-29T04:05:28Z
eksergi:ART
driver
Optimalisasi Mutu Batubara Indonesia: Kajian Metode dan Potensi dalam Peningkatan Nilai Kalor Batubara
Febriani, Annisa Vada
Hanum, Farrah Fadhillah
Kuncara, Jaka
Setyawan, Martomo
Batubara; Nilai kalori; Teknologi; Pengeringan; Upgrading
Nilai kalori batubara sangat penting bagi batubara itu sendiri. Selain berpengaruh pada proses pembakaran, nilai kalori juga menunjukkan kandungan energi yang terkandung dalam batubara. Nilai kalori batubara dipengaruhi oleh beberapa parameter diantaranya ialah kelembapan, kadar abu, zat terbang, karbon tetap dan total sulfur. Namun 40% cadangan batubara di Indonesia masih kualitas rendah. Hal ini menunjukan perlu adanya teknologi peningkatan nilai kalori yang sesuai, dengan tujuan batubara kualitas rendah ini dapat digunakan secara maksimal serta mengurangi emissi CO2 yang dikeluarkan selama proses pembakaran di PLTU. Teknologi pengeringan batubara menjadi salah satu teknologi peningkatan nilai kalori batubara, dengan konsep pengurangan kadar air yang dipengaruhi oleh suhu dan tekanan. Teknologi ini terbagi menjadi empat kategori yaitu mekanis, evaporasi, non-evaporasi dan pirolisis. Sesuai dengan program hilirisasi kementrian ESDM tentang pemanfaatan batubara, teknologi yang dikembangkan dalam proses upgrading batubara adalah teknologi UBC (Upgrading Brown Coal) dan teknologi CDB (coal dry briquette). Selain itu campuran batubara kualitas rendah dengan biomassa juga dimanfaatkan menjadi bahan bakar pembangkit listrik atau sering disebut co-firring. Baik diaplikasikan langsung maupun dibentuk menjadi briket. Program ini dijalankan untuk mendorong Program NZE pemerintah yang berkomitmen untuk mencapai nol emisi CO2 di tahun 2050.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2024-03-23
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/11761
10.31315/e.v21i2.11761
Eksergi; Vol 21, No 2 (2024); 70-76
Eksergi; Vol 21, No 2 (2024); 70-76
2460-8203
1410-394X
10.31315/e.v21i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/11761/pdf
Copyright (c) 2024 Annisa Vada Febriani, Farrah Fadhillah Hanum, Jaka Kuncara, Martomo Setyawan
oai:ojs.jurnal.upnyk.ac.id:article/329
2014-12-07T17:16:00Z
eksergi:ART
driver
Pengaruh Oil Sludge Pertamina Surabaya Terhadap Kuat Tekan Keramik Tradisional
Ilcham, Adi
compressive strength; oil sludge; traditional ceramic; waste
Oil sludge is the solidifying oils that lying on the open space around the fuel storage tank. Heaps of the waste continues to increase could lead to environmental pollution due to the waste containing heavy metal. This research aims to study the effect of oil sludge on the compressive strength of traditional ceramics within range of sintering temperature (600- 1000 0 C), sintering time (1-3 hours), and raw material compositions. The experiment begins by mixing the ceramic raw materials. Material was mixed with water and milled using Mortar Hand (milling). A cermic mold was used to get ceramic specimens. The mold dimension is length of 8 cm, 4 cm wide, and 2 cm high. The specimens were sintered in a furnace at different temperatures and holding time. Finally, the ceramics were observed its compressive strength. The results showed that the waste oil sludge can be involved in the manufacture of traditional ceramics. In the view of the compressive strength, the best conditions for fabricating traditional ceramics are oil sludge of 16.67% w., sintering temperature of 800 0 C, and sintering time of 2.5 hours.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-10-29
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/329
10.31315/e.v11i1.329
Eksergi; Vol 11, No 1; 11-15
Eksergi; Vol 11, No 1; 11-15
2460-8203
1410-394X
10.31315/e.v11i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/329/281
oai:ojs.jurnal.upnyk.ac.id:article/7556
2022-08-15T04:33:34Z
eksergi:ART
driver
Modulus Patah dan Penyerapan Air pada Genteng Beton dari Tbas, Batu Apung dan Kapur Padam dengan Variasi
Nuri, Wasir
Di Indonesiaîerdapat sumber dryø alamyang cakup baryak antara lain tras, batu apung danbatu kapun bahan tersebut dapat digunakan sebagaí bahan bangunan, jika ketiga bahan tersebatdicampur dan dítambah air maka akan menjadi keras dan cuhrp htat dígunakon sebagai bahan bongunan.Penelitían ini bertujuan mencari modulrc patah dan penyerapan air yang memenuhí Standard InùtstriIndonesia pada genteng beton dari campuran tras, batu apung dan kapur padam dengan varíasikomposisi. Campuran tras dan kapur pødamr dengan perbandingan 10 : 4 ditambah batu apung dengankomposisi bemaríasi dari nol sompaí dengan 42,5 prosen berat, dengan ukuran diameter butir lolosayakan 100 mesh dan 200 mesh, campuran ditambah aír sambil diaduk sampaí adonan menjadi plastßhemudíandicetakdenganukuranT,Sx6,6x2cm,sEnplekemudíandiperamselama2l hari,setelahkzringselaniunya dilalwkan uji terhadap modulus pøtah dan penyerapan ain Hasíl uji terhadap modulus pøahmalrsimum adalah 10,2 kg / cm'1 pada ukuran butir 200 mesh sedangkan peresapan terhadap aìr minimumadalah0,l6 gramper cm'padaukuranbutir I00meshdalamwaktu2t hari. Moduluspatah-danperesapanaír masih dibautah standart SII sebagai genteng beton, sehingga perlu penelitian lebih lanjut misalnyawaklu pemeraman atau ditambahkan semen Portland.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7556
10.31315/e.v9i1.7556
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 65-69
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 65-69
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7556/pdf
Copyright (c) 2022 Wasir Nuri
oai:ojs.jurnal.upnyk.ac.id:article/2327
2018-11-14T09:55:09Z
eksergi:ART
driver
EFFECT OF pH ON LIQUID-PHASE MASS TRANSFER AND DIFFUSIVITY COEFFICIENT AT LEACHATE TREATMENT OF MUNICIPAL WASTE LANDFILL IN ANAEROBIC BIOREACTOR
Kahar, Abdul
Warmadewanthi, IDAA
Hermana, Joni
anaerobic bioreactor, diffusivity leachate, mass transfer
Leachate is a liquid waste resulted from physical, biological and chemical decomposition of landfill waste. Leachate contains complex dissolved organic and anorganic substrate which are biodegradable and non-biodegradable. Anaerobic treatment principally utilizes anaerobic bacteria in order to degrade the dissolved organic substance into biogas. Anaerobic treatment is very sensitive towards the substrate cocentration, temperature, and pH. This research used anaerobic bioreactor with the volume of 160 L, the ratio of the leachate: biogas is 70:30. Seeding and acclimatization steps were done, respectively for 10 days, leachate treatment was done in 21 days. Seeding, acclimatization, and leachate treatment were done on the pH ambience of 7.2 and 8.0 and ambient temperature. COD and VFA analysis were done every two days. The objective of this research is to decide the pH effect on the coefficient of liquid-phase mass transfer: kL, and the diffusivity of the dissolved substace, DL. pH affects the degradation of the concentratio of dissolved organic substrate in the leachate. The higher the pH is, the higher the obtained VFA concentration is. VFA concentration is affected by pH; however, it still considers the optimal pH condition of the substrate biodegradation. pH affects the average rate of mass transfer, rkL and diffusivity of the dissolved substance, DL in the anaerobic treatment of leachate. pH affect the concentration of dissolved organic substrate which subsequently influenes the coefficient of liquid-phase mass transfer of the leachate, kL and the diffusivity of the dissolved substance, DL. The higher the pH is, the more increasing the kL is and the more decreasing the DL is.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2018-11-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2327
10.31315/e.v15i2.2327
Eksergi; Vol 15, No 2 (2018): Vol. 15 No.2 (2018); 24-33
Eksergi; Vol 15, No 2 (2018): Vol. 15 No.2 (2018); 24-33
2460-8203
1410-394X
10.31315/e.v15i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2327/2119
Copyright (c) 2018 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/9727
2023-07-14T03:54:14Z
eksergi:ART
driver
The Effect of Temperature and Time of Drying from Corn Starch Bioplastic on Biodegradation Time
Pengaruh Suhu dan Waktu Pengeringan Pada Bioplastik dari Pati Jagung Terhadap Waktu Biodegradasi
Syamsyyah, Mirra Amanda
Sari, Myra Wardati
Cengristitama, Cengristitama
Nurdini, Lulu
bioplastic; corn starch; temperature; degradation time
bioplastik, pati jagung, temperatur, waktu degradasi
The disposal plastic waste into the environtment is an important issue due to the natureof the origin of plastics that are difficult to decomposes naturally. Therefore, efforts are made to accelerate the degradation time by using natural polymers. Corn is one of the easily found sources of starch. Starch is one of the natural polymres that can be used for the manufacture of biodegradable plastics (bioplastics) because it is easily degradable, readily available and affordable but has shortcomings in mechanical properties and water absorption ability.The purpose of this study was to observe the effect of temperature variations 60; 70; 80 and 90°C with a drying time of 1; 2; 3 and 4 hours of biodegradation time. From this study, the best results were found at a temperature of 60°C with a drying time of 1 hour which obtained a degradation time of 5 days; average thickness 0.12 mm – 0.30 mm; the overall average water absorption is 4.04% and the average water resistance is 95.99%; tensile strength of 5.69 MPa and 5.54 MPa; elongation at break of 4% and 1.6%.
Masalah lingkungan dari pembuangan limbah plastik menjadi isu penting karena sifatnya yang sulit diuraikan. Oleh karena itu, dilakukan upaya untuk mempercepat tingkat degradasi dengan penggunaan polimer alami. Jagung merupakan salah satu sumber pati yang mudah ditemukan. Pati merupakan salah satu polimer alami yang dapat digunakan untuk pembuatan plastik biodegradable karena sifatnya yang mudah terdegradasi, mudah didapatkan dan terjangkau tetapi memiliki kekurangan pada sifat mekanis dan kemampuan menyerap air. Tujuan dari penelitian ini adalah dilakukan pengamatan terhadap pengaruh variasi suhu 60; 70; 80 dan 90 ˚C dengan waktu pengeringan 1; 2; 3 dan 4 jam terhadap waktu biodegradasi. Dari penelitian ini diperoleh hasil terbaik terdapat pada perlakuan suhu 60 ˚C dengan waktu pengeringan 1 jam yang memperoleh waktu degradasi selama 5 hari; ketebalan rata – rata 0,12 mm – 0,30 mm; rata – rata keseluruhan serapan air sebesar 4,04 % dan ketahanan air rata – rata sebesar 95,99 %; kuat tarik 5,69 MPa dan 5,54 Mpa; perpanjangan putus 4 % dan 1,6 %
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-07-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9727
10.31315/e.v20i2.9727
Eksergi; Vol 20, No 2 (2023); 76-81
Eksergi; Vol 20, No 2 (2023); 76-81
2460-8203
1410-394X
10.31315/e.v20i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9727/pdf
Copyright (c) 2023 Myra Wardati Sari
oai:ojs.jurnal.upnyk.ac.id:article/4725
2023-01-15T05:33:08Z
eksergi:ART
driver
Modification of Natural Zeolite to ZSM-5 as CO2 Adsorber
Modifikasi Zeolit Alam Menjadi ZSM-5 Sebagai Penjerap CO2
Budianto, Gregorius Prima Indra
Biogas; adsorpsi; CO2; zeolit alam; ZSM-5.
Biogas is a product of the bio-decomposition process in anaerobic conditions. Methane (CH4) and carbon dioxide (CO2) are the compounds of biogas that act in determining the quality of biogas. When the CH4 level is high, the biogas will have a high caloric value; conversely, the increased CO2 levels result in low biogas heating value. One effort to purify biogas is the adsorption process using natural zeolite. Natural zeolite should be modified into ZSM-5 because it has a greater pore diameter than natural zeolite. It is expected that the increase of the efficiency of CO2 adsorption is more significant than natural zeolite. ZSM-5, which is altered from natural zeolite, will be compared to the effectiveness of CO2 adsorption compared to natural zeolite
iogas merupakan produk dari proses penguraian bahan-bahan organik oleh mikroorganism dalam kondisi tanpa udara (anaerob). Dari semua unsur biogas yang berperan dalam menentukan kualitas biogas yaitu gas metana (CH4) dan gas karbon dioksida (CO2). Bila kadar CH4 tinggi maka biogas tersebut akan memiliki nilai kalori yang tinggi. Sebaliknya jika kadar CO2 yang tinggi maka akan mengakibatkan nilai kalor biogas tersebut rendah. Salah satu usaha yang dapat dilakukan untuk memurnikan biogas adalah dengan proses adsorpsi semisal dengan zeolit. Dalam rangka meningkatkan efisiensi penjerapan CO2, modifikasi zeolit diperlukan. Pada penelitian ini digunakan zeolite hasil modifikasi yang dikenal dengan ZSM-5. Zeolite ZSM-5 hasil sintesis memiliki diameter pori yang lebih besar dari pada zeolit alam sehingga diharapkan peningkatan efisiensi penjerapan gas CO2 lebih besar dibandingkan dengan zeolite alam. Zeolit ZSM-5 yang telah diubah dari zeolit alam akan dibandingkan tingkat efektivitas penjerapan gas dibanding zeolit alam dan sintesis zeolit ZSM-5.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2021-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4725
10.31315/e.v18i2.4725
Eksergi; Vol 18, No 2 (2021); 60-64
Eksergi; Vol 18, No 2 (2021); 60-64
2460-8203
1410-394X
10.31315/e.v18i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4725/pdf
Copyright (c) 2021 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/343
2015-09-18T03:35:57Z
eksergi:ART
driver
Analisis Mutu Biosolar pada Variasi Formulasi Blending Biodiesel dari Minyak Kapuk dengan Minyak Solar
Haryono, Haryono
Marliani, Marliani
Biodiesel; blending; formulasi; minyak solar
Minyak solar merupakan jenis bahan bakar minyak untuk mesin diesel yang bersifat tidak terbarukan. Diperlukan upaya untuk mengurangi ketergantuan terhadap minyak solar. Salah satu energi alternatif sebagai upaya pengurangan ketergantungan tersebut adalah biodiesel. Namun biodiesel dalam keadaan murni (B100) memiliki beberapa kekurangan jika digunakan dalam keadaan murni. Tindakan umum yang dilakukan untuk mengatasi kekurangan B100 sebagai bahan bakar adalah dilakukan blending dengan minyak solar pada formulasi blending tertentu.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-12-28
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/343
10.31315/e.v11i2.343
Eksergi; Vol 11, No 2; 24-29
Eksergi; Vol 11, No 2; 24-29
2460-8203
1410-394X
10.31315/e.v11i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/343/pdf
oai:ojs.jurnal.upnyk.ac.id:article/7609
2022-08-15T04:32:42Z
eksergi:ART
GRID CONNECTED SOLAR HYDROGEN ENERGY SYSTEM
Marnoto, Tjukup
Solar-Hydr-ogen energy system has been regarded æ ttre future energy system that is clean, environmental-friendly, availability of renewable energy resources and easy to transfer or deliver to the end user. The grid connected solar hydrogen energy system (GCSHES) have the capability of overcoming the problems that óccur on the grid connected power system (GCPS) when there is a black out of grid electricity. Moreover, stand alone power system (SAPS) requires batteries and larger hydrogen tank capacity is required for higher energy genèration. An experimental GCSHES has been setup and tested. The GCSHES consists of subsystems photovoltaic (PV) array with 40 PV module type multicrystalin with its capacity of 5000 Wp, inverter capacity of 6000 W, electrolyzer capacity of 19 scf/h, hydrogen tank capacity of 1500 liter and fuelcell of 500 W. The characteristics equation and maximuln power output of PV was presented The monthly efficiency and performance of PV array is 12.7% and 26% , while the efficiency and performance of inverter is 95.1% and 98%, respectively. The efficiency of electrolyzer subsystem and fuel cell is 51% and 25%, respectively. The techno economical analysis indictated that the pay back period of this system is 18 years.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7609
10.31315/e.v10i1.7609
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 1-7
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 1-7
2460-8203
1410-394X
10.31315/e.v10i1
Copyright (c) 2022 Tjukup Marnoto
oai:ojs.jurnal.upnyk.ac.id:article/6310
2022-11-07T10:13:06Z
eksergi:ART
driver
Mathematical Model of Water Absorption in Arrowroot Starch-Chitosan Based Bioplastic
Yusuf, Yusmardhany
Irfandy, Fauzan
Istiani, Alit
Expansion of the size of the weight of bioplastics often occurs in daily use. This phenomenon happens because the material from bioplastics can absorb significant amounts of water. This process can lead to accumulation of swelling degree. Therefore, a mathematical model is needed to quantify this mechanism to predict the dynamics of changes in the weight of bioplastics with respet to time while contact with water to help practitioners during application design for the use of bioplastics. This study aims to build a mathematical model derived from the mass sense validated by experimental data through curve fitting. The experiment was conducted by observing the rate of change in the mass of bioplastic made from starch and chitosan by measuring the change in mass concerning time immersed in water under atmospheric conditions. The immersion time was varied between 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40,50, and 60 minutes. As a result, it can be concluded that starch-chitosan-based biofilms can absorb water up to ±10.9174 gr-water/gr-bioplastic, and also this phenomenon can be quantified by a mathematical equation that derived from mass balance with an average percent error of 1.13% and R-squared coefficient of 0.9981.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-04-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6310
10.31315/e.v19i1.6310
Eksergi; Vol 19, No 1 (2022); 35-39
Eksergi; Vol 19, No 1 (2022); 35-39
2460-8203
1410-394X
10.31315/e.v19i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6310/pdf
Copyright (c) 2022 Yusmardhany Yusuf
oai:ojs.jurnal.upnyk.ac.id:article/1610
2016-06-16T13:01:37Z
eksergi:ART
driver
The Effect of Ratio of Formaldehyde/Urea (F/U) using Catalyst of NaOH and NH4OH against Production of Urea-Formaldehyde Resin in Laboratory-Scale
Syaichurrozi, Iqbal
This study was conducted to investigate the ratio of formaldehyde/urea (F/U) and catalysts against the formation of urea-formaldehyde resin. The F/U was varied in 1.5, 2, 2.5, 3. The catalysts used were NaOH and NH4OH. The results showed that density of urea-formaldehyde resin at F/U of 1.5, 2, 2.5, 3 was 1360, 1370, 1360, 1330 kg/m3 in using catalyst of NaOH and1370, 1370, 1350, 1350 kg/m3 in using catalyst of NH4OH. Meanwhile, the absolute viscosity of urea-formaldehyde resin at F/U of 1.5, 2, 2.5, 3 was 0.007347672; 0.007723512; 0.007347672; 0.006873174kg/m.s in using catalyst of NaOH dan 0.00879; 0.00827; 0.00813; 0.00643 kg/m.s in using catalyst of menggunakan NH4OH. Resin formed (%)at F/U of 1.5, 2, 2.5, 3 was 25.92; 30.19; 28.85; 25 % in using catayst of NH4OH dan 10.71; 11.6; 9.45; 14.28 % in using catalyst of NaOH.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2016-06-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1610
10.31315/e.v13i1.1610
Eksergi; Vol 13, No 1 (2016); 21-28
Eksergi; Vol 13, No 1 (2016); 21-28
2460-8203
1410-394X
10.31315/e.v13i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1610/pdf_14
oai:ojs.jurnal.upnyk.ac.id:article/7893
2022-11-18T06:48:30Z
eksergi:ART
driver
Effect of Tandem Flocculation Agent System on Lime Mud NPE (Non Process Element)
Effect of Tandem Flocculation Agent System on Lime Mud NPE (Non Process Element)
Shaputra, Ahmad Wahyu
Apriani, Rachmawati
Flokulasi; Lime Mud; Non Process Element; PDADMAC; Sistem Kaustik
Non Process Element (NPE) is an impurity substance that is not expected to be present in the caustic system because it can cause disruption to the process and affect the product quality. One way to minimize NPE input is through the process of clarifying raw green liquor into clean green liquor using the coagulation-flocculation method with PDADMAC and A-PAM chemicals. The aim of this study is to determine the effect of tandem flocculation agent system on lime mud NPE taking into account the quality standards of several Non Process Element (NPE) compounds in lime mud, as follows : P2O5 <1%, SiO2 < 0.5%, MgO < 0.75%, Fe2O3 < 0.3%, Mn2O3, and Al2O3 < 0.5%. The clean green liquor production uses variations in PDADMAC doses (0, 3, and 5 ppm), while the A-PAM dose is fixed at 7 ppm for each variation. The results show that the optimal dose ratio of PDADMAC: A-PAM from a technical point of view is the second variation ( PDADMAC 3 ppm: A-PAM 7 ppm), where the P₂O₅ value : 0.7159%, SiO2 : 1.4856%, MgO : 0.2234%, Fe2O3 : 0.2568%, Mn2O3 : 0.0055% , and Al2O3 : 0.5988%. But, the SiO2 and Al2O3 compounds at this dose ratio still exceed the lime mud quality standard. However, the dose ratio of PDADMAC 3 ppm : A-PAM 7 ppm showed more significant result than the other ratios.
Non Process Element (NPE) is an impurity substance that is not expected to be present in the caustic system because it can cause disruption to the process and affect the product quality. One way to minimize NPE input is through the process of clarifying raw green liquor into clean green liquor using the coagulation-flocculation method with PDADMAC and A-PAM chemicals. The aim of this study is to determine the effect of tandem flocculation agent system on lime mud NPE taking into account the quality standards of several Non Process Element (NPE) compounds in lime mud, as follows : P2O5 <1%, SiO2 < 0.5%, MgO < 0.75%, Fe2O3 < 0.3%, Mn2O3, and Al2O3 < 0.5%. The clean green liquor production uses variations in PDADMAC doses (0, 3, and 5 ppm), while the A-PAM dose is fixed at 7 ppm for each variation. The results show that the optimal dose ratio of PDADMAC: A-PAM from a technical point of view is the second variation ( PDADMAC 3 ppm: A-PAM 7 ppm), where the P₂O₅ value : 0.7159%, SiO2 : 1.4856%, MgO : 0.2234%, Fe2O3 : 0.2568%, Mn2O3 : 0.0055% , and Al2O3 : 0.5988%. But, the SiO2 and Al2O3 compounds at this dose ratio still exceed the lime mud quality standard. However, the dose ratio of PDADMAC 3 ppm : A-PAM 7 ppm showed more significant result than the other ratios.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-11-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7893
10.31315/e.v19i3.7893
Eksergi; Vol 19, No 3 (2022); 110-116
Eksergi; Vol 19, No 3 (2022); 110-116
2460-8203
1410-394X
10.31315/e.v19i3
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7893/pdf
Copyright (c) 2022 Ahmad Wahyu Shaputra, Rachmawati Apriani
oai:ojs.jurnal.upnyk.ac.id:article/3714
2022-11-07T10:29:53Z
eksergi:ART
driver
The Growth Mechanisms of Atomic Layer Deposition: An Overview
Riyanto, Edy
Martides, Erie
Junianto, Endro
Prawara, Budi
atomic layer deposition; growth mechanism; thin film
In this review, the discussion emphasized on the growth mechanisms of atomic layer deposition which consists of a theoretical model and experimentally growth as well as the measurement testing as evidences. The deposition process description with some testing evidences can be used to facilitate in the effort to understand the basic concept of ALD growth mechanisms. Some metal oxides like Al2O3, HfO2, and TiO2 with these employed precursors are typically used for the detailed illustration during the reaction steps. Although the surface chemistry of ALD process has been well understood, systematic description which combine a theoretical and experimentally growth mechanism is still missing. This paper aims to provide a better understanding of ALD growth mechanisms and surface chemistry which eventually able to contribute on the thin film growth processing.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2020-12-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3714
10.31315/e.v17i2.3714
Eksergi; Vol 17, No 2 (2020); 56-61
Eksergi; Vol 17, No 2 (2020); 56-61
2460-8203
1410-394X
10.31315/e.v17i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3714/pdf
Copyright (c) 2020 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/10734
2024-02-19T03:48:35Z
eksergi:ART
driver
Effect of Chitosan-TiO2 Membrane Performance for the Degradation of Batik Waste with a Photocatalytic Hybrid System
Nyamiati, Retno Dwi
Timotius, Daniel
Sri Rahmawati, Septi Sri
Carissavila, Calista
Amalia, Noor
Membrane;Photocatalytic;Chitosan;TiO2; Batik Waste
The treatment of industrial wastewater has gained significant attention in recent years due to its detrimental impact on the environment and public health. This study aims to explore the effectiveness of a photocatalytic hybrid system using a Chitosan-TiO2 membrane for the degradation of batik waste. The performance of the membrane was investigated through a series of experiments, evaluating its ability to remove organic pollutants and enhance the overall treatment efficiency. The morphology, as seen through SEM images, shows a rough surface that enhances photocatalytic efficiency by providing a larger surface area for reactions. The uniform distribution of TiO2 particles within the chitosan matrix is crucial for stable and efficient pollutant degradation during photocatalysis. Furthermore, Chitosan-TiO2 membranes offer a promising solution for batik wastewater treatment. They combine the benefits of chitosan's permeability and organic substance capture with TiO2's photocatalytic capabilities. This integration allows for efficient, one-step hybrid photocatalytic filtration, reducing the use of harmful chemicals and producing environmentally friendlier byproducts. Finally, AAS analysis demonstrated that the addition of TiO2 improved heavy metal degradation in batik waste, with optimal performance observed up to a 89.78% rejection rate, beyond which TiO2 agglomeration occurred.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
Research and Community Service (LPPM) Universitas Pembangunan Nasional “Veteran” Yogyakarta
2024-01-24
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10734
10.31315/e.v21i1.10734
Eksergi; Vol 21, No 1 (2024); 44-47
Eksergi; Vol 21, No 1 (2024); 44-47
2460-8203
1410-394X
10.31315/e.v21i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10734/pdf
Copyright (c) 2024 Retno Dwi Nyamiati, Daniel Timotius, Septi Sri Sri Rahmawati, Calista Carissavila, Noor Amalia
oai:ojs.jurnal.upnyk.ac.id:article/324
2014-12-07T17:16:00Z
eksergi:ART
driver
Pengaruh pH dan Rasio COD:N Terhadap Produksi Biogas dengan Bahan Baku Limbah Industri Alkohol (Vinasse)
Budiyono, Budiyono
biogas; COD:N; vinasse; urea; NH4HCO3
Industrial waste ethanol, which vinasse is one potential source to be processed into biogas. This study was conducted to assess the potential of vinasse waste and comparison nutrients needed to obtain biogas with optimum results. Experiments conducted in the digester volume 5L, operated at room temperature and neutral pH by varying the ratio of COD: N: P 800:7, 900:7, 1000:7 on vinasse mixture, rumen, urea and vinasse mixture , rumen, and NH4 HCO3 within 30 days. Respons which taken from this research are influence of pH, ratio of COD:N and nutrition to biogas production. The optimum condition of pH in producing biogas is at 7. Production of biogas produced at the optimum ratio of COD: N: P 800:7 is equal to 280 ml (0,96 ml biogas/mg TS COD) in a mixture of vinasse, rumen, urea and 3839 ml (13,73 ml biogas/mg TS COD) in a mixture of vinasse, rumen, NH4 HCO3 due to the comparison easier bacteria decompose organic compounds. While vinasse mixture, rumen, and NH4 HCO3 produces more biogas than vinasse mixture, rumen, urea may be due NH4 HCO3 to maintain the pH range so that the bacteria can survive.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-10-29
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/324
10.31315/e.v11i1.324
Eksergi; Vol 11, No 1; 1-6
Eksergi; Vol 11, No 1; 1-6
2460-8203
1410-394X
10.31315/e.v11i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/324/276
oai:ojs.jurnal.upnyk.ac.id:article/7552
2022-08-15T04:33:34Z
eksergi:ART
driver
LAJU PERTUMBUHAN MIKROBIA PADA PENGOLAHAN LIMBAH CAIR TEMPE MENGGUNAKAN SISTEM BIOFILM
Sulistyawati, Endang
gunarto, Gunarto
Límbah cair industri tempe bersifat biodegradable, sehingga dapat diuraí secara biologi. Pengoløhanyang dÍcobakan adalah sistem biofilm. Percobaan dilakukan dengan mengembangbíakkan Bakteri Bachillus Sphaericus menggunakan nutrisi MRS Broth dalam aquades dan media biofìlm batu apung yang dimasukkan dalam limbah. Laju pertumbuhan bakteri diamati pada variasi suhu 29C, 40C, 50C dan 60C pada fase pertumbuhan cepat. Hasil analísís data dengan pendekatan bahwa reaksi yang terjadimengikuti reaksi katalitik orde satu diperoleh persamaan laju pertumbuhan mikroba sebagai fungsi suhu sebagai r= 1,75 x 10^8 e^(-13.2/RT)xS.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7552
10.31315/e.v9i1.7552
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 42-46
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 42-46
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7552/pdf
Copyright (c) 2022 Endang Sulistyawati, Gunarto gunarto
oai:ojs.jurnal.upnyk.ac.id:article/2227
2022-03-29T08:18:20Z
eksergi:ART
driver
Optimization of the Citronellal Synthesis Process from Cymbopogon winterianus Assisted by Microwave using Methanol and N-Hexan Solvent
Harianingsih, Harianingsih
Kata kunci : ekstraksi, gelombang mikro, sitronelal
ABSTRAK: Proses ekstraksi minyak atsiri menjadi penting diperhatikan untuk menghasilkan rendemen yang lebih tinggi. Ekstraksi minyak sereh wangi yang biasa dilakukan adalah dengan maerasi, destilasi fraksinasi bertingkat, soxhlet dan proses konvensional lainnya. Hasil ekstrak dari minyak sereh wangi dengan komponen paling tinggi adalah sitronelal yaitu 35%. Sitronelal bermanfaat untuk pembuatan parfum, aerosol, detergen dan masih banyak yang lainnya. Pada penelitian ini dilakukan sintesis sitronelal dari sereh wangi menggunakan ekstraksi dengan bantuan gelombang mikro. Alat ekstraktor dibuat dengan memodifikasi alat ekstraktor berupa microwave yang diberi labu alas bulat sebagai media untuk bahan sereh wangi dan pelarut metanol dan n-heksan. Variabel yang berpengaruh antara lain waktu dan volume pelarut. Waktu yang digunakan 5, 10, 15, 20, 25 menit, daya sebesar 10, 20, 30, 50 W dan variasi volume pelarut metanol sebanyak 50, 100, 150 dan 200 ml. Hasil penelitian diperoleh dengan waktu yang singkat dengan variabel beda daya diperoleh dalam waktu 5 menit diperoleh ekstrak sitronelal sebesar 30,1%. Pada volume yang rendah 50 ml diperoleh ekstrak sitronelal sebanyak 32,5%. Hasil perolehan sintesis sitronelal menggunakan bantuan gelombang mikro dan pelarut etanol ini lebih kecil dibandingkan ekstraksi evaporasi yang dapat mengekstrak sitronelal hingga mencapai 36%.Kata Kunci: ekstraksi; gelombang mikro; sitronelal ABSTRACT: The process of extracting essential oils is important to note in order to produce a higher yield. The extraction of citronella oil is commonly done with maerasi, stratified fractionation distillation, soxhlet and other conventional processes. The extract from citronella oil with the highest component was citronellal which was 35%. Sitronelal is useful for making perfumes, aerosols, detergents and many others. In this study, citronellal synthesis of citronella was done using microwave extraction. The extractor is made by modifying the extractor in the form of a microwave which is given a round bottom flask as a medium for the ingredients of citronella with metanol and n-hexan solvent. The variables that influence include time and volume of solvent. Time used 5, 10, 15, 20, 25 min, power 10, 20, 30, 50 W and variation of methanol solvent volume of 50, 100, 150 and 200 ml. The results obtained with a short time with variable power difference obtained within 5 minutes obtained 30 cm of sitronelal extract. At a low volume of 50 ml citronellal extract obtained as much as 32.5%. The result of citronellal synthesis using microwaves and ethanol solvent is smaller than evaporative extraction which can extract citronellal up to 36%.Keywords: extraction; microwave; citronellal
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2018-07-04
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2227
10.31315/e.v15i1.2227
Eksergi; Vol 15, No 1 (2018): Vol 15, No 1 (2018); 1-4
Eksergi; Vol 15, No 1 (2018): Vol 15, No 1 (2018); 1-4
2460-8203
1410-394X
10.31315/e.v15i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2227/pdf
Copyright (c) 2018 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/9096
2023-09-13T07:41:24Z
eksergi:ART
driver
Current Research on The Development of Carbon Separation and Capture with Polymeric Membrane: A State of The Art Review
Penelitian Terkini tentang Pengembangan Pemisahan dan Penangkapan Karbon dengan Membran Berbahan Dasar Polimer: Tinjauan Kebaruan
Nyamiati, Retno Dwi
Nurkhamidah, Siti
Nanda, Dodi Eko
Timotius, Daniel
Mahreni, Mahreni
Handayani, Dian Purnami
Amalia, Dwi
Krisnabudhi, Alfathony
Membrane, Carbon Capture, Polymeric
Membran; Penangkapan Karbon; Polimer
Separation and capture of carbon dioxide (CO2) has become a very hot topic of discussion recently. The increasing amount of carbon dioxide in the environment makes environmental pollution very significant. Membrane technology is one of the alternative carbon separation processes that are increasingly in demand, because membrane technology provides excellent advantages in terms of energy requirements used, capital investment invested, and ease of operating equipment compared to other processes. Many membrane constituent materials can be used to be the basic material for making membranes, including polymeric materials. This review discusses the various polymeric materials that can be used as basic materials for gas membranes in terms of plasticization, constituent components, flexibility, and mechanical strength. It also provides an understanding of alternatives to improve the properties of polymer-based membranes.
Kajian dan penelitian mengenai pemisahan dan penangkapan karbon dioksida (CO2) semakin meningkat. Peningkatan jumlah karbon dioksida dilingkungan membuat pencemaran lingkungan yang sangat berarti. Teknologi membran menjadi salah satu alternatif proses pemisahan karbon yang semakin diminati, dikarenakan teknologi membran memberikan keuntungan yang sangat baik dalam hal kebutuhan energi yang digunakan, investasi modal yang ditanam, serta kemudahan dalam mengoperasikan peralatan dibandingkan dengan proses yang lain. Banyak bahan penyusun membran yang dapat digunakan untuk menjadi bahan dasar pembuatan membran, diantaraya adalah bahan polimer. Tinjauan ini membahas menganai macam-macam bahan polimer yang dapat digunakan sebagai bahan dasar penyusun membran gas yang ditinjau dari sisi plastisisasi, komponen penyusun, fleksibilitas, dan kekuatan mekanik. Tinjauan ini juga memberikan pemahaman alternatif untuk menaikkan properti dari membran yang berbahan dasar polimer.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-07-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9096
10.31315/e.v20i2.9096
Eksergi; Vol 20, No 2 (2023); 58-63
Eksergi; Vol 20, No 2 (2023); 58-63
2460-8203
1410-394X
10.31315/e.v20i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9096/pdf
Copyright (c) 2023 Retno Dwi Nyamiati, Siti Nurkhamidah, Daniel Timotius, Mahreni Mahreni, Dian Purnami Handayani, Dwi Amalia, Dodi Eko Nanda, Alfathony Krisnabudhi
oai:ojs.jurnal.upnyk.ac.id:article/5400
2023-01-15T05:33:08Z
eksergi:ART
driver
The effect of solvent and temperature on yield and pectin characteristics from kepok banana peels
PENGARUH JENIS ASAM DAN SUHU EKSTRAKSI TERHADAP KARAKTERISTIK PEKTIN DARI KULIT PISANG KEPOK
ristianingsih, yuli
Lestari, Indriana
Nandari, Wibiana Wulan
kulit pisang kepok; pektin; HCl; asam asetat
Pectin is structurally and functionally the most complex polysaccharide in plant cell walls. Pectin is widely used as an adhesive and emulsifier in the food, pharmaceutical industry and also as an adsorbent in waste water treatment. This research used banana peels as a raw material. The purpose of this study was to study the effect of temperature and solvent (acetic acid and hydrochloric acid) on the characteristics of pectin (ash content, methoxyl and galacturonic content). This research was carried out in a stirred tank reactor for 90 minutes with various types of solvents (hydrochloric acid and acetic acid) and extraction temperatures (60, 70, 80 and 90) 0C. Based on the research, it was found that the optimum pectin yield with 0.25 N HCl at a temperature of 800C was 24.93%. The characteristics of pectin which include galacturonic acid, methoxyl content, ash content and equivalent weight at an extraction temperature of 800C with a concentration of 0.25 N HCl were 79,56%; 2.65; 6,72% and 3846
Pektin merupakan senyawa polisakarida yang melapisi dinding sel tanaman. Pektin banyak dimanfaatkan sebagai zat perekat dan pengental pada industri makanan, farmasi dan juga sebagai adsorben pada pengolahan limbah. Penelitian ini menggunakan kulit pisang kepok sebagai bahan baku. Tujuan penelitian ini adalah mempelajari pengaruh suhu dan jenis pelarut (asam asetat dan HCl) terhadap karakteristik pektin (kadar abu. Kadar metoksil dan galakturonat). Penelitian dilakukan dalam sebuah reaktor berpengaduk selama 90 menit dengan variasi jenis pelarut (HCl dan asam asetat) dan suhu ekstraksi (60, 70, 80 dan 90) 0C. berdasarkan penelitian diperoleh rendemen maksimal dihasilkan pada pektin dengan pelarut HCl 0,25 N pada suhu 800C sebesar 24,93%. Karakteristik pektin yang meliputi kadar galakturonat, kadar metoksil, kadar abu dan berat ekivalen pada suhu ekstraksi 800C dengan konsentrasi HCl 0,25 N masing-masing adalah 79,56%; 2,65; 6,72% dan 3846.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2021-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5400
10.31315/e.v18i2.5400
Eksergi; Vol 18, No 2 (2021); 37-42
Eksergi; Vol 18, No 2 (2021); 37-42
2460-8203
1410-394X
10.31315/e.v18i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5400/pdf
Copyright (c) 2021 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/342
2022-08-15T04:32:21Z
eksergi:ART
driver
Standards Practical Tools in Dealing with Climate Change
Dulbert T, Biatna
Climate Change; Environmental; Energy
Drastic climate change is becoming an increasingly serious threat to the survival of living beings on this planet. Various effects have been caused by climate change such as rising temperatures, floods, rising sea level, the uncertain season and other radical changes. Other than forest destruction, as well as industry and transportation use fossil fuels contributed in exacerbating climate change. Indonesia, have adopted identical to the four Green House Gases (GHG) into the SNI via reprints. As a developing country and the condition of Indonesia's forests and peatland in the tropics, it is more easy going deforestation and degradation. Indonesia is concentrated to develop standards in deforestation field based decreased functions of tropical rain forests as carbon sinks are big enough, not to mention the peatland carbon stocks that have high potential around 36 Gton CO2 from 22 million hectares only. The development of ISO standards in measurements and calculations the Greenhouse Effect, Product Recycling, Promoting Environmental good, Energy Efficiency, Consumer Aware Environmental, very useful and contribute to tackle climate change significantly with the implementation of international standards. The most important thing now is how far the destruction of nature caused by human habits that are not environmentally friendly. Increasing understanding about the scale of change needed to tackle global warming, government, business and civil society should be able to perform the necessary steps and face the need to work in partnership to address such a change. In the long term the benefits of addressing climate change will far outweigh the impact costs . But in the short term, governments, business, and civil society will be more willing to bear those costs if they know their counterparts and competitors use standards, as a practical tool in dealing with climate change.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-11-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/342
10.31315/e.v10i2.342
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 1-4
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 1-4
2460-8203
1410-394X
10.31315/e.v10i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/342/292
oai:ojs.jurnal.upnyk.ac.id:article/7582
2022-08-15T04:33:16Z
eksergi:ART
driver
Pemecahan Emulsi Simulasi dengan Variasi Salinitas Air Menggunakan Gelombang Mikro
Nuri, Wasir
Pemecahan Emulsi Simulasi dengan Variasi Salinitas Air Menggunakan Gelombang Mikro
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/34-39
10.31315/e.v9i1.7582
Eksergi; Vol 9, No 1 (2009): Versi Cetak
Eksergi; Vol 9, No 1 (2009): Versi Cetak
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/34-39/4550
Copyright (c) 2022 Wasir Nuri
oai:ojs.jurnal.upnyk.ac.id:article/2805
2022-11-07T10:32:57Z
eksergi:ART
driver
Growth of CeO2-doped ZnO Nanorods on Glass Substrates using Hydrothermal Method
Penumbuhan ZnO Rods Terdoping CeO2 Pada Substrat Kaca Menggunakan Metode Hidrotermal
Mayasari, Rina Dewi
H, Yuliani
Y, Deni
M, Masmui
J, Raharjo
R, Nuryadi
CeO2; ZnO rods; kaca; hidrotermal; hexagonal flower-like
Pure and cerium oxide (CeO2)-doped zinc oxide (ZnO) rods have been successfully grown on glass substrates using hydrothermal method. Growth of ZnO nanorods has two main processes, i.e. deposition of seed layer and growth of rods. The concentration ratios of Ce/ZnO are of about 1%, 5%, and 10%. The effect of CeO2 dopan on the structural and morphology of ZnO nanorods were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersion X-ray (EDX), and Fourier transform infrared (FTIR). The XRD spektrum on pure and CeO2-doped ZnO rods have hexagonal wurtzite structure with three highest peaks on the lattice of (100), (002), and (101), and face-centered cubic CeO2 phase on the lattice of (111) and (200). Analysis result of SEM confirmed that pure and CeO2-doped ZnO rods formed agglomeration of hexagonal flower-like rods. The addition of CeO2 shifted ZnO peaks of FTIR spectrum from 729 cm-1 to ~780 cm-1 .
Seng oksida (ZnO) rods murni dan terdoping serium oksida (CeO2) telah ditumbuhkan di atas substrat kaca dengan menggunakan metode hidrotermal. Penumbuhan ZnO rods memiliki dua tahapan proses utama, yaitu pelapisan seed (pembenihan) dan penumbuhan rods. Rasio konsentrasi Ce/ZnO adalah sebesar 1%, 5%, dan 10%. Efek dopan CeO2 pada struktur dan morfologi ZnO rods dianalisa dengan X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersion X-ray (EDX), dan Fourier transform infrared (FTIR). Spektrum XRD dari ZnO rods murni dan terdoping CeO2 memiliki fasa hexagonal wurtzite ZnO dengan tiga puncak tertinggi pada bidang kisi (100), (002), (101), serta fasa face-centered cubic CeO2 pada bidang kisi (111) dan (200). Hasil analisis SEM mengonfirmasi bahwa bentuk ZnO murni dan terdoping CeO2 adalah gumpalan hexagonal flower-like rods. Penambahan CeO2 telah menggeser puncak spektrum FTIR ZnO murni dari 729 cm-1 menjadi ~780 cm-1.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2019-11-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2805
10.31315/e.v16i2.2805
Eksergi; Vol 16, No 2 (2019); 31-34
Eksergi; Vol 16, No 2 (2019); 31-34
2460-8203
1410-394X
10.31315/e.v16i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2805/pdf
Copyright (c) 2019 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/10733
2024-02-19T03:56:25Z
eksergi:ART
driver
ec_fundedresources
Pengaruh Pelarut, Rasio Pelarut, dan Waktu Ekstraksi Terhadap Astaxanthin dari Haematococcus sp. dengan Bantuan Ultrasound Assisted Extraction
Putri, Wilda Ayu
Al Maqsidi, Muhammad Ariq
Achmad, Zubaidi
Hadi, Faizah
Nur, Muhamad Maulana Azimatun
Antioksidan; Astaxanthin; Ekstraksi; Ultrasound Assisted Extraction; Spektrofotometri UV-Vis.
Indonesia merupakan negara kepulauan dengan keanekaragaman hayati sehingga memilliki potensi bagi perairan Indonesia untuk mikroalga dapat tumbuh dan berkembang. Mikroalga Haematococcus sp. dikenal mengandung senyawa karotenoid, khususnya senyawa astaxanthin. Astaxanthin berkhasiat sebagai antioksidan yang dapat dimanfaatkan sebagai suplemen kesehatan. Penelitian ini bertujuan untuk mengetahui pengaruh jenis pelarut, volume pelarut, dan lama waktu ekstraksi terhadap kadar astaxanthin. Ekstraksi dilakukan dengan metode Ultrasound Assisted Extraction (UAE). Penelitian ini menggunakan metode percobaan dengan Rancangan Acak Lengkap (RAL) factorial dengan tiga variabel bebas yaitu jenis pelarut, volume pelarut dan waktu ekstraksi pada proses ekstraksi. Pada penelitian ini dilakukan analisis kadar astaxanthin dalam Haematococcus sp.yang diperoleh dari hasil kultivasi sendiri, kemudian dilakukan pengukuran kadar astaxanthin menggunakan spektrofotometri UV-Vis pada panjang gelombang 478 nm. Hasil pengukuran menunjukkan kadar astaxanthin tertinggi pada variasi pelarut aseton dengan volume 10 ml lama waktu 25 menit sebesar 0,0677%.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-11-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10733
10.31315/e.v20i3.10733
Eksergi; Vol 20, No 3 (2023); 156-161
Eksergi; Vol 20, No 3 (2023); 156-161
2460-8203
1410-394X
10.31315/e.v201i3
ind
info:eu-repo/grantAgreement/EC/FP7/000000
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10733/pdf
info:eu-repo/semantics/openAccess
Copyright (c) 2023 Wilda Ayu Putri
oai:ojs.jurnal.upnyk.ac.id:article/1354
2015-12-14T21:43:02Z
eksergi:ART
driver
Biosurfactant
Biosurfaktan
Reningtyas, Renung
Mahreni, M
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.
Surfaktan adalah suatu senyawa kimia yang bersifat ampipilik dimana sifat hidropilik dan hidropobik ada dalam satu molekul surfaktan. Dalam jumlah sedikit dapat menurunkan tegangan permukaan suatu fluida. Surfaktan dibutuhkan oleh industri kosmetik, makanan, tekstil, industri minyak bumi dan farmasi. Permasalahan yang ditumbulkan oleh aplikasi surfaktan adalah pencemaran lingkungan. Karena sampai pada saat ini masih menggunakan surfaktan berbahan dasar petroleum non biodegradable. Biosurfaktan adalah surfaktan biodegradable yang dapat diproduksi oleh sel mikoorganisme (bakteri/fungi) maupun dari bahan alam. Biosurfaktan dari mikoorganisme telah diketahui memiliki senyawa Rhamnolipid dan Lipopeptida. Sebagai contoh adalah Surfactin dan Dactomicin, yang merupakan biosurfaktan yang dihasilkan oleh mikroorganisme dengan aktivitas antibiotik. Biosurfaktan yang terbuat dari bahan alam contohnya adalah MES (Metil Ester Sulfonat), yang terbuat dari minyak sawit. Selain MES, ester dari karbohidrat merupakan surfaktan yang dihasilkan dari esterifikasi karbohidrat dan asam karboksilat. Bottle neck (hambatan) produksi surfaktan dari mikroorganisme adalah prosesnya lambat, biaya pemurnian tinggi dan harga produk mahal. Biosurfaktan dari bahan alam mendapat perhatian dari kalangan peneliti dan industri untuk diproduksi skala besar besaran karena prosesnya cepat, bahan baku tersedia melimpah dan murah. Tulisan ini merupakan ringkasan yang dapat digunakan sebagai referensi untuk mengembangkan surfaktan biodegradable yang diharapkan dapat menjadi arah penelitian dan pengembangan produksi biosurfaktan skala industri.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2015-12-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1354
10.31315/e.v12i2.1354
Eksergi; Vol 12, No 2 (2015); 12-22
Eksergi; Vol 12, No 2 (2015); 12-22
2460-8203
1410-394X
10.31315/e.v12i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1354/pdf_mahreni
oai:ojs.jurnal.upnyk.ac.id:article/7614
2022-08-15T04:32:42Z
eksergi:ART
driver
KOPOLIMERISASI CANGKOK METIL METAKRILAT PADA PATI TAPIOKA MENGGUNAKAN INISIATOR CERIC AMMONIUM NITRAT
Murni, Sri Wahyu
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%.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-15
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7614
10.31315/e.v10i1.7614
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 34-39
Eksergi; Vol 10, No 1 (2010): Versi Cetak; 34-39
2460-8203
1410-394X
10.31315/e.v10i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7614/4596
Copyright (c) 2022 Sri Wahyu Murni
oai:ojs.jurnal.upnyk.ac.id:article/3300
2022-11-07T10:30:19Z
eksergi:ART
driver
Steam Distillation of Essential Oil from Lemongrass (Cymbopogon citratus) using Microwave Pretreatment
Murni, Ir., MT, Sri Wahyu
Setyoningrum, Tutik Muji
Haryono, Gogot
serai dapur, minyak atsiri, hidrodestilasi, microwave, pretreatment
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.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2020-04-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3300
10.31315/e.v17i1.3300
Eksergi; Vol 17, No 1 (2020); 15-19
Eksergi; Vol 17, No 1 (2020); 15-19
2460-8203
1410-394X
10.31315/e.v17i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3300/pdf
Copyright (c) 2020 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/10669
2024-02-19T03:48:35Z
eksergi:ART
driver
Adsorpsi Zat Warna Remazol Brilliant Blue R Pada Limbah Industri Batik Menggunakan Adsorben dari Mahkota Buah Nanas
Siswanti, Siswanti
Oktafiana, Afifah Hasna
Putri, Yobellya
mahkota buah nanas; karbon aktif; limbah batik; Remazol Brilliant Blue R; adsorpsi
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.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-12-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10669
10.31315/e.v21i1.10669
Eksergi; Vol 21, No 1 (2024); 9-16
Eksergi; Vol 21, No 1 (2024); 9-16
2460-8203
1410-394X
10.31315/e.v21i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/10669/pdf
Copyright (c) 2023 Siswanti Siswanti, Afifah Hasna Oktafiana, Yobellya Putri
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
Sintesa Kalsium Karbonat Presipitat
Ariono, Carnila D
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
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-09
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7545
10.31315/e.v9i1.7545
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 11-15
Eksergi; Vol 9, No 1 (2008): Versi Cetak; 11-15
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/7545/pdf
Copyright (c) 2022 Carnila D Ariono
oai:ojs.jurnal.upnyk.ac.id:article/2139
2018-01-01T18:47:11Z
eksergi:ART
driver
Pengaruh Variasi Komposisi Pada Campuran Limbah Cair Aren dan Kotoran Sapi Terhadap Produksi Biogas
Ramdiana, Ramdiana
limbah cair aren; kotoran sapi; biogas.
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%.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2017-12-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2139
10.31315/e.v14i2.2139
Eksergi; Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 12-17
Eksergi; Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017; 12-17
2460-8203
1410-394X
10.31315/e.v14i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/2139/pdf_26
oai:ojs.jurnal.upnyk.ac.id:article/8990
2023-04-10T03:14:43Z
eksergi:ART
driver
Color Degradation of Napthol Jeans with TiO2-SiO2 Photocatalyst from Karangwuni Beach Sand, Kulon Progo
Amelia, Shinta
Shitopyta, Lukhi Mulia
W, Mila Utami
Sriyana, Ida
Fotokatalis ; Naphtol Jeans ; Pasir Karangwuni ; TiO2 ; SiO2
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.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-03-02
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8990
10.31315/e.v20i1.8990
Eksergi; Vol 20, No 1 (2023); 15-20
Eksergi; Vol 20, No 1 (2023); 15-20
2460-8203
1410-394X
10.31315/e.v20i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/8990/pdf
Copyright (c) 2023 shinta amelia
oai:ojs.jurnal.upnyk.ac.id:article/4572
2022-11-07T10:15:39Z
eksergi:ART
driver
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
agriculture; binder; biomass waste; briquette; charcoal; pyrolysis.
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.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2021-04-27
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4572
10.31315/e.v0i0.4572
Eksergi; Vol 18, No 1 (2021); 13-17
Eksergi; Vol 18, No 1 (2021); 13-17
2460-8203
1410-394X
10.31315/e.v0i0
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4572/pdf
Copyright (c) 2021 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/337
2022-08-15T04:32:21Z
eksergi:ART
driver
Pengaruh Kadar Garam Dapur Terhadap Suhu Makanan yang Dimasak dengan Microwave
Nuri,MT, Wasir
salt; microwave; temperature.
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.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2014-11-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/337
10.31315/e.v10i2.337
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 32-35
Eksergi; Vol 10, No 2 (2010): Versi Cetak; 32-35
2460-8203
1410-394X
10.31315/e.v10i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/337/287
oai:ojs.jurnal.upnyk.ac.id:article/7577
2022-08-15T04:33:16Z
eksergi:ART
driver
Koefisien Perpindahan Massa pada Ekstraksi Protein dari Biji Kecipir dengan Pelarut NaOH
Pawignyo, Harso
Siswanti, Siswanti
Koefisien Perpindahan Massa pada Ekstraksi Protein dari Biji Kecipir dengan Pelarut NaOH.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-08-11
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6-10
10.31315/e.v9i1.7577
Eksergi; Vol 9, No 1 (2009): Versi Cetak
Eksergi; Vol 9, No 1 (2009): Versi Cetak
2460-8203
1410-394X
10.31315/e.v9i1
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6-10/pdf
Copyright (c) 2022 Harso Pawignyo, Siswanti Siswanti
oai:ojs.jurnal.upnyk.ac.id:article/1969
2022-11-07T10:31:11Z
eksergi:ART
driver
Extraction of Cashew Seed Skin Oil from the Waste of Cashew Seed Skin (Anacardium occidentale) with Ultrasonic Aid
EKSTRAKSI MINYAK KULIT BIJI METE DARI LIMBAH KULIT BIJI JAMBU METE (Anacardium occidentale) DENGAN ALAT ULTRASONIC CLEANING BATH
Rengga, Wara Dyah Pita
Hartanto, Dwi -
Wibowo, Bayu Tri
Setiawan, Mohammad
cashew shell; extraction; n-hexane; ultrasonic waves; anacardic acid
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.
Limbah kulit mete dapat manfaatkan sebagai bahan baku salah satu industri cat genteng dan minyak rem. Proses ekstraksi konvensional sebagian besar kurang memberikan perpindahan massa sehingga proses ekstraksi lambat dan tidak maksimal untuk mendapatkan minyak kulit mete. Pelarut dalam jumlah yang berlebihan sering digunakan namun membuat proses menjadi mahal dan mencemari lingkungan. Solusi yang tepat dalam mengekstraksi yaitu dengan bantuan ultrasonik. Penelitian ini bertujuan untuk mendapatkan optimasi proses ekstraksi minyak kulit mete dengan mengunakan gelombang ultrasonik dengan fekuensi 42 kHz. Pengaruh yang dipelajari adalah rasio serbuk kulit mete terhadap pelarut n-heksana, dan waktu ekstraksi. Metode permukaan respon dengan rancangan Central Composite Design digunakan untuk memperoleh model matematis yang menggambarkan hubungan antara rendemen minyak kulit mete terhadap rasio dan waktu ekstraksi. Hasil penelitian menunjukkan bahwa kondisi optimum ekstraksi minyak kulit mete pada komposisi perbandingan serbuk kulit mete terhadap pelarut n-heksana sebesar 1:3,25 (g/g) selama 90 menit dengan rendemen sebesar 36,15%. Minyak kulit mete mengandung asam anakardat, kardanol, dan senyawa fenol lainnya.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.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2019-07-23
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1969
10.31315/e.v0i0.1969
Eksergi; Vol 16, No 1 (2019); 1-6
Eksergi; Vol 16, No 1 (2019); 1-6
2460-8203
1410-394X
10.31315/e.v16i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/1969/pdf
Copyright (c) 2019 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/9955
2023-07-14T03:54:14Z
eksergi:ART
driver
Study of Linear Alkylbenzena Sulfonate (LAS) Adsorption Isotherms in Detergent Wastewater Using Coffee Grounds and Coconut Dregs Biosorbents
Kajian Isoterm Adsorpsi Linear Alkilbenzena Sulfonate (LAS) dalam Limbah Cair Detergen Menggunakan Biosorben Ampas Kopi dan Ampas Kelapa
Septiani, Mimin
Darajat, Zakiyah
Yunus, Muhammad Arham
Ole, Maria Assumpta Nogo
Ilma, Zuhrotul Fikri
Adsorption;Coffee ground; Coconut Dregs; Linear Alkyl Benzena Sulfonat
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.
Salah satu upaya meminimalisir dampak pencemaran limbah detergen yaitu dengan melakukan adsorpsi menggunakan Adsorben Ampas Kopi dan Ampas Kelapa. Tujuan dari penelitian ini adalah untuk mengetahui massa optimum ampas kopi dan ampas kelapa sebagai adsorben, mengetahui perbandingan efektivitas daya serapnya dalam penurunan kadar Linear Alkyl Benzena Sulfonat, serta mengkaji model isoterm adsoprsinya. Penelitian ini dilakukan secara batch dengan variasi massa masing-masing adsorben yaitu 1 gram, 2 gram, 3 gram, 4 gram, dan 5 gram. Sampel limbah detergen dikontakkan pada adsorben selama 30 menit lalu dilakukan uji daya serap menggunakan metode uji Methylene Blue.Hasil penelitian menunjukkan bahwa penyerapan kadar LAS optimum dari adsorben ampas kopi dan ampas kelapa terjadi pada massa 2 gram dengan indeks kenaikan efisiensi penyerapan paling besar. Adsorben ampas kelapa lebih efektif dari ampas kopi karena mampu menyerap hingga 37% sedangkan ampas kopi hanya 10% dengan massa adsorben yang sama sebanyak 5 gram. Model Isoterm adsorpsi dari 2 jenis adsorben tersebut mengacu pada kesetimbangan Langmuir dengan nilai R2 untuk ampas kopi 0.8651 dan ampas kelapa 0.9868.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2023-07-03
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9955
10.31315/e.v20i2.9955
Eksergi; Vol 20, No 2 (2023); 124-130
Eksergi; Vol 20, No 2 (2023); 124-130
2460-8203
1410-394X
10.31315/e.v20i2
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/9955/pdf
Copyright (c) 2023 Mimin Septiani, Zakiyah Darajat, Muhammad Arham Yunus, Maria Assumpta Nogo Ole, Zuhrotul Fikri Ilma
oai:ojs.jurnal.upnyk.ac.id:article/5304
2022-11-07T10:13:06Z
eksergi:ART
driver
Magnetite Surface Modification with Silica and Its Application as Adsorbent of Heavy Metal Ion Nickel and Manganese
Mahmuda, Diah
magnetit; modifikasi; permukaan; silika; adsorben
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.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2022-04-05
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5304
10.31315/e.v0i0.5304
Eksergi; Vol 19, No 1 (2022); 6-9
Eksergi; Vol 19, No 1 (2022); 6-9
2460-8203
1410-394X
10.31315/e.v19i1
ind
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/5304/pdf
Copyright (c) 2022 Eksergi
oai:ojs.jurnal.upnyk.ac.id:article/3088
2022-11-07T10:32:57Z
eksergi:ART
driver
Chitosan Concentration and Cross-linker Volume Effect on The Release Kinetic of Red Ginger Oleoresin Microcapsule in Simulated Intestinal Fluid (SIF) Medium
Jayanudin, Jayanudin
Fahrurrozi, Moh.
Wirawan, Sang Kompiang
Rochmadi, Rochmadi
kinetika release, kitosan, oleoresin jahe merah, stimulated intestinal fluid
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.
Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta
2019-11-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
application/pdf
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3088
10.31315/e.v16i2.3088
Eksergi; Vol 16, No 2 (2019); 47-52
Eksergi; Vol 16, No 2 (2019); 47-52
2460-8203
1410-394X
10.31315/e.v16i2
eng
http://jurnal.upnyk.ac.id/index.php/eksergi/article/view/3088/pdf
Copyright (c) 2019 Eksergi
314368e40fa740daa6d7a94170405e2b