2026-04-04T01:58:01Z https://jurnal.upnyk.ac.id/index.php/kejuangan/oai

oai:jurnal.upnyk.ac.id:article/407 2022-09-28T23:18:26Z kejuangan:ART

Pembuatan Edible Film dari Tepung Jagung (Zea Mays L.)dan Kitosan Wahyu Murni, Sri edible film cornstarch chitosan Food packaging is important that affect it’s quality, one of the safe packaging method is to use edible film. Edible film is a thin layer that can be consumed, formed to coat the food that serves to maintain the food quality, as mass transfer barrier (eg, moisture, oxygen, light, lipids, and solute). Edible film also can be used a carrier substance additives to improve the food quality. This research aims to determine the appropriate formulation of material to produce edible film with optimal characteristics. In this casethe main materials used are corn starch and chitosan with the addition sorbitol and glycerol as plasticizer. Edible films made from cornstarch dissolved in distilled water and then heated till 85oC and chitosan dissolved with a solution of 1% acetic acid. Both mixtures were mixed and then plasticizer sorbitol and glycerol were added. After it is molded, and dried at 60°C in 7 hours; it is released from the mold, edible film is ready to use. The results shows that the optimum formulation of edible corn starch and chitosan films are edible film that formed from 7 grams cornstarch, 3 grams of chitosan, 1 ml of sorbitol and 1ml of glycerol, with physical characteristic is 21 , 45 % film solubility; 15,5597 MPa film tensile strength, and water vapor permeability is about 3,089 × 10^-8 g/m.s.kPa Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015-04-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/407 Seminar Nasional Teknik Kimia "Kejuangan"; 2015: Prosiding SNTKK 2015; B17.1-B17.9 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2015: Prosiding SNTKK 2015; B17.1-B17.9 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/407/367

oai:jurnal.upnyk.ac.id:article/518 2022-09-28T23:19:40Z kejuangan:ART

Simulasi Model Jaringan dan Fasilitas Permukaan Injeksi CO2 Sistem Terpusat pada Lapisan F Lapangan J Hermawan, Yulius Deddy wibowo, wibowo CO2 injection enhance oil recovery network model surface facilities simulation The Study of CO2 injection to enhance oil recovery through several stages before implementation on the pilot and full scale projects in the field had been done succesfully. The final stage of this study has been made by modeling of network and CO2 injection surface facilities that can be implemented in J Field. The developed model which is run by production simulator gave significant results both on the re-pressurized stage and CO2 flooding stage. This study showed that the implementation of CO2 injection could be run well. With the model validation through static and dynamic run, this study also reavealed that the network model and surface facilities could work properly. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2013-04-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/518 Seminar Nasional Teknik Kimia "Kejuangan"; 2013: Prosiding SNTKK 2013 (Arsip); F5.1-F5.8 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2013: Prosiding SNTKK 2013 (Arsip); F5.1-F5.8 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/518/478

oai:jurnal.upnyk.ac.id:article/519 2022-09-05T00:10:11Z kejuangan:ART

Dinamika Komposisi pada Sistem Tangki Pencampur 10 Liter Hermawan, Yulius Deddy Mixing-Tank step function dynamic behavior and stable response The liquid concentration dynamic behavior of a 10 L mixing tank has been studied experimentally. Tank with volume of 10 liter are designed and arranged for experimentation in laboratory. The tank has two input streams, stream-1 is the water-stream with its volumetric rate of f1 [cm3/sec] and stream-2 is salt solution with its volumetric rate of f2 [cm3/sec] and salt composition of c2 [gr/cm3]. Since the tank is designed overflow, the liquid volume in tank is always constant. In this work, the mass disturbance load has been made based on step increase and decrease. Those disturbance include the changes of the flow-rate input (f1 and f2) and the concentration of the input stream (c2). The dynamic behavior of mixing tank system has also been explored. As can be seen from our investigation in laboratory,the mixing tank with volume capacity of 10 liter produces a stable responce. Furhtermore, the open loop dynamic simulation using computer programing is also done, and its simulation result are compared with the experiment data from laboratory. The developed mathematical model of the mixing tank system has been solved analytically by laplace transform. The trends of simulation results are quite similar with those in our experiment results. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2012-04-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/519 Seminar Nasional Teknik Kimia "Kejuangan"; 2012: Prosiding SNTKK 2012 (Arsip); C15.1-C15.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2012: Prosiding SNTKK 2012 (Arsip); C15.1-C15.6 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/519/479

oai:jurnal.upnyk.ac.id:article/528 2022-08-15T06:15:48Z kejuangan:ART

Dinamika Suhu pada Sistem Tangki-Seri-Tak-Berinteraksi dengan Arus Recycle Dinamika Suhu pada Sistem Tangki-Seri-Tak-Berinteraksi dengan Arus Recycle Yulius Deddy, Hermawan Non-Interacting-Tank (NIT) step function dynamic behavior stable response Non-Interacting-Tank (NIT) step function dynamic behavior stable response This research studies the temperature dynamic behavior of non-interacting-tank (NIT) with recycle-stream which is frequently used in industries. Two tanks with volume of 25 liters are designed and arranged in series for experimentation in laboratory. Part of liquid from Tank-2 is recycled back to the Tank-1. In this work, the liquid volume of both Tank-1 and Tank-2 are remained at constant value. The heat disturbance load has been made based on both step increase and decrease. Those disturbances include the changes of temperature in input (T i) and recycle (TR) streams. The temperature dynamic behavior of NIT system has also been explored. As can be seen from our investigation in laboratory, both of Tank-1 and Tank-2 in NIT system produce a stable response to the disturbance change in temperature of the input and recycle streams. Furthermore, dynamic simulation using computer programming is also done, and its simulation results are compared with the experiment data from laboratory. The developed mathematical model of the NIT system is solved numerically. Such mathematical model is rigorously examined in Scilab software environment. This research also shows that the trends of temperature dynamic simulation results are quite similar with those in our experiment results. This research studies the temperature dynamic behavior of non-interacting-tank (NIT) with recycle-stream which is frequently used in industries. Two tanks with volume of 25 liters are designed and arranged in series for experimentation in laboratory. Part of liquid from Tank-2 is recycled back to the Tank-1. In this work, the liquid volume of both Tank-1 and Tank-2 are remained at constant value. The heat disturbance load has been made based on both step increase and decrease. Those disturbances include the changes of temperature in input (T i)and recycle (TR) streams. The temperature dynamic behavior of NIT system has also been explored. As can be seen from our investigation in laboratory, both of Tank-1 and Tank-2 in NIT system produce a stable response to the disturbance change in temperature of the input and recycle streams. Furthermore, dynamic simulation using computer programming is also done, and its simulation results are compared with the experiment data from laboratory. The developed mathematical model of the NIT system is solved numerically. Such mathematical model is rigorously examined in Scilab software environment. This research also shows that the trends of temperature dynamic simulation results are quite similar with those in our experiment results. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2010-01-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/528 Seminar Nasional Teknik Kimia "Kejuangan"; 2010: Prosiding SNTKK 2010; D10.1-D10.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2010: Prosiding SNTKK 2010; D10.1-D10.6 eng ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/528/481 https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/528/482

oai:jurnal.upnyk.ac.id:article/529 2022-08-15T06:15:48Z kejuangan:ART

Dinamika Level Cairan pada Sistem Tangki-Seri-Tak-Berinteraksi dengan Arus Recycle Yulius Deddy, Hermawan Non-Interacting-Tank (NIT) liquid level stable response unstable response This research studies the liquid level dynamic behavior of non-interacting-tank (NIT) with recycle-stream which is frequently used in industries. Two tanks with volume of 25 liters are designed and arranged in series for experimentation in laboratory. Part of liquid from Tank-2 is recycled back to the Tank-1. In this work, the mass disturbance load has been made based on both step increase and decrease. Those disturbances include the changes of flow-rate in input (fi) and recycle (fR) streams. The dynamic behavior of NIT system has also been explored. As can be seen from our investigation in laboratory, Tank-1 in NIT system produces a stable response to the disturbance change in flow-rates of the input and recycle streams. But, the liquid level response of Tank-2 is unstable. Furthermore, dynamic simulation using computer programming is also done, and its simulation results are compared with the experiment data from laboratory. The developed mathematical model of the NIT system is solved numerically. Such mathematical model is rigorously examined in Scilab software environment. The trends of simulation results are quite similar with those in our experiment results. As shown in our experiment and dynamic simulation results, this study is therefore considered useful to design a liquid level control configuration of NIT system for the next study. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2010-01-29 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/529 Seminar Nasional Teknik Kimia "Kejuangan"; 2010: Prosiding SNTKK 2010; D8.1-D8.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2010: Prosiding SNTKK 2010; D8.1-D8.6 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/529/483

oai:jurnal.upnyk.ac.id:article/3576 2023-05-13T06:56:28Z kejuangan:ART

Pembuatan Prototipe Alfa Gd Oksida dari Konsentrat Itrium Handini, Tri Pusparini, Wahyu Rachmi Amiliana, Rahmatika Alfia gadolinium xenotime sand extraction D2EHPA Making alpha prototype of Gd Oxide from yttrium concentrates. A prototype of Gd oxide has been made from yttrium concentrate that produced by xenotime sand. The process is carried out by extraction and deposition. The solvent used for the extraction process is D2EHPA with kerosene as diluent, and the deposition process with ammonia. Feed of extraction is yttrium concentrate which is dissolved in nitric acid and the pH is set. Determination of Gd content and other rare earth metal impurities were analyzed using X-ray fluorescence. The purpose of this study was to obtain relatively pure of Gd oxide. The variable that influence the separation process of Gd: pH of the feed solution, extraction time, ratio of feed and organic phase. This reaserach is obtained Gd oxide concentrate 5.1613 grams with the content of Y2O3 = 13.24%, Gd2O3 = 22.28% and Dy2O3= 2.27%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3576 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; A5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; A5 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3576/2697 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3577 2023-05-13T06:56:28Z kejuangan:ART

Optimasi Proses Ekstraksi Pektin Dami Buah Nangka Yustisia, Genta Adinda Sarifah, Siti Muftiyatus Subagyo, Purwo jackfruit rind extraction pectin Jackfruit rind is composed of thatch and thorns are usually only thrown into waste. While in the rind a content of pectin around 8%. Where pectin in the industrial world has many benefits, such as additional ingredients for making jelly. In this study extraction of pectin with jackfruit thorns. Thatch dried and mashed, 30 grams of thatch was extracted in a three neck flask with 300 ml HCl solvent. Extraction was carried out by varying solvent concentrations (0.01; 0.02; 0.04; 0.06; 0.08 and 0.1 N), and extraction time (30; 60; 90; 120; 150 and 180 minutes). The extract was filtered, then 96% ethanol was added and allowed to stand for one night to form a precipitate. The precipitate was washed with ethanol to neutral pH, and dried in an oven to a constant weight as dried pectin, then analyzed. Optimal operating conditions are achieved at an extraction temperature of 80 °C, a solvent concentration of 0.06 N,  with an extraction time of 90 minutes. The pectin taken was 11.6933% with a moisture content of 7.02%.. The analysis of pectin produced has an equivalent weight of 1470.5882; methoxyl content of 30.008%; galactonic acid levels 182.336%  Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3577 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; C1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; C1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3577/2698 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3578 2023-05-13T06:56:28Z kejuangan:ART

Asetalisasi Gliserol Produk Samping Industri Biodiesel Menjadi Solketal Menggunakan Katalis Amberlyst-15 Utami, Kidung Wulan Sulistyo, Hary Yuliansyah, Ahmad Tawfiequrrahman biodiesel acetalization crude glycerol solketal The government’s made a mandatory program to reduce greenhouse gas emissions by encourages the growth of biodiesel production. On the other side, the production of biodiesel has a by-product: glycerol. To improve the economics of the biodiesel production, it’s desirable to convert glycerol into value products: solketal, oxygenated fuel additives. Solketal can be used to reduce the particulate emission, improve cold flow properties etc. Solketal produced from acetalization of glycerol with acetone was conducted over a heterogeneous acid catalyst, Amberlyst-15, in a batch reactor. Acetalization crude glycerol for producing solketal with parameters: temperature and reaction time. The results indicated that at catalyst concentration 1%, the optimum condition in this acetalization: reaction temperature is 60°C and 90 minutes which have a conversion value of 51,90%. When compared to another glycerol, the higher conversion was obtained with pure ones which has a conversion value of 55,67%. Crude glycerol has low conversion because of its impurities, these are: water, sodium chloride and methanol in different amounts. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3578 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; E1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; E1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3578/2699 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3579 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Perbedaan Rasio Mol Gliserol dengan Asam Asetat dan Jumlah Katalis terhadap Konversi Reaksi Asetilasi Gliserol Menggunakan Katalis Karbon Teraktifasi-Asam Sulfat Zakiah, Zakiah Patmawati, Nurul Aprilia, Anisa Cahyani Maulida, Ika Rahma Hidayati, Nur glycerol acetins activated carbon solid catalyst Esterification of glycerol with acetic acid produces highly important oxygenated biofuel additives, which are generally called as acetins namely, mono acetyl glycerol, di acetyl glycerol, and tri acetyl glycerol. Individually, each acetylated product has its own potential applications in various fields. Generally, esterification of glycerol is performed over homogeneous mineral acids. However, the use of these mineral acids is usually limited by several technical and environmental drawbacks. The challenge is to replace them with highly efficient heterogeneous solid acid catalysts which are easier to separate from the products, stable at high temperatures and less toxic. This study is to perform activated carbon catalyst on esterification of glycerol by varying molar ratio glycerol to acetic acid (1:3, 1:4, 1:5, and 1:6) and amount of catalyst (3%, 5%, 7% and 9%). The highest conversion was about 81.19% which was performed at 1:6 molar ratio and 5% catalyst amount. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3579 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; E2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; E2 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3579/2700 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3580 2023-05-13T06:56:28Z kejuangan:ART

Pengujian Karbon Teraktivasi Asam Sulfat (KA-AS) sebagai Katalis pada Reaksi Asetilasi Gliserol Menjadi Triasetin Aprilia, Anisa Cahyani Maulida, Ika Rahma Hidayati, Nur glycerol acetylation triacetin solid catalyst activated carbon Tri acetyl glycerol or triacetin is one of the glycerol derivative products which can be used in various industries. The reaction of triacetin formation is an esterification reaction with glycerol and acetic acid. The esterification reaction of glycerol is slow reaction, therefore catalyst is needed to speed up the reaction. In this study, the acetin synthesis was carried out through esterification reaction  with glycerol and acetic acid using activated carbon catalyst. The temperature reaction was varied from 60 to 120oC and stirring speed was between 200 and 1000 rpm. The yield and conversion varied for different conditions, but in general, the conversion of acetin increased with time, temperature and stirring speed. The highest conversion was 79,18% and the selectivity is 21,31% monoacetin, 31,78% diacetin, and 46, 92%% triacetin which was obtained at a stirring speed of 1000 rpm at 120oC. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3580 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; E3 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; E3 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3580/2701 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3581 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh 5% MgO pada CuO-ZnO-Al2O3 sebagai Katalis Bifungsi untuk Sintesis Langsung DME dari Syngas pada Tekanan 15 Bar Wulandary, Indah Retno Ardy, Aisyah Aslamiah, Aslamiah Susanto, Edi Susanto, Herri direct synthesis of DME syngas bifunctional catalyst co-precipitation The application of fossil fuels for transportation and household is one of the main reasons for environmental issues. Imports of liquefied petroleum gas (LPG) are continuously rising up to 70%, while domestic production is constant or even decreases. Therefore, the Indonesian government encourages to use dimethyl ether (DME) as an alternative energy for LPG to reduce import. The objective of this study was developing a catalyst based in CuO-ZnO-MgO-Al2O3 as a bifunctional catalyst for direct synthesis of DME from synthetic gas. The mineral composition in the proposed catalyst was about 31:16:53 by mass. The preparation methods of the catalyst include co-precipitation and 5 hours calcination at 350℃. The performances of CuO-ZnO-Al2O3 (CZA) and CuO-ZnO-Al2O3 with 5% MgO (CZMA5) were observed. The catalysts were activated using a mixture of 5% H2 and N2 as reducing gas. Furthermore, the activity of the catalyst was tested by conducting a direct synthesis of DME from a synthetic gas consisting of 65% H2, 28% CO, 7% N2. The DME synthesis was carried out in a fixed bed reactor at 15 bar, with two different temperatures of 260 and 280℃. The maximum DME yield achieved by 0,12% using the CZA bifunctional catalyst at 260℃ and 15 bar. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3581 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; E4 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; E4 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3581/2702 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3582 2023-05-13T06:56:28Z kejuangan:ART

Analisa Indikasi Pembentukan Scaling Berdasarkan Simulasi Numerik Sumur Panas Bumi Herianto, Herianto Kristiati, M. Th. Bintarto, Bambang Asmorowati, Dewi silica scaling index geothermal well CMG-STAR modeling Scaling is one of the problems commonly found during geothermal fluid production. Scaling can form in production wells, two-phase pipes, and geothermal reinjection wells. Scaling in geothermal production wells is formed due to fluid from the reservoir which has been saturated by silica changing phases into two phases so that the sediment is formed. Scaling in geothermal production wells can reduce the diameter in the wells resulting in a decrease in geothermal fluid production. Scaling deposition is influenced by several factors, namely the concentration of silica in the fluid, pressure, and temperature. In this study, pressure and temperature decreases in the wells during the production process were analyzed using the CMG-STARS simulator. Based on the pressure and temperature data, the tendency for scaling to form is estimated based on the calculation of the Silica Scaling Index at several well depth intervals. Based on the SSI value, it is known that intervals that have the potential for scaling are at a depth of 50 m - 450 m and 967 m - 1745.5 m. Dryness and SSI values decreased at an interval of 550 m - 873 m because there was a zone of feed zone at a depth of 820 m. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3582 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; K1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; K1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3582/2703 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3583 2023-05-13T06:56:28Z kejuangan:ART

Simulasi Life Cycle Assessment (LCA) Proses Produksi Gula di Brazil dengan OpenLCA Sudibya, Alfian Hayu Anasstasia, Titi Tiara Azis, Muhammad Mufti Sarto, Sarto Life Cycle Assessment environment sugar factory GWP Sugar is one of the most important agricultural commodities for mankind. Brazil is one of the largest sugar cane producers in the world, so dosing environmental impacts on the sugar production process in Brazil can be a reference for other countries. In addition to increasing environmental awareness, the sugar industry must also use environmentally friendly and sustainable processes. The Life Cycle Assessment (LCA) is one of the most important methods for measuring the environmental impact of a process. The aim of this study is to measure the environmental impact of the sugar production process in Brazil. LCA simulations are carried out with the OpenLCA software, which is equipped with an ecoinvent database. The scope of the life cycle assessment simulation includes the planting of sugar cane in the process of sugar production (cradle to gate). The results of the environmental impact assessment show the value of the global warming potential (GWP) of 304.73 kg CO2 equivalent per ton of sugar products. From this value, the bigest contribution to the GWP is the sugar milling process, which is 1544 kg CO2 equivalent per ton of sugar products. The plantation sector now contributes -2681 kg CO2 per ton of sugar products, as it plays a role in absorbing CO2 in the environment for sugar cane growth. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3583 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; K2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; K2 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3583/2704 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3584 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh pH dan Suhu Ekstraksi Zat Warna Alami dari Limbah Sabut Kelapa Muda (Cocos nucifera) pada Pewarnaan Kain Batik Mori Prima Non Mordan Haerudin, Agus Purnomo, Muhammad Ridwan Andi Ma’mun, Sholeh young coconut fiber (cocos nucifera) natural dyes batik cotton fabric Phytochemical test results of positive young coconut coir extract containing flavonoids and alkaloids from anthocyanin pigments that have potential as natural dyes. In general, the manufacture of natural dyes affected by many factors namely pH, temperature, light and oxygen. The purpose of this study was to determine the effect of pH and temperature extracting natural dyes from young coconut coir waste on the value of color quality test on the application to the coloring of not mordant batik fabric (Mori Prima). The method used was an experiment by varying the temperature (60 ℃, 80 ℃, 100 ℃) and pH (Neutral 7, Acid 2, Base 12), the results of the dye extract were applied to the coloring of not mordatn batik fabrics (Mori Prima), the results of the coloring application were tested for quality the color is the solution's absorbance color test, the color fastness in washing and the color aging level, the results of the coloring application are carried out a test of the color quality, namely the color absorbance test of the solution, the color fastness of the washing and the color aging level. The results showed the highest absorbance value of 1.5203 and the best color aging value of 14.25 from the variation of the acid pH treatment, and the extraction temperature of 100 ℃, the results of the color fastness test on washing the average value obtained 4 showed that the color quality of young coconut fiber has a value of fastness in washing in the good category. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3584 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3584/2705 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3586 2023-05-13T06:56:28Z kejuangan:ART

Proses Electroforming Tembaga pada Bahan Acrylic untuk Prototype Canting Cap Batik Setiawan, Joni Eskani, Istihanah Nurul acrylic batik stamp electroforming stamp canting The stamp canting is the main equipment of sticking malam (batik wax) on stamp batik. The process of making stamp canting was manually process, human resources working on stamp canting and the price of copper raw material which continues to be an obstacle for the stamp canting industry. Therefore it is necessary to develop materials and production techniques to make them more efficient. This study aims to diversify stamp canting materials and their production processes. The research method used is the experimental method. The material of stamp canting was acrylic. Cutting batik motifs is done manually with a saw. The next process is to coat the acrylic with copper use electroforming process. The conductor material is coated in 1 layer, 2 layers, and 3 layers carbon conductive paint. The canting cap prototype is made of 5 cm x 5 cm x 0,5 mm. The Electrolyte solution contained of 450 grams of copper sulfate and 150 ml of sulphuric acid and 3 liters of distilled water The variables that will be examined are the influence of the number of carbon layers, stress, current strength and time on the copper coating on the acrylic prototype of stamp canting. Based on the experimental results obtained by the process of electroforming with 1 time and 2 layers of conductive paint, copper can not coat the entire sample. The new electroforming process reacts well to 3 layers of conductive paint. The optimum voltage for electroforming is 1 volt. The time needed to coat the sample until it was fully covered in 120 minutes (2 hours). Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3586 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L7 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3586/2707 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3587 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Penambahan Silika Carbon Nanotube dalam Membran sPEEK PVA terhadap Karakteristik Membran pada Sel Bahan Bakar Metanol Imannurya, Pramita Cindy Hidayati, Nur DMFC SPEEK PVA Silica carbon nanotube Recently, the efforts of finding proton exchange membrane (PEM) to replace Nafion membrane which is the important component in direct methanol fuel cell (DMFC) has been done continuously. The aromatic polymer of  polyether ether ketone (PEEK) had been developed because this polymer have good chemical, mechanical, and thermal stabilities. High proton conductivity, good mechanical stability, and low methanol permeability are desirable characteristic of the membranes. Composting polymers and/or addition inorganic material is strategies to improve characteristic of membranes. The addition of silica coated carbon nanotubes (SCNTs) would be capable to increase proton conductivity of sPEEK-PVA membrane. This research aims to study the characterization of PEEK membrane combined with PVA and varied silica carbon nanotubes (SCNTs) of 2,5-10% w/w. The experiment result showed that water uptake in the range of 30.7-57.7%, swelling degree in the range of 10-25%, ion exchange capacity (IEC) in the range of 0.48-0.59 meq/g, and methanol permeability in the range of 2.3-4.5 x 10-6 cm2/s. These prepared membranes exhibitted a promising performance even though further investigations should be taken into account. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3587 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L8 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L8 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3587/2708 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3588 2023-05-13T06:56:28Z kejuangan:ART

Perbaikan Sifat Pengikatan Semu pada Semen Portland Putih Menggunakan Ground Granulated Blast Furnace Slag (GBBFS) Karim, Gaos Abdul Devinta, Ike Budiadi, Dedi GBBFS false set white portland cement Research to overcome the nature of false set in white Portland cement using ground granulated blast furnace slag (GBBFS) was carried out by mixing white Portland cement, which experienced false sets, with GBBFS. The addition of GBBFS to the GBBFS-cement mixture is 5%, 10%, 15%, 20%, 25%, 30%, 40%, 50%, 60% and 70%. Whiteness test and false set results show that the addition of GBBFS will reduce the whiteness of the mixture to 80% by 42% of GBBFS, while the addition of 6% of GBBFS will begin to overcome the problem of false set of white-GBBFS cement mixture, but other considerations due to white cement specifications must be considered to keep white cement meeting standard specifications. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3588 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L10 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L10 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3588/2709 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3589 2023-05-13T06:56:28Z kejuangan:ART

Efek Kombinasi Natrium Hipokhlorit dan Pemutih Optis dalam Proses Bleaching dan Pengaruhnya Terhadap Kualitas Bahan Tekstil Khaliq, Ab Dulmalik Chafidz, Achmad Fitri, Nadia Ulfa Paramitha, Syskha Yusrina bleaching sky stabilyzer natrium hipoklorit optical bleaching agent Bleaching is a process that aims to eliminate the lignin content (natural pigment) in the pulp or fiber to obtain a high and stable color brightness. The fiber bleaching process must use reactive chemicals to dissolve the lignin content in the fiber to obtain a high degree of brightness. The bleaching process is affected by the amount of Natrium hipoklorit and Optical Bleaching Agent (OBA). The higher the use of Natrium hipoklorit as a whitening agent, the higher the percentage reduction in weight on the fabric and the white level on the fabric, the greater the weight. In this study the concentration we used was 20 ml, 40 ml, and 60 ml. The higher the experimental concentration, the higher the degree of white, the stiffness and the resulting flexibility. In the bleaching process using Natrium hipoklorit is also affected by the chemical Sky Stabilyzer which serves to slow down the decomposition of Natrium hipoklorit so that it can produce a maximum white degree. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3589 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L11 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L11 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3589/2710 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3590 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Variasi Konsentrasi Gliserol pada Edible Coating dari Ekstraksi Pektin Limbah Kulit Durian sebagai Pengawet pada Cabai Rawit Merah untuk Memperpanjang Masa Simpan Dewi, Idama Kusuma Khoirina, Naila Imani, Nadya Alfa Cahaya durian peel red chili pepper pectin extraction edible coating glycerol Durian skin waste is an agricultural waste that has great potential if it is further processed. Durian skin waste itself is abundant in the Gunungpati area, Semarang, which produces agricultural commodities in the form of durian fruit. However, the utilization of agricultural commodities has not been done to the fullest because durian skin is just thrown away so that it accumulates and it leads to a bad smell. Of course, this disturbs the surrounding environment because of the presence of piles of durian skin waste. Previous research proved that durian skin waste has a high pectin content. The high pectin content can be used as an edible coating on red chili peppers. Red chili pepper is an agricultural commodity that can rot easily even during the distribution process so that it affects the selling price of red chili pepper. The purpose of this study was to obtain the right formulation of durian skin pectin edible coating. This research consisted of two steps, namely extraction of pectin from durian skin and coating of red chili using extracted pectin. The results of the study prove that the use of an edible coating that has been prepared can reduce the weight loss that occurs during the shelf life of 15 days, from 39.25% to 16.25%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3590 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L13 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L13 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3590/2711 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3591 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Konsentrasi H2SO4 (Asam Sulfat) pada Proses Hidrolisis dan Waktu Fermentasi Terhadap Pemanfaatan Limbah Sagu Menjadi Bioetanol Ahmad, Adrianto Muria, Sri Rezeki Hilmiyati, Hilmiyati fermentation glucose hydrolysis sago waste SHF Bioethanol is a renewable alternative energy source that can be used as an alternative fuel. Bioethanol is a fermented product that can be made from substrates that contain carbohydrates (sugar, starch, cellulose). Sago pulp is a very abundant biomass that has not been utilized properly, so far sago pulp has only been used as fertilizer and animal feed. Biomass containing cellulose such as sago pulp can be converted into bioethanol through hydrolysis and fermentation processes. The purpose of this study is to examine the use of sago pulp as a raw material in the manufacture of bioethanol, determine the effect of sulfuric acid concentration on the hydrolysis process and determine the optimum time of bioethanol production by the method of separate hydrolysis and fermentation (SHF). The steps taken in this research were pretreatment of sago pulp using NaOH 1M. Acid hydrolysis using H2SO4 with variations in concentrations of 1 M, 2 M and 3 M at 100oC with a reaction time of 3 hours. The fermentation process uses Saccharomyces cerevisiae with a variation of fermentation time of 1 day, 2 days, 3 days, 4 days and 5 days. The results showed the highest sugar content was found in the hydrolysis process of sago pulp with the addition of 2M sulfuric acid concentration which was 134.08 g / L. The highest levels of bioethanol in the SHF process were also obtained at 4 days fermentation for 8% or 63.14 g / L. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3591 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; F1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; F1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3591/2712 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3592 2023-05-13T06:56:28Z kejuangan:ART

Produksi Biohidrogen dari POME (Palm Oil Mill Effluent) Menggunakan Bioreaktor Hibrid Anaerob dengan Variasi Waktu Retensi Hidrolik Ahmad, Adrianto Evelyn, Evelyn Avriliani, Dini Anaerob hybrid bioreactor biohydrogen COD COD removal POME Along with the increasing in the area of oil palm plantations, palm oil mill production has also increased. Palm oil mill produces liquid waste with high content of organic compounds. If it is discharged into waters it has the potential to reduce water quality and pollute the environment. Waste water treatment can be do with anaerobically and using anaerobic hybrid bioreactor. This study aims to test the stability and performance of anaerobic hybrid bioreactors with variations in HRT and parameters measured by COD (Chemical Oxygen Demand), acetic acid, VSS (Volatile Suspended Solid), volume of H2 gas and H2 gas. This operation is carried out by varying the hydraulic retention time and the working volume of the reactor 12,5 L, starting from the HRT of 6 hours with flow rate 2,0833 L/day, then the HRT 12 hours with flow rate 1,0417 L/day, and the last HRT 18 hours with flow rate 0,694 L/day. The highest reduction in COD was obtained was 5,200 mg/L with a COD removal efficiency of 92,2%, acetic acid 6 g/L, VSS 7,6 g/L. Thus the anaerobic hybrid bioreactor becomes the one alternative that can be used in treating liquid was that has a high enough organic content. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3592 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; F2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; F2 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3592/2713 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3593 2023-05-13T06:56:28Z kejuangan:ART

Pembuatan Nata de Cheese dari Whey Keju Menggunakan Bakteri Acetobacter xylinum Erawati, Emi K, Tita Agustin whey cheese fermentation ethanol glucose Michaelis-Menten constant Cheese production produce waste namely whey cheese. This research studies the effect of concentration (7%, 10%, 20% v/v)  and pH (4, 4.25, 4.5.) on the fermentation of whey cheese and to investigate Michaelis-Menten constant and maximum productivity. Whey cheeses were made from amount of 500 mL whey cheese waste, added 50 g of sugar, 6 g of ammonium sulfate and 20% w/w Acetobacter xylinum. The whey cheese wastes were fermentation processes for 0, 4, and 8 days. Every 0, 4, and 8 days wastes were measured for calculating glucose and ethanol level. The Michaelis-Menten constant and Vmax have been evaluated. Fermentation of cheese waste was carried out at room temperature for 8 days. The results showed the highest ethanol percentage at pH 4 and concentration of 10% v/v are 57.2521% and 30.8540% respectively. On the other hand the highest glucose percentage in the variation pH of 4 and concentration of 20% v/v are 16.99%. From the calculation of the kinetic reaction using Lineweaver-Burk plot in the variation of concentration get Vmax and KM obtained are 5.106 ppm.day-1 and KM 2,9266.107 ppm1 in that order. While in the variation of pH get Vmax and KM are 1.106 ppm.day-1 and KM 4,95.106 ppm-1 separately. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3593 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; F3 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; F3 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3593/2714 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3594 2023-05-13T06:56:28Z kejuangan:ART

Ketahanan Sifat Antibakteri Kain Batik Teraplikasi Nanopartikel ZnO Eskani, Istihanah Nurul Haerudin, Agus Setiawan, Joni Farida, Farida Isnaini, Isnaini Lestari, Dwi Wiji Astuti, Widi antibacterial batik ZnO nanoparticles durability home laundering Batik has became a part of Indonesian life since ancient times. Nowadays batik is used in daily life both as clothing and household appliances. Therefore it is very important to develop antibacterial batik. This paper presents the results of antibacterial durability tests on batik after repeated laundering. Antibacterial batik was made by applying ZnO nanoparticles to the fabric before and after the batik process using the pad-dry-cure method. Antibacterial properties were tested using the agar diffusion method by measuring the zone of growth inhibition of the Staphylococcus aureus bacteria around the ZnO applied batik cloth. Antibacterial durability was tested by the Launder-O-meter method according to SNI ISO 105-C06:2010. Laundering test was done 4 times which is equivalent to 20 times home laundering. The test results showed that batik which was applied by ZnO nanoparticles before the batik process showed a decrease in antibacterial activity by 78.68% while batik which was applied by ZnO nanoparticles after the batik process showed a decrease in antibacterial activity by 44.74%. Application of ZnO nanoparticles can provide antibacterial properties in batik cloth with a durability of more than 20 times home laundering. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3594 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L6 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3594/2715 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3596 2023-05-13T06:56:28Z kejuangan:ART

Pemurnian Batuan Emas Ramah Lingkungan Menggunakan Teknik Sink and Flotation dengan Media Tribromometana Setyoningrum, Tutik Muji Murni, Sri Wahyu Haryono, Gogot Maslakhah, Rizki Murti, Riris Indra sink and float tribromomethane aqua-regia Separation of gold from its ore by sink and float method with tribromomethane as a medium is considered economical and environmentally friendly due to the absence of Mercury used in the process. The sink and float technique is based on the specific gravity difference among each constituents. The ore was initially cleaned, washed, crushed and then sieved to obtain various powder sizes, equivalent to 20, 50, and 80 mesh size. The characterization was performed by means of XRD and XRF analysis to determine the initial gold content. Afterward, the ore were processed by using 300 ml tribromomethane, so that two phases, namely the sinking and floating phase, will be formed. Each phase was then undergone weighing, drying and purifying or destructuring by using aqua regia. The results show that the optimum yield of 5.87403% with a gold content (Au) of 0.25976%, was obtained in the sinking phase for 80 mesh size with 3 M tribromomethane concentration and in the floating phase having 0.000001756% with gold content of 0.0000001568%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3596 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; A8 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; A8 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3596/2716 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3597 2023-05-13T06:56:28Z kejuangan:ART

Pengaturan Parameter Kendali Level pada Vapor Absorption Chiller dengan Menggunakan Metode Tuning Internal Model Control (IMC) Suharti, Profiyanti H. Sa’diyah, Khalimatus Saputra, Gagah Arga Raya Nurrisky, Meydana level control system synthetic fibers condensat storage tank Vapor Absorption Chiller (VAC) is one of the equipment in the process of making synthetic fibers, which produce chilled water with energy from heat sources, rather than electricity. The heat source can be steam. VAC works like the concept of a refrigerant compression cycle. one of the equipment in the VAC cycle is the condensate storage tank. This tank has a level control system to control the amount of condensate that is accommodated. In one of the synthetic fiber manufacturing industries, the condensate level control system in VAC (LIC81403) works as non self regulating process. The control process runs following the integrating process character. This control system requires special techniques for tuning the PID control parameters At present conditions, the control parameters used in LIC81403 are 40% proportional band (Pb) and 4 minutes integral time. These parameters produce oscillating condensate levels, with repeated amplitude waves. Internal model control (IMC) tuning method for integrating process was applied in this controller. The parameters of the tuning results are simulated to find out the LIC81403 controller response. Some parameters were applied at the plant and obtained the best performance with a proportional band (Pb) parameter of 45.45% and an integral time of 4.54 minutes. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3597 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; B9 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; B9 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3597/2717 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3598 2023-05-13T06:56:28Z kejuangan:ART

Simulasi Reservoir Heavy Oil dengan Multistaging Development Modifikasi Inverted 5-Spot Kombinasi Cyclic Steam Stimulation (CSS) dan Steamflooding Swadesi, Boni Suranto, Suranto Widiyaningsih, Indah Widyaningsih, Ratna Murni, Sri Wahyu Heavy oil Steamflooding CSS Recovery Factor and CSOR Oil Field development with a heavy oil reservoir is needed by obtaining an advanced stage (Enhanched Oil Recovery / EOR). Steam Injection applied to the reservoir to increase heavy oil recovery. Thermal Enhanced Oil Recovery (Thermal EOR) is one of the methods in obtaining advanced heavy oil recovery. Generally, thermal injection is carried out to reduce the viscosity which has an effect on the mobility ratio. There are various mechanisms in thermal injection and one of them is the method of injection of steam into a reservoir. The purpose of this research is to provide a comparison between the performance of steamflooding and the combination of CSS and steamflooding using multistaging pattern development. In this reservoir modeling a comparison of 2 scenarios will be made where the first scenario is steamflooding and the second scenario is a combination of steamflooding with Cyclic Steam Stimulation (CSS). This modeling using CMG STARS 2015 software because it is one of the CMG parts for thermal injection. This modeling is carried out to plan fully, so that there is no history matching process to production data. Both of these methods are compared with basecase inverted 5-spot steamflooding without development. It is intended to see a comparison of the conditions of development and without development with the same complex. The final result of this reservoir simulation is comparing the steamflooding scenario and the combined scenario with the effect of the CSS stimulation method. The best scenario is obtained from a scenario that has high RF results and low CSOR. The steamflooding scenario produces RF 71.86%, Np 265645 bbl, and CSOR 8.268. The CSS and Steamflooding scenario produces RF 72.38%, Np 267555 bbl and CSOR 8.029. This multistaging pattern scenario succeeded in raising RF with a 5-spot basecase scenario for 25 years that only produced RF 16.88%, Np 62391.3 bbl, and CSOR 10.194. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3598 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3598/2718 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3599 2023-05-13T06:56:28Z kejuangan:ART

Kinetics Study on Lithium Leaching of Spent Lithium Iron Phosphate Batteries in Low Concentration of Sulfuric Acid Dyana, Zaizamshimi Nurul Farah Perdana, Indra Prasetya, Agus Leaching Kinetics study Spent lithium iron phosphate batteries Sulfuric acid Lithium Recovery of valuable metals from spent lithium iron phosphate (LiFePO4) batteries are quite challenging because it needs a lot of process. The recycling of these spent batteries can avoid environment contamination from the waste, meanwhile the valuable metallic components in the batteries including lithium can be treated as a resource for potential recovery of lithium. Low concentration of sulfuric acid (H2SO4) as a leachant and hydrogen peroxide (H2O2) as an oxidant, was used to leach elements from cathode materials of spent LiFePO4 batteries that mainly contained Li, Fe and P. Li could be selectively leached into the solution and while Fe and P was assumed to remain in the residue. The significant effects of acid concentration, solid-liquid ratio, reaction temperature and reaction time on the leaching rate are determined. Under the optimum conditions of 0.1 M H2SO4, 2 vol% H2O2, S/L ratio of 75g/L, 60 °C and 60 min, the leaching efficiency determined were 74.74% for Li and 0.99% for Fe. A leaching mechanism of shrinking-core model with diffusion through product layer control was proposed. It was found that the apparent activation energy was 12.69 kJ mol-1 as calculated by the Arrhenius equation together with an enthalpy (∆H) of 10 kJ mol-1 and an entropy (∆S) of -264.54 Jmol-1K-1. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3599 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G2 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3599/2719 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3600 2023-05-13T06:56:28Z kejuangan:ART

Peramalan Kinerja Reservoir Lapangan Panas Bumi Gunung Iyang-Argopuro, Jawa Timur, Indonesia Menggunakan Simulasi Numerik TOUGH2 Asmorowati, Dewi Lukmana, Allen Haryanto Haty, Intan Paramita Sulistiyani, Intan Mount Iyang-Argopuro field devolopment reservoir simulation TOUGH2 The Mount Iyang-Argopuro geothermal field is a prospect field located in East Java, Indonesia. This field has a water-dominated reservoir and still in the exploration stage. Therefore, this study was conducted to find out how the production capacity of the Mount Iyang-Argopuro reservoir. The scenario of field development is done by simulating a reservoir model that has reached a natural state. The model was created and simulated with a TOUGH2 simulator, assuming the field will be produced for 30 years with a production capacity of Iyang-Argopuro geothermal field is 55 MW. Several production scenarios are tested on the model to obtain an appropriate production target. Based on the simulation results, a production capacity of 55 MW for 30 years was achieved with 9 production wells. Fluid from the wells flow to a 9 bar pressurized separator and an 8.5 bar turbine pressure. Despite the decline in production, the scenario is still able to maintain generating capacity above 55 MW. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3600 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; A2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; A2 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3600/2720 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3601 2023-05-13T06:56:28Z kejuangan:ART

Pendugaan Kedalaman Air Tanah Menggunakan Metode Geolistrik Konfigurasi Schlumberger di Kampus Universitas Pembangunan Nasional “Veteran” Yogyakarta Ratminah, Wawong Dwi Firmansyah, Ilham Suyono, Suyono Siri, Hasywir Thaib Sihir, Hartono Rosadi, Peter Eka Cahyadi, Tedy Agung Suharyadi, Heru Vergiagara, Vega Yulianto, M. Rahman groundwater geoelectric method aquifer Schlumberger configuration. Groundwater is a potential resource for meeting human water needs. The existence of groundwater is closely related to the characteristics of aquifers in an area. This study aims to determine the characteristics of aquifers. This research aims to determine the characteristics of the aquifer which includes the type of material and the thickness of the aquifer. The method used in this study is the geoelectric method with the Schlumberger configuration. The study was conducted on 9 sounding points in 1 track. The data obtained is then processed using IP2WIN software to produce a subsurface bedding model based on its resistivity value (2D). Based on the structure model of the subsoil, it is obtained: a) clay layer with depth between (0.5 - 8.9 m). b) groundwater aquifer layer with depth (8.9 - 25 m). c) clay layer with depth (> 25 m). Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3601 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; A4 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; A4 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3601/2721 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3602 2023-05-13T06:56:28Z kejuangan:ART

Pengolahan Pasir Silika Lokal Skala Pilot Plant sebagai Pengganti Pasir Standar Ottawa untuk Pengujian Kuat Tekan Mortar Semen Rachmawati, Titi Pratiwi, Wieke Karim, Gaos Abdul silica sand sidrap sand ottawa sand compressive strength of mortar cement. This research is the development of laboratory scale research on the use of local silica sand in Indonesia as a substitute for Ottawa standard sand for cement mortar testing. From several local silica sands in Indonesia, Sidrap sand originating from South Sulawesi was selected for further development on a pilot scale. Silica sand processing included the process of washing, drying, sieving or gradation in accordance with ASTM C778. The characterization of the processed silica sand included SiO2 content, sludge content, petrological analysis, roundness, and cement mortar compressive strength test at 3, 7 and 28 days and the results were compared to those of standard Ottawa sand. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3602 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; A6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; A6 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3602/2722 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3603 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Penggunaan Arang Aktif Teraktivasi Fisika terhadap Desalinasi Air Payau Desa Kemudi Gresik Mustakim, Zainal Purwaningtyas, Fiska Yohana Pratama, Bagas Aji Anam, Choirul activated carbon adsorption Kemudi Village salinity Kemudi village is one of the villages located in Gresik Regency is inhabited by people who live in pond farmers, this is because the Kemudi village is located in the middle of the pond. With this locations, it was found the problems of scarcity and limited freshwater resources which are utilized as clean water. Well water with high salinity levels as a result of the high content of Cl as salt and visual appearance of water that was yellow and murky, it made the well water in Kemudi village exceeded the standard quality Minister of Health Regulation No.32, 2017. One alternative for processing brackish water into freshwater is using activated carbon adsorbent method which physically activate with 400oC in furnace for 30 minutes. This study aimed to determine the appropriate contact temperature (30oC, 40oC, and 50oC) in adsorption process with contact for 60 minutes using activated carbon particle size of 60 mesh. From this research, the color of water became <0.2 TCU with 0 NTU turbidity, removed organic substances up to 0.42 mg/L, a total Fe of 0.088 mg/L and decreased of 9.31% Cl ion content. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3603 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; A7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; A7 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3603/2723 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3604 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Ukuran Zeolit Teraktivasi terhadap Salinitas Air Payau di Desa Kemudi dengan Metode Adsorpsi Purwaningtyas, Fiska Yohana Mustakim, Zainal Umaminingrum, Mega Tri Ghofar, Muhammad Abdul adsorption zeolite salinity brackish water Water in the Kemudi Village was categorized as brackish water, so fresh water was difficult to obtain in this village. Salinity of water in the village of Kemudi reached 30.11 g / L. This high salinity caused residents to have buying clean water from other villages for their daily needs. One way to convert brackish water into fresh water was by the adsorption method. This study examined brackish water desalination using an adsorption method with activated zeolite adsorbents. Zeolite could reduce water salinity in the Kemudi village in accordance with clean water quality standards. This experiment was conducted to determine the effect of zeolite size and room temperature on water salinity. The sizes used were 841 microns (20 mesh), 250 microns (60 mesh), and 149 microns (100 mesh). Water in the Kemudi Village had Cl- content of 9,128.38 mg/L. Activated zeolite could reduce Cl- levels better than non-activated zeolite. The size of zeolite influenced the levels of Cl- absorbed. For the size of 20 mesh the Cl- level dropped to 8082.60 mg/L, for the size of 60 mesh was 8188.95 mg/L, and for the size of 100 mesh was 8255.31 mg/L. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3604 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I7 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3604/2724 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3605 2023-05-13T06:56:28Z kejuangan:ART

Study of Malachite Green Adsorption using Tannin-Based Adsorbent (TBA) from Mangrove Bark (Rhizophora mucronata) Fangidae, Theodorus Sandy Bage, Thomas Morus Papo Anggorowati, Adriana Anteng Sudaryanto, Yohanes adsorption malachite green tannin-based adsorbent mangrove bark The growing of industrial activity causes side effects in the form of environmental pollution. One of the causes of environmental pollution is the content of Malachite Green (MG) in wastewater. When consumed, water consists of high MG levels can cause health problems, such as immune system disorders, cancer triggers, and DNA damage, so it is necessary to reduce MG levels before being discharged into the environment. Adsorption is one method to reduce MG levels. One of the raw materials for making adsorbents is mangrove bark, because it contains 20-30% crude tannin, by changing it to Tannin Based Adsorbent (TBA). This study aimed to study the MG waste adsorption using TBA from mangrove bark. In this research, tannin was obtained by extraction using Microwave Assisted Extraction (MAE) method, then it was modified to TBA through a polymerization process using formaldehyde. Analysis using FTIR Spectrophotometer was conducted to confirm the functional groups of TBA and standard tannin. After that the adsorption process is carried out by varying the ratio of the adsorbent mass : waste volume, temperature and adsorption time. MG content analysis was performed using a UV-VIS Spectrophotometer. SEM analysis was done to observe the surface of TBA before and after the adsorption process. The results showed that the highest percent MG removal was achieved at an adsorbent mass ratio: MG volume of 1: 100 gram / mL, adsorption temperature of 60ºC, and adsorption time of 120 minutes. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3605 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L9 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L9 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3605/2725 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3606 2023-05-13T06:56:28Z kejuangan:ART

Optimisasi Pemompaan dan Penyaringan Air Bawah Tanah dari Goa Tuk Sarining Kembang untuk Memenuhi Kebutuhan Air bagi Warga Desa Gebang dan Sekitarnya Purwanto, Heru Sigit Sugiarto, Bambang Fatchurohman, Dedi water gravity sand filter TDS Water is main resources needed for daily life in Gebang Hemlet, Girisuko Village,  Gunung Kidul District, Special Region of Yogyakarta. Gebang is one of many hemlet in the Panggang sub-district, District of Gunung Kidul, with scarce water resources. In this hemlet there are about 170 family with around 4 members for each family, which amount to 680 people with limited water resources to fulfill their necessity. Water supply for this village is limited by by the available pump capacity. To date, people in the hemlet rely on water from rainfall during rainy season which is collected to a special water tank that was prepared as a reserve for dry season, while some villager uses water from caves. However, the pump is now out of order, so people have to purchase their water needs from water truck seller. Material adsorbed in karst medium is interrelated between organic substance (Coliform Parameter) and inorganic substances (TDS Parameter), so that by using laboratory processing, with Gravity Sand Filter chosen as additional process, using zeolite with 40-50 cm in thickness will have the capability to reduce TDS from around 232-268 ppm to below 180 ppm. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3606 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; A10 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; A10 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3606/2728 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3607 2023-05-13T06:56:28Z kejuangan:ART

Evaluasi Proses Pengambilan Beta Karoten sebagai Sumber Zat Warna Alami dari Ubi Jalar Kuning Purwanti, Ani Putri, Maria Egenia Vivian Eksi Alviyati, Nadia beta carotene yellow sweet potato extraction ethanol Yellow sweet potato (Ipomoea Batatas L.) or yam is an agricultural commodity as a source of carbohydrates which contained beta carotene. Beta carotene can be treated as an antioxidant to maintain an effective immune response. Beta carotene has been commonly used to provide a yellow to orange color for food. Replacement of synthetic dyes with a natural resource such as beta carotene is preferable. Beta carotene can be obtained from yellow sweet potatoes by alcoholic extraction. This research aims to evaluate the amount of solvent used and the speed of stirring in the extraction process. This research has been conducted by extraction using ethanol as a solvent. The stirring speed variation is carried out at 100-500 rpm, while the volume of the solvent in the extraction process is varied from 50 mL to 250 mL. The process temperature of 80° C, the processing time of 120 minutes, stirring speed of 500 rpm, a ratio of 50 grams of material, and a volume of 200 ml of solvent obtained the optimum amount of extracted beta carotene is 2980.785 μg / 50g. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3607 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G3 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G3 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3607/2729 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3609 2023-05-13T06:56:28Z kejuangan:ART

Kesetimbangan Cair-cair untuk Perhitungan Jumlah Tingkat Mixer Settler pada Pemisahan Konsentrat Neodimium dari Itrium Pusporini, Nur Dewi Sediawan, Wahyudi Budi Sulistyo, Hary Pusparini, Wahyu Rachmi mixer settler extraction neodymium concentrate yttrium stage to stage calculation Neodymium (Nd) as raw material for permanent magnet begins to globally develop in various fields. The magnetic quality is far better than other materials such as iron, Al-Ni-Co, Sm-Co, and Sm-Fe-N alloy. However, Nd must be separated from other elements especially yttrium (Y). The presence of Y can reduce the quality of permanent magnet produced since Y has magnetic properties opposite to Nd. One of the separating methods that can be applied is liquid – liquid extraction. Extraction was carried out by using 10% of di-ethyl-hexyl-phosphate (D2EHPA) as the solvent. Information on the phase equilibrium is of importance in the design of large scale extraction system. With a stirring speed of 200 rpm the phase equilibrium conditions were reached after 25 minutes. This study aimed to generate phase equilibrium data and to develop mathematical model to quantitatively describe the phase equilibrium, then to predict the number of extraction stages for the separation. The calculation was done by using stage to stage calculation method based on the mass balance and liquid-liquid equilibrium model proposed. The result shown the number of stages to separate Y from Nd concentrated by using mixer settler is 6 stages with the total recovery of Y is 93%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3609 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G4 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G4 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3609/2730 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3610 2023-05-13T06:56:28Z kejuangan:ART

Ekstrak Sabut Kelapa (Cocos nucifera) Sebagai Biomordan pada Bahan Tekstil Dengan Pewarna Alami Daun Jati (Tectona grandis L.f) Priambudi, Ruli Aji Tarigan, Kendi Timothy Siswanti, Siswanti extraction coconut fibers teak leaves biomordant Natural dyeing is a promising process to reduce environmental pollution caused by the use of synthetic dye. Teak leaves contains anthocyanin, providing a red color. While the disadvantage of natural dye is the quality is not as good as synthetic dye, the use of biomordant could be the solution, because tannin compound it contains could enhance the quality of natural dye. The aim of this research is to : (1) Study that coconut’s fibers could be used as a biomordant. (2) Study the effect of tannin’s concentration to the quality of dye extract on fibers surface. (3) Study the effect of pH to the quality of dye extract. The leaves of the teak tree was extracted using boiled water for 30-minute, where the pH condition is set to 2-6 with HCl. The coconut’s fibers was extracted using boiled water for 30-minute, where the concentration may vary from 50gr/L to 250gr/L. The result shows that the optimum pH condition is at pH 6.6 (blanco), the best fastness result were carried out by coconut fibers concentration of 15% (m/v) – 25% (m/v), and the desecration scores shows that all the coconut fibers concentrations were 4-5 (good). Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3610 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G5 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3610/2731 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3611 2023-05-13T06:56:28Z kejuangan:ART

Desalinasi Air Payau Desa Kemudi Gresik Menggunakan Adsorben Zeolit Teraktivasi Purwaningtyas, Fiska Yohana Mustakim, Zainal Rohmah, Zan Nubah Arifah Chafsoh Anastasya, Tarisa Dwi adsorption zeolite salinity brackish water The availability of clean water was the main focus in areas with land topography of 2 m above sea level, such as in the Kemudi village of Duduk Sampeyan District, Gresik. Salinity that reached 30.11 g / L made the water in this village included in brackish water. Adsorption was known to reduce the value of water salinity so that the water could be used by residents. In this study physically activated zeolite adsorbents at 400oC were used. Zeolites were able to absorb salts in water, so salinity of brackish water could be lower. The adsorption process used temperature variants of 30 ° C, 40 ° C and 50 ° C with a particle size of 250 microns (60 mesh). From the results of the experiment, it could be concluded that the brackish water adoption using zeolite both activated and non-activated could reduce salinity and Cl-levels. Activated zeolite can reduce Cl-levels higher than non-activated one. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3611 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G6 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3611/2732 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3612 2023-05-13T06:56:28Z kejuangan:ART

Ekstraksi Minyak Atsiri Biji Kapulaga Menggunakan Bantuan Microwave sebagai Pemanas Reko, Patricio Stevano Ray Sari, Fergita Nur Indah Wulandari, Yustia Yanuarita, Dian Cardamom extraction essential oil heater microwave Cardamon (Amomum Cardamomum) is one of plantations yielding essential oil. It is commonly recognized as a cooking spice and contains terpineol, sineol, borneol, and camphor that are powerful to dilute sputum and liquid excretion from stomach, warming body, cleaning blood, releasing pain, scenting and generating aroma. The research was to identify the chemical compositions contained in Cardamom seed essential oil by extracting the Cardamon seeds using a microwave as a heater and find essential solutions to the yielded Cardamom essential oil. The solution used was ethanol 96% and n-hexane. The extraction process adopted a microwave with 380-Watt power, and extraction time for 30 minutes, 60 minutes and 90 minutes. The best solutions were ethanol 96% yielding 6.76% with extraction time for 90 minutes and n- hexane yielding 5.44% with extraction time for 30 minutes. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3612 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G10 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G10 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3612/2733 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3613 2023-05-13T06:56:28Z kejuangan:ART

Ekstraksi Kopi Robusta Menggunakan Pelarut Heksana dan Etanol Firyanto, Rudi Mulyaningsih, MF Sri coffee oil extraction quality standard This study aims to determine the optimum conditions that can be used in the process of extracting coffee oil by extracting Robusta coffee using hexane and ethanol solvents, knowing the effect of the amount of solvent and extraction time on the amount of coffee oil produced and producing coffee oil that has a density, refractive index and acid numbers in accordance with the standard requirements for coffee oil quality. The research method used is the response surface method (RSM), using a central composite design with two independent variables namely the extraction time (x1) and the amount of solvent volume (x2). The results showed that the optimum point was obtained with an extraction time of 3 hours and the amount of hexane solvent 600 ml. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3613 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G11 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G11 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3613/2734 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3616 2023-05-13T06:56:28Z kejuangan:ART

Kajian Kehilangan Tekanan dan Temperatur pada Fluida Dua Fasa Lapangan Panas Bumi Dieng Pramudiohadi, Eko Widi EA, M. Th. Kristiati pressure loss temperature loss two-phase pipe single-phase steam pipe The Dieng Geothermal Field is one of the geothermal fields in Indonesia which is managed by P.T GEODIPA ENERGI, with a power generated by 60 Mwe. The researcher tried to calculate the  pressure loss obtained from the Begg and Brill equations and the temperature loss from the law of energy conservation equations, by using two-dimensional mathematical manipulation from Newton Rapson, obtained a simultaneous decrease in pressure and temperature from a particular pipe segment. At Dieng Field, two-phase pipes use 18 – 24” diameters, all pipes are coated with 7.5 cm thick polyurethene insulation, pressure drops range from 1.78 to 8.2 barg and temperature drops between 0 – 1 ºC. The distance of the separator to the turbine varies from the farthest distance is 9677 m until the closest distance is 5341 m, with the smallest diameter of 0.6096 m and the largest diameter of 0.9144 m, the thickness of the steam pipe insulation is 7.5 cm with the type of carbonate. At turbine inlet, the pressure drop that occurs ranges from 2-2.20 barg and temperature drop between 9.87-10.87 ºC, steam mass of 88.86 kg with a turbine pressure of 9.8 barg and turbine inlet temperature of 177.126 ºC. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3616 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; B2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; B2 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3616/2735 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3617 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Pelarut Terhadap Persentase Kopolimerisasi Cangkok Asam Akrilat pada Khitin dengan Metode Iradiasi Rekso, Gatot Trimulyadi Rahmawati, Rahmawati copolymerization grafting irradiation chitin The effect of solvent on the percentage of graft copolymerization of acrylic acid onto chitin by irradiation method has been carried out. The research aims to find out the optimum solvent composition to the increased swelling properties of chitin so that acrylic acid could carry in the active site of chitin. In this experiment, the trapped radical and peroxide graft copolymerization radiation method were employed. The influence of solvent compositions e.g., water-methanol, water-acetic acid, and methanol-acetic acid, and the grafting method that affected the degree of grafting have been studied. The result showed that the percentage of grafted chitin by pre-irradiation peroxide method is higher than the trapped radical method. The methanol-acetic acid in the composition of 7/3 was the best solvent for grafting of chitin, with the percentage of grafting was found 47.2 %. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3617 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; B3 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; B3 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3617/2736 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3618 2023-05-13T06:56:28Z kejuangan:ART

Coal Gasification and Coal Microscopic Characteristics in Tanjung Baru, Lahat Regency, South Sumatera Rahmad, Basuki Raharjo, Sugeng Ediyanto, Ediyanto Putra, Gerhana Prasetya coal macerals gasification synthesis gas CO H2 CH4 CO2 N2 The location of research is located in the Tanjung Baru Area, Lahat Regency, South Sumatera. The Geological setting of the Tanjung Baru Area in the South Sumatra Basin is included in the Muara Enim Formation the age is Middle Miocene to Late Miocene. Coal in the Tanjung Baru Area, has a calorific value of 5089-5321 Kcal / kg and is rank High in Bituminous Volatile C-High Volatile Bituminous B according to the ASTM classification. Average quality (proximate test) of Muara Enim Formation coal: total sulphur 0.36-1.49% (adb); 1.28-2,5% ash (adb); inherent moisture 9-11% (adb); volatile matter 38.7-42.4% (adb); fixed carbon 45.5-47.9% (adb), total moisture 28.1-28.8% (Ar); relative density 1.28. Coal Charactersitics of Coal Tanjung Baru  the macerals average are vitrinite (92,4% vol.); liptinite (2.9% vol.); inertinite (5,7% vol.). Each macerals or group macerals has different physical and chemical properties. The variation of composition microscopy showed the changes of plant communities or coal facies leading to varies of coal quality, with a average vitrinite reflectance value 0.47-0.58, generally the coal rank is subbituminous-bituminous. Coal gasification is the process of converting coal into synthesis gas. One of the gas produced is a flammable methane gas. Gasification is raw fuel, in this case coal is partially oxidized to produce a product called combustible gas. The main product from the gasification product is synthesis gas or syngas, consisting of Carbon Monoxide (CO), Hydrogen (H2), Methane (CH4), Carbon Dioxide (CO2) and Nitrogen (N2). Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3618 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; B5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; B5 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3618/2737 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3619 2023-05-13T06:56:28Z kejuangan:ART

Intensifikasi Proses dalam Sistem Reaksi dan Pemisahan Dinamik Budhi, Yogi Wibisono converter dynamic membrane reactor reverse flow Process Intensification (PI) presents a set of often substantially innovative and creative methods in process equipment design and operation method, which could bring considerable benefits in term of process performance. The process intensification in principle is a paradigm shift of thinking when compared to traditional processes. Transient reactors and separations are receiving increased attention due to its capability to influence the temperature and concentration profiles inside the fixed bed as well as main product recovery, leading to the possibility for improvement of conversion, selectivity, and recovery. The application of the transient fixed bed and membrane reactors is also gaining broad interest as an efficient method for energy saving, lower light-off temperature, and higher recovery. This technology may be considered as an alternative to various catalytic reactions in which heat storage and catalytic coverage can be manipulated for the process improvement. In this paper, possible operations and methods of fixed bed catalytic reactor and membrane operation are presented. Examples are given here for modulation of feed gas in catalytic converter and membrane, and application of reverse flow reactor. Overall, the process intensification opens a new way for improvement of process performance when proper design and operation can be developed. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3619 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; B6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; B6 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3619/2738 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3621 2023-05-13T06:56:28Z kejuangan:ART

Analisis Kegagalan Hasil Uji Produk Pelek Aluminium Berdasarkan SNI 1896 : 2008 Ihlas, Apriardi Yahya, Najmuddin aluminium wheel rim intermetallic phase needle structure The aluminium wheel rim product is one of the mandatory SNI products. The wheel rim product is directly related to the safety of the wearers. Some domestic industries have failed to meet the requirements of the SNI 1896: 2008, especially in testing the resistance for impact loads. The purpose of this research was to discover the causes of that failure. Several methods were carried out to find out the causes, namely the metallographic examination, the Scanning    Electron Microscopy/Energy   Dispersive   X-Ray   Spectroscopy (SEM/EDS), and the chemical composition. All data would be compared with Original Equipment Manufacturer (OEM) products. The results of the research proved that the too-high Fe content would form a needle structure which had a low interface bond to the aluminium matrix. This condition simplified the spreading of cracks. Based on the results of the chemical composition test and the Al-Si-Fe phase diagram, the intermetallic phase formed was β-AlFeSi, presumably. Also, two types of defect were found, interdendritic shrinkage and less gas porosity with the uneven distribution. The sharp form of the shrinkage defect and β-AlFeSi phase caused the stress concentration would become the initial crack. Consequently, all these conditions caused the low durability of the wheel rim product for the impact loads Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3621 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; B7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; B7 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3621/2739 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3622 2023-05-13T06:56:28Z kejuangan:ART

Pirolisis Limbah Pangkal Bambu Betung (Dendrocalamus asper) Widayati, Tunjung Wahyu Jaya, Danang Danujatmiko, Anantyto Trimulyo, Bagus Drajat betung bamboo pyrolysis tar inert Bamboo is one type of grass which is part of non-timber forest products. The chemical properties of bamboo contain of cellulose, lignin, pentosan, ash, and silica. This study using waste of betung bamboo base.  To make tar from betung bamboo it is necessary to go through a pyrolysis process. Pyrolysis is a process of thermal decomposition carried out in an inert condition. In this study using the fast pyrolysis method where the main product is tar while charcoal and non-condensable gas are by product. Tar start producing at low temperature and ended at temperature above 600°C because of secondary reaction mechanism that cause tar start to decompose to gas and charcoal. This study using 500°C to 900°C with, 1 hour and 3 hours temperature process condition. The optimum mass result of tar reached at 1 hour 600°C is 19.2420 gram while at 3 hours 600°C is 13.1972 gram. Based on this research, it can be concluded that lower temperature process produced more tar and higher temperature process decrease mass of tar produced, in this case the optimum temperature for betung bamboo pyrolysis reached at 600°C. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3622 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; B8 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; B8 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3622/2740 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3623 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Konsentrasi KOH dan Suhu terhadap Adsorpsi Cu pada Limbah Cair Batik dengan Adsorben Bonggol Jagung Wakid, Rifai Nur Prasetyo, Rochmat Hari Mulyaningtyas, Akida corncobs adsorbent copper batik dye waterwaste atomic absorption spectrophotometer In Indonesia, corn is one of the staple foods with a high demand. However, corncobs are still considered as waste with very limited exploitation. This study aims to utilize corncobs as an adsorbent of copper (Cu) in batik dye wastewater which should not more be 2 mg/L when discharged into the enviroment. The analytical method to determine copper concentration was the Atomic Absorption Spectrophotometer (AAS). This research began with the production of corncobs as adsorbent in a furnace at the 350°C for 2 hours. The adsorbent was activated by KOH at various concentrations and was wet destructed by 65% HNO3. The result showed that the highest copper concentration in batik waterwaste was 23.306 ppm at 50°C while the lowest was 4.105 ppm at 75°C. According to KOH concentration, result showed that the highest copper concentration was 10.417 ppm at KOH 0.5 N and the lowest  was 0,529 at KOH 2 N. Based on the mathematical analysis this adsorption follows the isotherm model suitable for Cu adsorption is the Freundlich model. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3623 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I4 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I4 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3623/2741 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3624 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh pH Umpan dan Rasio COD/H2O2 terhadap Penurunan COD pada Limbah Cair Rumah Sakit Melalui Metode Fenton Setiawan, Oki Sarto, Sarto Cahyono, Rochim Bakti advanced oxidation process Fenton reaction hospital wastewater chemical oxygen demand Hospital wastewater is accumulative wastewater originating from hospital activities, both medical and non-medical. This hospital wastewater has a high enough COD level of 580.65 ppm so it needs to be treated so as not to pollute the environment because the hospital wastewater quality standard that can be discharged is 80 ppm. The Fenton reaction is one of the advanced oxidation processes (AOP) methods that have been widely applied for the treatment of wastewater containing organic pollutants and contaminants. This method utilizes hydroxyl radicals (OH*) produced from the reaction of H2O2 with the catalyst Fe2+ or Fe3+. Hospital wastewater treatment is carried out to determine the ability of the method of Fenton in reducing levels of Chemical Oxygen Demand (COD) and determining conditions. optimum for hospital wastewater treatment using the Fenton method. The parameters that are considered to affect the Fenton process are the COD / H2O2 ratio, and pH. From the results of the research conducted showed that the optimum conditions in this Fenton process are at pH 3 and the COD / H2O2 ratio is 10 (g / g) where the reduction in efficiency decreases in COD levels to 55.07%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3624 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3624/2742 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3625 2023-05-13T06:56:28Z kejuangan:ART

Pembuatan Kitosan dari Limbah Cangkang Kepiting untuk Mengolah Limbah Cair Tahu Vebriyanti, Ella Soviana Irfan, Muhammad Siswanti, Siswanti Crab shell Chitosan COD Metal Fe Wastewater The production of tofu waste industry still contain high content of chemical oxygen demand (COD) and metal Fe as well as its acidity, so it is assessed can pollute the environment. There are various processes to overcome this, one of which is the addition of coagulants. In this study used chitosan to lower COD levels, metal Fe and increase the pH value. The research was conducted in 3 phases: (i) making chitosan from the waste shell of the crab by deproteination with concentration NaOH 2,28 ; 2,7 ; 3,25 ; 3,75 ; 4,36 N then in demineralization with concentration HCl 0,5 ; 1 ; 1,5 and 2 N. Then in deacetylation with NaOH 50% and analysis kjeldahl method, ash content, and FTIR to determine the quality of chitosan (ii)Mixing chitosan and Al2(SO4)3 in Tofu wastewater (iii) test COD, Metal Fe, and pH in Tofu wastewater. The final parameter observed is COD, Metal Fe and pH. The results of the study obtained COD reduction value up to 25,421% and the decrease in the metal content of FE up to 23,23%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3625 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I2 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3625/2743 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3626 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Suhu dan pH Elektrokoagulasi Terhadap Penurunan Kadar TSS dan COD pada Limbah Cair Laundry Yudhistira, Abdul Malik Mujiburohman, Muhammad Electrocoagulation Laundry waste TSS COD The liquid waste of laundry is known to contain various contaminants. This study investigated the treatment of the liquid waste of laundry using electrocoagulation, with temperature and pH variation. The electrodes used were a pair of aluminum, to produce ion Al3+ reacting with ion OH– from the water, to form coagulant Al(OH)3. The temperature was varied at 30ºC, 50ºC, and 70ºC; while the pH was varied at 5 and 9. The quality of waste was measured from the level of total suspended solid (TSS) and chemical oxygen demand (COD). Within the range of studied parameters, the optimum conditions were obtained at temperature of 30-50oC and pH of 5, with the efficiency of decrease of TSS level and COD level of 39.71% and 58.35%, respectively. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3626 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I5 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3626/2744 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3627 2023-05-13T06:56:28Z kejuangan:ART

Pembuatan Bahan Bakar Minyak (BBM) dari Sampah Plastik Menggunakan Proses Pirolisis Sugiarto, Bambang Arfianto, Joshua Rio Monika, Kris pyrolysis PolyPropylene High Density Polyethylene density heating value. Pyrolysis of plastic waste is a thermochemical decomposition process of organic material in plastics with a heating process using little or no oxygen. This research does to determine the effect of the type of plastic waste on the amount of pyrolysis oil. The pyrolysis of plastic waste is carried out using PolyPropylene (PP) plastic seed feed and High Density Polyethylene (HDPE) plastic waste. Variable pyrolysis reactor feed that is as much as 500 grams - 2500 grams for each type of plastic. In this study using a reactor made of stainless steel with a maximum capacity of 3000 grams. The heat source used to heat the reactor is biomass pellets made from 100% wood. The pyrolysis oil produced from Polypropylene seeds is 72%, while the pyrolysis oil produced from High Density Polyethylene plastic waste is 31%. The yield difference is quite high due to the plastic seeds having a higher level of purity compared to plastic waste. The resulting pyrolysis oil density results close to the density value of Pertamax fuel. The heating value of pyrolysis oil is close to the heating value of kerosene. The flash point value of pyrolysis oil is included in the kerosene flash point value. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3627 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I6 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3627/2745 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3628 2023-05-13T06:56:28Z kejuangan:ART

Kajian Pembuatan Briket Bioarang dari Sampah Kiriman Pantai Teluk Penyu, Cilacap Nugroho, Aldino Tri Wicaksono, Tetuko Ari Kurniasih, Febri Satriawan, Dodi bio-charcoal briquette waste of “Teluk Penyu” beach organic waste Cilacap is one of the regencies in Central Java that has tourism potential in the form of “Teluk Penyu” Beach. The location of the beach which is close to Ocean causes this beach to have large sea waves that carries piles of garbage from the sea. This garbage is in the form of organic waste that always comes every day and continues to grow with time. The potential of this waste has resulted in the accumulation of waste on the coast and the need for a solution to overcome this problem. The solution given is processing waste into environmentally friendly bio-charcoal briquettes. Coastal waste is crushed first and then dried. Pyrolysis process is needed to increase the calorific value in waste with various temperatures (300, 400, and 500 0C) and operating times (1,5; 2,5; and 3,5 hours). After that, proceed with the pressing process with a cylinder size of 3 x 10 cm with the addition of tapioca flour for gluing. The quality of environmentally friendly fuel bio-charcoal briquettes is determined from water content, ash content, and heating value determined by SNI 01-6235-2000. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3628 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I8 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I8 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3628/2746 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3629 2023-05-13T06:56:28Z kejuangan:ART

Efisiensi Penurunan Kadar Logam Cu pada Limbah Cair Industri Elektroplating dengan Proses Elektrokoagulasi Wati, Ririn Sanggar Erawati, Emi electroplating electrocoagulation copper Liquid waste in the electroplating industry contains heavy metals such as nickel, copper and zinc. If the waste is discharged directly to the environment without any prior treatment it will cause damage to humans and the environment. One method that can be used to treat this wastewater is electrocoagulation. Where electrocoagulation is an electrolysis process that requires electric power, electrical conductors and electrodes. The purpose of this research is to determine the efficiency of reducing the concentration of Cu in the variation voltage and stirring speed on the electrocoagulation processes. First and second order reaction rate constant have been evaluated. Eighty mL of electroplating waste is added to reactor, stirred  using magnetic stirer in the variation of voltage (12,14,16 V) and in the variation speed (200, 300, 400) rpm. Every 40 minutes samples were analyzed using AAS. Electrocoagulation processes were stopped in 160 minutes. The results showed the highest efficiency in the variation of voltage and string speed are 95.92% and 96.81 % in that order. First order reaction rate constant in the variation stirring speed and voltage are 0,0163 s-1 and 1,8937 s-1 respectively. On the other hand  second order reaction rate constant in the variation stirring speed and voltage are 0,0269 s-1  dan 3,9322 s-1 respectively. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3629 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I10 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I10 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3629/2747 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3630 2023-05-13T06:56:28Z kejuangan:ART

Studi Awal Meningkatkan Nilai Tambah Batubara Halus dengan Gasifikasi Nursanto, Edy Ilcham, Adi Haryono, Gogot coal gassification fluidization upright column In Indonesia, coal is one of the abundant energy sources. During  the process of supplying coal, fine coal accumulated around the belt conveyor in the mining area. The fine coal has no economic value. Normally the fine coal be returned to cover some mining areas to avoid enviromental problem. An idea was suggessted to take benefit from the  fine coal by utilization. In this paper, it will be described the  utilization of fine coal as a synthetic gas or syngas produced from gassification. The fine coal was used in this study came from a coal mining area in South Sumatra. The experiment was carried out using an upright column. Inside the column, coal was placed at a position then air and steam were passed from under the column to fluidize the coal. The results showed that the reactor worked at temperature of 550oC and steam temperature of 300oC, and gas was produced. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3630 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3630/2748 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3631 2023-05-13T06:56:28Z kejuangan:ART

Studi Potensi Pemanfaatan OTEC (Ocean Thermal Energy Conversion) Menggunakan Siklus Terbuka untuk Mengatasi Krisis Listrik dan Air Bersih di Pulau Lembata, Nusa Tenggara Timur Julianto, Cahyadi Electricity OTEC Open Cycle and Lembata Island Based on data from the Center for Marine Geological Research and Development (PPPGL) in 2017, that the potential for Ocean Thermal Energy Conversion (OTEC) in Indonesia is the largest in the world, spread over 17 locations at 41 GW. Nevertheless, there are still regions in Indonesia that lack electricity supply, one of which is Lembata Island in East Nusa Tenggara Province. According to research from the Head of the Kupang Lasiana Climatology Station, sea surface temperature in the northern waters of NTT has a temperature of around 27.5-29.5oC with sea temperatures at depths of 200-1000 meters at 4-5oC. Making it suitable for developing OTEC power plants with an open cycle. The calculation result of OTEC power generation potential is 2500 kW. Work produced by turbine is 96 Kj/Kg, turbine cycle efficiency is 3.09%, turbine power is 2838.95 Kw, evaporator capacity is 9172.98 Kg/s, condenser capacity is 93018.25 Kj/Kg, pump power vacuum of 291.01 kW. In addition to the electricity produced, the OTEC power plant can also produce fresh water. The fresh water is produced from an open cycle process so that it can be utilized by local residents. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3631 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J7 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3631/2749 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3632 2023-05-13T06:56:28Z kejuangan:ART

Pemanfaatan Pelepah Kelapa Sawit menjadi Bioetanol dengan Variabel Konsentrasi H2SO4 dan Waktu Fermentasi Ahmad, Adrianto Amri, Idral Nabilah, Rahmah bioethanol fermentation hydrolysis palm fronds saccharomyces cerevisiae Scarcity of fuel oil (BBM) makes a lot of research leading to the search for alternative fuels that come from renewable natural resources. One of the raw materials that has the potential to be converted into bioethanol is oil palm midreb. The research aims to determine the effect of H2SO4 concentration on the hydrolysis process to produce glucose and to determine the optimum time of bioethanol production. Then hydrolysis process with variaitions of H2SO4 that is 1.5M, 2M, and 2.5M for 3 hours at temperature 100°C and continued with the fermentation process  to produce bioethanol with a fermentation time is 24 hours, 48 hours, 72 hours, 96 hours, and 120 hours. The results showed that the hydrolysis process  maximum sugar concentration of 161.98 gr / L is produced. The best concentration of H2SO4 in this research is 2 M and the best fermentation time is 96 hours with bioethanol levels obtained at 7% or 55.25 g / L. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3632 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J9 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J9 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3632/2750 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3633 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Konsentrasi Asam Klorida (HCl) Pada Hidrolisis dan Waktu Fermentasi Terhadap Limbah Padat Sagu Menjadi Bioetanol Ahmad, Adrianto Muria, Sri Rezeki Rahani, Rahani bioethanol fermentation hydrolysis sago solid waste saccharomyces cerevisiae Bioethanol is a bioenergy that can be used as an alternative fuel. One of the raw materials that can be utilized is sago solid waste. Sago pulp biomass, which is a lignocellulose material, contains considerable potential as a basis for bioethanol based on the availability of certain components (starch and cellulose) it contains. Cellulose content found in sago solid waste can be converted into bioethanol through hydrolysis and fermentation processes. This study aims to synthesize bioethanol from sago solid waste, determine the effect of HCl concentrations on the hydrolysis process and determine the optimum time of bioethanol production from sago pulp waste by the method of separate hydrolysis and fermentation (SHF). The research began with pretreatment of sago pulp using 1M NaOH, then the hydrolysis process used HCl with a variation of 1 M, 2 M and 3 M at 100oC for 3 hours. Then the hydrolysis results are fermented using Saccharomyces cerevisiae. The fermentation process lasts for 24 hours, 48 hours, 72 hours, 96 hours and 120 hours. The results showed that the largest sugar concentration obtained at the 2 M HCl hydrolysis was 140.18 gr / L and the best bioethanol content was obtained from fermentation for 96 hours is 7% or 55.25 gr / L. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3633 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J10 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J10 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3633/2751 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3634 2023-05-13T06:56:28Z kejuangan:ART

Pengaruh Variasi Perekat pada Briket Berbahan Limbah Tempurung Kelapa Herjunata, Ricky Noviandini, Shafira Ratna Kholisoh, Siti Diyar adhesive bio-briquette coconut shell renewable energy World’s energy demand increasingly grows along the time, especially energy source from fossil fuels. Unfortunately, these fuels generate more GHG (greenhouse gas) emission, which leading to the global warming. Nowadays it encourages the development of some alternative renewable energy, such as biomass. The abundant waste of coconut shell in Indonesia can be utilized as biomass briquettes (bio-briquettes). An adhesive, such as starch, pine resin, or clay, has an important role while producing these briquettes. This research was aimed to study the effect of some kinds of adhesives on briquettes. This laboratory work was conducted by mixing the pyrolyzed coconut shell waste powder with a certain adhesive composition. Afterwards, the mixture was molded into briquettes and dried. Briquettes’ quality was therefore analyzed through their content of moisture, volatile matter, ash, bound carbon, and the heating value. Adhesives used for making briquettes comprised starch (5%, 10%, 15%), pine resin (40%, 45%, 50%), and clay (40%, 45%, 50%). Briquette on 5%-starch composition showed the relatively best characteristics with the content of moisture, volatile matter, ash, bound carbon, and calorific value of 6.74%, 11.78%, 2.94%, 78.52%, and 7027.40 cal/g, respectively. This result was subsequently compared to Indonesia’s national standards (SNI), as well. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3634 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J11 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J11 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3634/2752 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3636 2023-05-13T06:56:28Z kejuangan:ART

Bioethanol Production Using Green Algae (Chaetomorpha) As Renewable Energy Soeprijanto, Soeprijanto Widodo, Fajar Arif Istiqfarin, Istiqfarin Anindya, Nabila Fara Mudyawati, Putri Selly Amylase bioethanol glucoamylase algae reducing sugar saccharification Biologically, green algae (Chaetomorpha) are a group of chlorophyll plants consisting of one or many cells and in the form of a colony. The main organic materials contain in algae for example polysaccharides, vitamins, and minerals. So far the use of algae as an industrial raw material is still relatively small. Though the chemical components containing in algae are very useful for raw materials for bioenergy. The green algae have a potential as raw material in bioethanol (C2H5OH) production as one of the alternatives and renewable energy. The purpose of these experiments was to determine the effect of a variety of concentrations of green algae on reducing sugar and bioethanol production through liquefaction, saccharification, and fermentation. Green algae flour was obtained by drying in an oven at 60°C for 24 h, then was ground. The reducing sugar was obtained by two steps, i.e., liquefaction and saccharification. In liquefaction, the algae flour was put in an Erlenmeyer 2000 ml and added by 40 mg/l CaCl2, α-amylase, and water until the slurry volume was achieved 2000 ml, then heated at 90°C-100°C for 2 h. The next step was for saccharification, in this step HCl was added in the solution to achieve a pH of 4, and glucoamylase was added, then was heated at 60°C for 4 h. The final stage was fermentation, this solution was then added with urea, NPK, and yeast, then incubated for 72 h. After fermentation, the liquid was distilled to obtain bioethanol. The results showed that the addition of enzymes with a concentration of 2% yielded reducing sugar of 64.62, 34.38, 8.46, and 1.14 g/l, with green algal concentrations of 10, 30, and 40% (w/v), respectively. The bioethanol obtained was 0, 0.81, 2.92, and 5.29%, with reducing sugar of 64.62, 34.38, 8.46, and 1.14 g/l for 0, 24, 48, and 72 h, respectively. However, the addition of enzymes with a concentration of 5% produced reducing sugar of 122.22, 55.32, 10.23, and 1.3 g/l, respectively. The bioethanol obtained was 0, 0.92, 3.71, and 8.16% for 0, 24, 48, and 72 h, respectively.  It concluded that the maximum bioethanol obtained was 8.16 % at algae concentration of 40% (w/v) for 72 h of fermentation. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3636 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; F6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; F6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3636/2753 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3637 2023-05-13T06:56:28Z kejuangan:ART

Pemantau Tegangan Baterai Ion Litium dalam Rangkaian Empat Seri pada Aplikasi Penyimpan Energi Berdaya Tinggi Yahya, Najmuddin Ihlas, Apriardi battery lithium series voltage monitor Lithium-ion Battery has been widely used in electronic devices as an electrical energy storage. Not only in portable electronic devices, but also in renewable energy generator such as solar cells. In high-power electronic application devices, it is necessary to have a series or parallel battery cells which connected to a battery pack. Previously, the results of the battery voltage only displayed the total voltage of the battery pack, which caused the individual voltage of each cell was unreadable, especially in a series circuit. Battery Cell voltage on it needed further observation, so we could find the performance out of the BMS in battery protecting. This research conducted in an electronic circuit to monitor the battery voltage in an arrangement of four series. Electronic circuit design was simulated using Proteus Software. The result of it used a combination of Buffer Op-Amp and Differential Op-Amp could read individual cell voltages. Then, the electronic circuit arranged on a breadboard to get the actual results. The actual assembly shows the voltage reading results do not match with the voltmeter reading. Since the prototyping circuit on the breadboard is not permanent, it affects the reading results. Further discussion is shown in this paper. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3637 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J2 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3637/2754 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3638 2023-05-13T06:56:28Z kejuangan:ART

Karateristik Membran sPEEK-PVA- Cs-Asam Fosfotungstat untuk Sel Bahan Bakar Metanol Sara, Alisa Mutia Hidayati, Nur DMFC sPEEK PVA Cs-phosphotungsic acid Direct methanol fuel cells are the electrochemical conversion devices that convert chemical energy from methanol directly into electrical energy. The performance of methanol fuel cells, one of which is determined by the performance of the electrolyte membrane as a transport medium for protons and separators between the anode and cathode. Sulfonated polyethers ether ketone (sPEEK) has good mechanical, thermal and chemical stability and good proton conductivity properties. The combination of sPEEK and polyvinyl alcohol (PVA) showed a high methanol resistance. The addition of filling material of cesium-phosphotungstic acid into the sPEEK-PVA membrane aims to improve the membrane's performance. The membrane characterization on water uptake, swelling degree, ion exchange capacity and methanol permeability carried out by varying the amount of Cs-phosphotungtic acid in the sPEEK-PVA was studied membrane. The results show the value of water uptake in the range 33.3-70.9%, swelling degree in the range 7.5-10.5%, ion exchange capacity of 0.552-0.700 meqg-1 and permeability of methanol in the range 3.50-4,33x10-6 cm2/s. These results indicate that the sPEEK-Chitosan-Cs-phosphotungstic acid composite is a potential membrane as a proton exchange medium in fuel cells although further testing is still needed. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3638 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J3 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J3 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3638/2755 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3640 2023-05-13T06:56:28Z kejuangan:ART

Performa PEM Elektrolizer dengan Hotpress Bakti, Alan Pradana Gandis, Luh Gede Sitanggang, Ramli PEM elektrolizer Hotpress Hidrogen. Energy becomes an important component for human survival because almost all activities of human life are highly dependent on the availability of sufficient energy. PEM electrolizer is an alternative to produce hydrogen as a renewable energy source. In this study aims to improve the performance of PEM electrolizer which has been operating for 5750 hours, with the MEA washing method using hot water and then conditioned using a hotpress device with a certain pressure and temperature. The conclusion is that the performance of PEM electrolizer will tend to increase with increasing hotpress pressure and will tend to decrease with increasing hotpress temperature. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3640 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J5 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3640/2757 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3641 2023-05-13T06:56:28Z kejuangan:ART

Pemanfaatan Serat Buah Kelapa Sawit menjadi Bioetanol dengan Variabel Konsentrasi H2SO4 pada Proses Hidrolisis Ahmad, Adrianto Amri, Idral Wani, Wida Sri Bioethanol fermentation hydrolysis palm fruit fiber Bioethanol has been widely used in transportation as a fuel that is increasingly reduced. Palm fruit fiber has a high enough potential to be developed into an alternative energy source, namely bioethanol because of its high lignocellulosic content. The purpose of this study was to determine the composition of sulfuric acid in the hydrolysis process, determine the initial sugar composition of the bioethanol produced, and determine the optimal processing time for the formation of bioethanol in the Hydrolysis and Separate Fermentation (SHF) method. The stages in this study were the hydrolysis of palm fruit  fiber using H2SO4 with variations of 1M, 2M, and 3M for 3 hours at 100 oC. The fermentation process is carried out with variations in time for 24 hours, 48 hours, 72 hours, 96 hours and 120 hours. The results showed that in the hydrolysis process the optimum H2SO4 concentration of 3M produced a sugar concentration of 87.83 gr/L. The fermentation process obtained an optimal fermentation time of 96 hours with a bioethanol concentration of 31.57 g / L. The greater the initial concentration and the longer time fermentation, the more bioethanol is obtained at optimal times Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3641 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; J8 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; J8 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3641/2758 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3642 2023-05-13T06:56:28Z kejuangan:ART

The Use of Durian Peel Wastes for Bioethanol Production Soeprijanto, Soeprijanto A, Ady Prima T, Irene Fransisca AH, M. Ibrahim Wulandari, Inayah bioethanol durian peel fermentation liquefaction saccharification. Durian peel (Durio zibethinus Murr) is one of most agricultural residues that have a percentage of approximately 60-75% and inner durian peel (soft layer) contains 11.78% starch that can be used as raw material for ethanol production. This study aimed to determine the effect of durian peel concentration on bioethanol production and the fermentation time required for bioethanol yield. Bioethanol production was carried out in a batch reactor. Two steps of liquefaction and saccharification were carried out to obtain reducing sugar. In liquefaction, 200 g durian peel flour and α-amylase were mixed with water in an Erlenmeyer 2 litter then was heated at 90°C for 2 hours. In saccharification, this mixture was then heated at 60°C for 4 h. The sugar obtained was then fermented by adding yeast as much as 0.2%; urea 0.5%; KH2PO5 0.5% of the amount of reducing sugar obtained. Bioethanol was obtained by fractionation distillation of the fermentation at 78°C. The results showed that in the saccharification using flour with a concentration of 10, 20, 30, and 40% (w/v) produced reducing sugar of 22.23, 44.25, 55.45, and 84.61 g/l, respectively. Bioethanol in the fermentation process was 1.9, 3.6, 5.2, and 7.3%, respectively. It concluded that maximum bioethanol was obtained approximately 7.3% with the reducing sugar used at 84.615 g/l during 4 d fermentation. The bioethanol content obtained was 95% after fractionation distillation. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3642 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; F5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; F5 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3642/2759 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3643 2023-05-13T06:56:28Z kejuangan:ART

Standards ISO 14001:2015 as The Basis for Green Innovation, Sustainable Development and Competitive Advantage: The Case of State Energy Company PT Pertamina (Persero) Santosa, Agus green innovation ISO 14001 2015 risk management competitive advantage sustainable development The Paris Agreement on climate change (2015) emphasizes among other priorities the importance of environmental innovation, including technical, technological, organizational, which has significant potential to minimize the negative impact of the industry on the environment. In addition, customers, consumers and shareholders increasingly care and demand the same from our activities, our products and the services they consume. They expect companies to comply with environmental standards and demonstrate our commitment to reduce environmental impacts in daily operations. The task of technology modernization and relevant organizations for various sectors of the national economy. Especially important for energy companies (PERTAMINA). The author analyzes new environmental management tools, which were introduced in the ISO 140001: 2015 standard and outlines some recommendations for improvement in the context of PERTAMINA’s conditions. The author also analyzes how to align these requirements with the upcoming transition of energy companies to the best available technology, which is basically a form of increasing technical and technological innovation. To ensure the successful implementation of these innovations, it is necessary to use, in addition to environmental management standards, a mix of environmental policy instruments, including what is referred to as green finance. It may be a challenge, but it is also an opportunity for us to show our environmental responsibility, stand out from the competition and show our existing customers and potential evidence of our commitment. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3643 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; K3 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; K3 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3643/2760 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3644 2023-05-13T06:56:28Z kejuangan:ART

Isolasi Senyawa Flavonoid dari Limbah Kulit Buah Kakao dengan Variabel Mesh Partikel dan Suhu Evaporasi Daniswara, Lintang Mujiburohman, Muhammad flavonoide cocoa skin mesh evaporation temperature maseration extraction The utilization of waste of cocoa skin has not been optimum; the waste is usually left to degrade in the soil. The cocoa skin is known to contain polyphenol and flavonoide. This work investigated the isolation of flavonoide from the waste of cocoa skin using maseration extraction method with a solvent of methanol. The independent variables studied were the particle size of cocoa skin (70, 80 mesh) and the temperature of solvent evaporation (50, 60oC) with a dependent variable of percentage of total isolated flavonoide. The results show that the smaller particle size and the higher temperature of solvent evaporation are, the higher the percentage of total isolated flavonoide. For the particle size of 80 mesh and the temperature of solvent evaporation of 60oC, the percentage of total isolated flavonoid are 1.304% and 1.194%, respectively. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3644 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G7 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3644/2761 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3645 2023-05-13T06:56:28Z kejuangan:ART

Ekstraksi Minyak Biji Pepaya dengan Pelarut n-Heksana Andaka, Ganjar Fajrah, Izhar papaya seeds extraction n-hexane  Seeds from papaya have an oil content of around 32.6%, so it is very interesting to develop methods of taking oil from papaya seeds. Papaya seed oil is a vegetable oil that is used for cooking oil or cosmetic oils with low cholesterol levels. This study aims to determine the effect of solvent volume and extraction time in extracting oil from papaya seeds by extraction method using n-hexane solvent. After extraction is complete, the extraction results are then filtered and then distilled to vaporize the solvent so that the oil is left behind in the distillation flask. From the results of research conducted with a papaya seed weight of 30 g, extraction temperature of 55oC, and a stirring speed of 400 rpm, it was found that the more the volume of the solvent used, the greater the percentage of oil extracted. The optimal amount of solvent volume is 150 mL n-hexane with the percentage of oil taken up 22.67%. For the extraction time variable, the longer the extraction time, the greater the percentage of oil extracted. In this variable the optimal conditions are obtained at the time of extraction 90 minutes with the percentage of oil taken by 26%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3645 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G8 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G8 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3645/2762 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3646 2023-05-13T06:56:28Z kejuangan:ART

The Removal of Cu (II) and Pb (II) on Wastewater using Microbial Fuel Cells (MFCs) with Graphite/Chitosan Electrode Satriyatama, Adhi Damaranti, Nadia Winda heavy metal MFC biosorption graphite/chitosan electrodes Heavy metal contamination in water has become a major problem in the environment as a result of very rapid industrial development. The presence of heavy metal contamination is becoming toxic, carcinogenic, and able to harm living organisms in ecosystem. Various methods have been applied for reducing heavy metals in water with high efficiency results, but most of them are still require complicated equipment and procedure. Microbial Fuel Cell (MFC) is a new technology for reducing heavy metals using biosorption activity of microorganisms. This study aimed at analyze the concentrations reduction of Cu (II) and Pb (II) using MFC on river sediments and sludge substrate. At the initial stages, graphite/chitosan electrodes were prepared and characterized. Subsequently, the exoelectrogenic microorganisms in the substrate were identified by the Gram staining method and biochemical tests. The processes were carried out in MFC dual chamber reactor with open circuit system for 120 hours. Heavy metal concentrations were analyzed using Atomic Absorption Spectrometry (AAS) periodically at wavelengths 250 nm (Cu) and 283 nm (Pb). COD (Chemical Oxygen Demand) removal, power density, DO (Dissolved Oxygen), and pH were also analyzed. The concentration of Cu (II) metal experienced the biggest decrease in wetland mud substrate that was 75%, followed by Pb (II) which was 45%. Whereas on the river sediment substrate, the concentration of Pb (II) experienced the largest decrease of 81%, followed by Cu (II) of 67%. In addition, measurements of power density values on both substrates were tend to be fluctuated. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3646 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; I11 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; I11 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3646/2763 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3647 2023-05-13T06:56:28Z kejuangan:ART

Sintesis dan Karakteristik Bioplastik dari Tepung Sorghum – Tepung Kanji dengan Penambahan Kitosan dan Plasticizer Gliserol Rosally, Cristya Anggie Sari, Wulan Mahargiani, Titik biodegradable chitosan sorbitol tapioca sorghum. Sorghum is an Indonesia agricultural product which is still rarely used by Indonesia citizen. A lot content of starch that found in a sorghum can be used as raw material for making biodegradable plastic which is interesting solutions as a innovative food wrapper. Starch from sorghum were chosen because they can be degraded well, and eatable. Biodegradable plastic prepared by dissolving sorghum starch and tapioca starch with total starch ratio 10g in 100 ml of aquadest at a temperature of 60°C to 70°C then stirred for 20 minutes. Sorghum starch and tapioca starch ratios are 3:7, 4:6, 5:5, 6:4, 7:3. Chitosan variables are 0,5g, 1g, 2g, 2,5g, and 3g, and sorbitol variables are 3ml, 4ml, 5ml, 6ml, and 7ml. The analysis includes tensile strength and percent elongation. Then continued with the biodegradable analysis for 14 days. Good composition for this biodegradable plastic are 10 g starch with sorghum starch and tapioca starch ratio at 5:5, 100 ml acetic acid 1%, , 1,5g chitosan, and 4ml sorbitol with the result of tensile strength is 2,2812 MPa and 43,95 % for percent elongation. Biodegradable plastic could degraded well at day 10. So this biodegradable plastic proved more eco friendly than synthetic plastic. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3647 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; L4 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; L4 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3647/2764 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3648 2023-05-13T06:56:28Z kejuangan:ART

Ekstraksi Ultrasonik Karotenoid pada Kulit Waluh Menggunakan Pelarut Virgin Coconut Oil Nugraheni, Susanti Rina Perwitasari, Perwitasari Anggorowati, Heni pumpkin peel ultrasound extraction virgin coconut oil carotenoid spektrofotometri UV-Vis Waluh or pumpkin or Cucurbita moschata is known as one of carotenoid sources.  Cucurbita moschata is rich in vitamins which are useful for health, furthermore it is dissolved in water, fenolat, flavonoid polysaccharides, mineral salts, and vitamin that is all beneficial to health. The pumpkin peel which is a waste from processing pumpkin fruit, turns out have carotenoids and vitamin A. This research aims to extract carotenoid from pumpkin peel with ultrasound extraction method using virgin coconut oil (VCO) as solvent. Extraction was done using ultrasound cleaner machine at 40 kHz frequency, 100 Watt power and 300C temperature. Dried pumpkin peel powder (40 and 100 mesh) was extracted in different time (30, 60 and 90 minutes) and various in solid to solvent ratio. The filtrate as extraction product was analyzed by using Spectrophotometry UV-Vis at 490 nm wave length. The highest carotenoid concentration was 36.521 ppm that obtained at 60 minutes, 1:10 solid to solvent ratio and 40 mesh of solid size. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3648 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; G9 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; G9 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3648/2765 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3650 2023-05-13T06:56:28Z kejuangan:ART

Study of Single Stage Compressive Test (SST) Laboratory Determination In Soft Formation Rods with Various Compositions Of Silica and Calcite Impurities In High Pressure and Temperature Suhascaryo, Nur Wibowo, Ilham Dary Pratama, Sandika S, Ridwan Hadi single stage compressive test effect of stress overburden pressure Single Stage Compressive Test is a compressive test tool to study the nature of reservoir rock strength by modeling the reservoir rock into laboratory conditions. Measurement results on surface conditions generally have different results from actual conditions in reservoir conditions, therefore, the working principle of this tool considers the principal stress that works on reservoir rocks designed with the addition of silica and calcite impurities and models reservoir conditions in more detail such as high temperature conditions, the presence of pore pressure and the influence of the presence of fluid in the reservoir rock. Such a laboratory model will provide an overview of the magnitude of the effect of stress, both the maximum stress or the minimum stress acting on the reservoir rock and the effect of temperature and the presence of fluid on the nature of the reservoir rock strength. SST is designed by considering reservoir conditions in Indonesia, generally described as the maximum axial pressure (overbourden pressure) reaching 4000 psia and radial pressure which can act as confining pressure (pore pressure) reaching 1500 psia and the maximum temperature reaching 400 oF. This paper will explain in detail about the design of the SST tool and report the results of the synthetic core compressive test using this tool. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3650 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; B10 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; B10 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3650/2766 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3689 2023-05-13T06:56:28Z kejuangan:ART

Penentuan Swelling Factor dan Tekanan Tercampur Minimum untuk Penerapan Injeksi Gas Karbondioksida di Lapangan Minyak Kristanto, Dedy Hariyadi, Hariyadi Wibowo, Wibowo Paradhita, Windyanesha Minimum Miscibility Pressure carbondioxide (CO2) gas injection swelling factor Oil swelling and minimum miscibility pressure (MMP) are two important factors of carbondioxide (CO2) gas displacement mechanism occurred in the reservoir relate to application of CO2 injection in the field to enhance oil recovery. In this paper determination of swelling factor was conducted using PVT cell, where recombined fluid injected and conditionally at the reservoir temperature. While, determination of MMP between crude oil samples with carbondioxide gas conducted using three methods, i.e. empirical equation, correlation methods and laboratory experiment using slimtube. Based on the results of swelling test during injection CO2 gas processes until 46.82% mole, shows that bubble point pressure is increasing gradually from 410 Psig through 2200 Psig, and swelling factor was also increase from 1.0 through 1.442. The results of minimum miscibility pressure based on the empirical equation is 2807 Psig, correlations of Cronquist is 2301 Psig; Yellig & Metcalfe is 2490 Psig; Holm & Josendal is 2750 Psig, otherwise based on the laboratory measurement using slimtube is 2800 Psig. Determination of MMP using Holm & Josendal correlation is more approximate to the result of laboratory analysis. Furthermore, based on the value of fracture pressure of Layer F is 2200 Psig and MMP is 2800 Psig, hence the application of CO2 gas injection in the field only could be conducted as immiscible flooding. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3689 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; A1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; A1 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3689/2777 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3690 2023-05-13T06:56:28Z kejuangan:ART

Cover Prosiding SNTKK 2020 SNTKK 2020, Editor Prosiding Cover Prosiding SNTKK 2020 Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article image/jpeg https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3690 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; 1 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; 1 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3690/2778 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/3705 2023-05-13T06:56:28Z kejuangan:ART

Kata Pengantar dan Daftar Makalah SNTKK 2020, Editor Prosiding Kata Pengantar dan Daftar Makalah Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3705 Seminar Nasional Teknik Kimia "Kejuangan"; 2020: PROSIDING SNTKK 2020; 2 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2020: 2020 : PROSIDING SNTKK 2020; 2 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/3705/2802 Copyright (c) 2020 Seminar Nasional Teknik Kimia Kejuangan

oai:ojs.jurnal.upnyk.ac.id:article/7621 2022-08-15T06:15:48Z kejuangan:ART

oai:ojs.jurnal.upnyk.ac.id:article/7622 2022-08-15T06:15:10Z kejuangan:ART

oai:jurnal.upnyk.ac.id:article/7623 2022-08-15T06:15:10Z kejuangan:ART

Glucoamylase Enzyme Production by Aspergillus niger Fermentation and Cassava Starch as Substrate Murni, Sri Wahyu Glucoamylase enzyme cassava starch Aspergillus niger enzyme activity Glucoamylase enzyme is widely used in many industries. In Indonesia, this enzyme is needed increasingly for recent years and nowadays still imported with expensive cost. To overcome this problem, an alternative cheaper process for enzyme production was developed. It was conducted by an experimental investigation via batch fermentation by Aspergillus niger fungi with cassava starch as substrate. The fermentation broth in a 500-ml flask was incubated and shaken at room temperature and the substrate was varied at different concentrations. For several certain time interval, the broth was sampled and therefore its enzyme activity, dry cell weight, and remaining substrate concentration was analyzed. This research showed that the optimum condition for fermentation was obtained at substrate concentration of 9% and initial pH of 6. At this condition, the fermentation after 7 days produced glucoamylase enzyme with activity of 0.1355 Unit/ml. In addition, this experiment resulted in the kinetics parameters including saturation constant (KS) of 0.287 g/100 ml, maximum growth rate (max) of 4.127day-1, and enzyme-to-substrate productivity (YP/S) of 0.3826 Unit/g starch. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015-04-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/7623 Seminar Nasional Teknik Kimia "Kejuangan"; 2009: Prosiding SNTKK 2009; C15.1-C15.7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2009: Prosiding SNTKK 2009; C15.1-C15.7 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/7623/4602 Copyright (c) 2022 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/7624 2022-08-15T06:22:01Z kejuangan:ART

Polimerisasi Propilena menggunakan Katalisator TiCl4 dan Kokatalis Tri Etil Aluminium Murni, Sri Wahyu polypropylene mileage isotactic Polypropylene is one of the most widely used polymers in our daily lives. The catalyst that used in the polymerization is the kind of coordination complexes catalyst; the name is Ziegler-Natta catalyst. The function of this catalyst is produce high stereoregularity polypropylene is isotactic polypropylene. This catalyst is very expensive; therefore, it is nececarry to determine the optimum mileage (g propylene per mg catalyst). In this research was determined mileage in polymerization of propylene used catalyst TiCl4 and co-catalyst triethyl aluminium (TEAL). Polymerization reaction conducted in the autoclave reactor at 34 bar, the reactor was equiped with temperature and pressure control. Three tousands ml propylene (5 bar) was introduced to the reactor, was followed by the catalyst TiCl4, co-catalyst TEAL, donor CHMMS (cyclo hexyl methyl methoxy sylane) and hydrogen. Reaction was done at certain temperature and time. At reaction finished propylene was weighed, isotactic polypropylene and molecular weight was analyzed. At the optimum condition: 75oC, 2 hours reaction time, catalyst 20,55 mg and hydrogen 6,8 bar (in the 250 ml tube); the result is mileage 72,476 g propylene/mg catalyst. In addition, at temperature range 60-80oC, the molecular weight polypropylene was 170.476 357.189 and isotactic polypropypene was 96-99%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015-04-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/7624 Seminar Nasional Teknik Kimia "Kejuangan"; 2010: Prosiding SNTKK 2010; D12.1-D12.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2010: Prosiding SNTKK 2010; D12.1-D12.6 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/7624/4603 Copyright (c) 2022 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/7625 2022-08-15T06:26:21Z kejuangan:ART

Bio-diesel Production from Kapok Seed Oil Murni, Sri Wahyu Bio-diesel transesterification kapok seed oil Indonesia’s rapid growth of people and industries causes the rising demand of fuel oil. Consequently, the lack of fuel oil availability in the future will become a very serious problem and facing the challenges to find out some alternative resources for producing fuel oil will be a must. Conversionfatty acid to fatty acid methyl ester (FAME) can be used to substitute the diesel oil (bio-diesel). Fatty acid as raw material for production bio-diesel is mainly selected from non-edible oils such as castor oil, nyamplung oil, and kapok seed oil.This research was aimed to find out the optimum conditions for esterification process of kapok seed oil as substrate for producing bio-diesel, including reaction time and the amount of catalyst added, and to study its purification processes. The low content of free fatty acid (FFA) in initial oil (< 5%) caused the bio-diesel production in this research was carried out only by a transesterification process.Bio-diesel was produced with oil-to-methanol molar ratio of 1:6. Kapok seed oil and solution of KOH in methanol were mixed together at 60oC. This reaction was conducted atstirring speed of 800 rpm in a three-neck flask equipped with a condenser. After certain time periods of reaction, bio-diesel produced was sampled, purified, and analyzed. Optimum conditions obtained from these experiments at oil-to-methanol molar ratio of 1:6 and temperature of 60oC were the reaction time of 30 minutes and the amount of catalyst of 1.25% weight of KOH/volume of oil. At this condition, oil conversion of 86.20% was obtained. From the kinetics viewpoint, this reaction was pseudo-first orderwith respect to oil concentration and with the specific rate (k) of 0.0283 min-1. The bio-diesel product met the SNI (Standar Nasional Indonesia) specification, except the carbon content (that is still high enough, i.e. 0.21%) and the free glycerol content (0.05%). Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015-04-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/7625 Seminar Nasional Teknik Kimia "Kejuangan"; 2009: Prosiding SNTKK 2009; F08.1-F08.10 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2009: Prosiding SNTKK 2009; F08.1-F08.10 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/7625/4604 Copyright (c) 2022 Seminar Nasional Teknik Kimia Kejuangan

oai:ojs.jurnal.upnyk.ac.id:article/7750 2022-09-04T23:55:39Z kejuangan:ART

oai:ojs.jurnal.upnyk.ac.id:article/7751 2022-09-05T00:10:11Z kejuangan:ART

oai:ojs.jurnal.upnyk.ac.id:article/7752 2022-09-28T23:19:40Z kejuangan:ART

oai:jurnal.upnyk.ac.id:article/7753 2022-09-05T00:18:02Z kejuangan:ART

Produksi Enzim Selulase dari Aspergillus niger Secara Fermentasi dalam Medium Kultur Padat Produksi Enzim Selulase dari Aspergillus niger Secara Fermentasi dalam Medium Kultur Padat Murni, Sri Wahyu aktivitas enzim fermentasi substrat padat selulosa selulase aktivitas enzim fermentasi substrat padat selulosa selulase Bioethanol made from lignocellulosic biomass is currently being developed. The main obstacle production of bioethanol from lignocellulosic materials is at the stage of the process of hydrolysis of lignocellulosic material to form sugars. Enzymatic hydrolysis using cellulase enzyme is plagued by an expensive price. In the previous studies have been carried out production of Trichoderma reesei cellulase enzymes,in this research conducted using Aspergillus niger by solid substrate fermentation method. Enzyme production studies conducted in two stages in, there were in the aerated Erlenmeyer flask and rotary drum fermenter (RDF). The results showed that the production of cellulase enzymes in the rice straw substrate has resulted in enzyme activity similar to sawdust from the wood sengon. Water content effect on enzyme activity. The best results were obtained on a substrate of rice straw at 60% moisture content and fermentation time of 6 days, the CMC-ase activity of FP-ase was 0.00229 and 0.00095U /ml respectivelly. The best results in sengon sawdust substrate is reached at 70% moisture content and fermentation time of 7 days, obtained CMC-ase and FP-ase activity 0.00257 and 0.00133 U/ml respectivelly. Productivity of the enzyme in the RDF is similar to the Erlenmeyer flask. At RDF, obtained CMC-ase and FP-ase of 0.00243 and 0.00105 U / ml for rice straw substrate, and 0.00224 and 0.00125 U / ml for sengon sawdust substrate. Bioethanol made from lignocellulosic biomass is currently being developed. The main obstacle production of bioethanol from lignocellulosic materials is at the stage of the process of hydrolysis of lignocellulosic material to form sugars. Enzymatic hydrolysis using cellulase enzyme is plagued by an expensive price. In the previous studies have been carried out production of Trichoderma reesei cellulase enzymes,in this research conducted using Aspergillus niger by solid substrate fermentation method. Enzyme production studies conducted in two stages in, there were in the aerated Erlenmeyer flask and rotary drum fermenter (RDF). The results showed that the production of cellulase enzymes in the rice straw substrate has resulted in enzyme activity similar to sawdust from the wood sengon. Water content effect on enzyme activity. The best results were obtained on a substrate of rice straw at 60% moisture content and fermentation time of 6 days, the CMC-ase activity of FP-ase was 0.00229 and 0.00095U /ml respectivelly. The best results in sengon sawdust substrate is reached at 70% moisture content and fermentation time of 7 days, obtained CMC-ase and FP-ase activity 0.00257 and 0.00133 U/ml respectivelly. Productivity of the enzyme in the RDF is similar to the Erlenmeyer flask. At RDF, obtained CMC-ase and FP-ase of 0.00243 and 0.00105 U / ml for rice straw substrate, and 0.00224 and 0.00125 U / ml for sengon sawdust substrate. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2012-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/7753 Seminar Nasional Teknik Kimia "Kejuangan"; 2012: Prosiding SNTKK 2012 (Arsip); 1-7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2012: Prosiding SNTKK 2012 (Arsip); 1-7 ind https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/7753/4683 Copyright (c) 2022 Seminar Nasional Teknik Kimia Kejuangan

oai:jurnal.upnyk.ac.id:article/10272 2024-02-06T06:10:11Z kejuangan:ART

Thermal Stability Test and Formulation of Sodium Lignosulfonate with Isoamyl Alcohol as EOR Surfactant Andriani, Anisa Novi Azis, Muhammad Mufti Purwono, Suryo EOR SLS formulation iso-amyl alcohol thermal stability Sodium lignosulfonate (SLS) is a promising low-cost surfactant that can be prepared from biomass. There has been large interest to utilize SLS as a chemical Enhanced Oil Recovery (EOR) surfactant. For that purpose, SLS is often mixed with other chemicals such as alcohols. The aim of this study was to find the best formulation of mixed-surfactant and to perform its thermal stability. The resulting mixed-surfactant was then characterized with variety of tests: aqueous stability, phase behavior, and IFT values. We found that a mixture that consists of 50 wt.% SLS, 30 wt.% Isoamyl Alcohol, and 20 wt.% of Palm Fatty Acid Distillate (PFAD) soap gave ultralow IFT at 1.864 × 10-3 mN/m. Phase behavior test shows that 1 wt% of mixed-surfactant formed a Winsor Type III. Subsequently, thermal stability test was conducted at 70°C for 90 days. The results showed that the IFT value fluctuates within the range of 10-3 mN/m for the first three weeks. After three weeks, the IFT values tend to increase to 10-2 mN/m until the end of the test. Hence, although ultralow IFT was achieved in the beginning of the test, further study is needed to improve the long-term stability of the present mixed-surfactant Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10272 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A1.1-A1.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A1.1-A1.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10272/5551 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10273 2024-02-06T06:10:11Z kejuangan:ART

Potensi Selulosa Bakteri Sebagai Pembalut Luka Ideal dan Penghantar Obat (Drug Delivery) Liau, Selva Susilowati Hidayat, Muslikhin Sulistyo, Hary Cellulose bacteria carbon source fermentation Acetobacter xylinum The wound healing process requires an environment that can maintain moisture, absorb excess exudate, and is biodegradable. Conventional wound dressings such as cotton, gauze, and bandages cause wound dehydration. Bacterial cellulose derived from the fermentation of coconut water by Acetobacter xylinum bacteria has unique characteristics that have the potential to be an ideal wound dressing because it can provide a moist environment. It also has good mechanical properties, biodegradability, high biocompatibility, and is non-toxic. Bacterial cellulose produces fine fibres forming a thin layer of extracellular polysaccharides. Such fibre makes it possible to bind to the molecules of the drug. This research will study the mechanical properties and efficiency of drug mass transfer from bacterial cellulose membranes with different carbon sources, namely glucose and fructose, with fermentation time variations of 3, 5, and 7 days. The results showed that the characteristic value of the fructose carbon source was superior to that of glucose. The glucose carbon source has a membrane thickness of 0.81; 6,93; 10.61 mm; fructose is 2.80; 8,41; 13.40 mm. The highest absorption capacity, stress, elongation and drug mass efficiency value is obtained by a fructose carbon source with a fermentation time of 7 days, and for absorption capacity obtained at 1.1640 g/g, stress value 105.9 N with elongation 19.90 mm and drug mass efficiency 4.085% Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10273 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A2.1-A2.5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A2.1-A2.5 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10273/5552 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10274 2024-02-06T06:10:11Z kejuangan:ART

Sintesis Biodiesel dari Minyak Jelantah dengan Katalis K2CO3/y-Al2O3 Handayani, Fitriyani Yetti Cahyono, Rochim Bakti Budiman, Arief biodiesel used cooking oil bioethanol K2CO3/y-Al2O3 transesterification Biodiesel is an environmentally friendly alternative fuels. The price of biodiesel is still relatively expensive due to the high price of raw materials. Thus, cheaper raw materials such as used cooking oils can be used. Used cooking oils can be used to produce biodiesel by transesterification reaction using alcohol and catalyst. The effect of temperature on the conversion was studied in this research. The research was carried out in batch at various temperatures of 45, 55 and 65 oC by reacting used cooking oil and bioethanol with catalyst K2CO3/γ-Al2O3. The ratio of used cooking oil and bioethanol is 1:9 and the concentration of catalyst is 3%. The reaction was run for 5, 10, 15, 30, 60, and 120 minutes, then the biodiesel was separated from the catalyst and glycerol. Furthermore, the biodiesel samples were analyzed by GC-MS to determine the alkyl ester content. The result showed that the highest conversion was 86.39% at 65oC. The biodiesel product complies with SNI 7182:2015, with a density of 871.7 kg/m3, kinematic viscosity of 4.82 mm2/s, flash point of 176oC, cloud point of 9oC, copper plate corrosion number 1, acid number 0.39 mg-KOH/g, total glycerol 0.16%, and ester content 98.3%. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10274 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A3.1-A3.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A3.1-A3.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10274/5553 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10275 2024-02-06T06:10:11Z kejuangan:ART

Karakter Lumpur Pemboran Berbahan Dasar Bentonite Lokal Tulungagung dan Boyolali Mengacu Standar API 13A dengan Variasi Additive Polyamine Ilcham, Adi Gardatoga, Obed Rama Irma, Ade Bentonite standar API 13A sifat fisik polyamine KOH Na2CO3 This study examined the feasibility of using locally sourced bentonite as drilling mud, with the aim of reducing the cost of imported drilling mud. Bentonite, a soil type containing a high concentration of smectite or montmorillonite, is widely used in drilling mud. The physical properties of drilling mud made from bentonite from Boyolali and Tulungagung were compared, with the addition of various additives to meet the API 13A standard. The research found that drilling mud made from Boyolali bentonite showed physical properties that were closer to the API 13A standard compared to Tulungagung bentonite. Specifically, adding 7 grams (12%) of polyamine to Boyolali bentonite mud produced a volume of filtrate loss and mud cake thickness closest to the API 13A standard, namely 10.8 ml (maximum 15 ml) and 0.14 cm (maximum 0.28 cm), respectively. Adding 2.3 grams (5.04%) of KOH resulted in the highest pH value of 13, while adding 2.5 grams (1.17%) of Na2CO3 produced the least amount of filtrate loss, namely 7.2 ml (maximum 15 ml), with a mud cake thickness of 0.27 cm (maximum 0.28 cm) Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10275 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A4.1-A4.5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A4.1-A4.5 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10275/5554 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10276 2024-02-06T06:10:11Z kejuangan:ART

Pembuatan Biokompatibel Suture Anchor Berbasis 3D Printing Filament dari Nano Hidroksiapatit Berbahan Dasar Cangkang Keong Sawah Zhafira, Tesa Ulima Berlian, Baskoro David Karisma, Achmad Dwitama 3D Printing Filaments Field Snail Shell Hydroxyapatite Polycrapolactone Suture Anchor Suture anchor is used to attach soft tissues to the bone. One of the materials that can be used for making suture anchors is hydroxyapatite [Ca10(PO4)6(OH)2]. Hydroxyapatite (HAp)  has similarities with the properties of bone minerals, so it has the potential to be used as a material for making biocompatible suture anchors. However, HAp is brittle and has poor strength, so HAp is usually combined with polymers such as composites to overcome the limitations of its mechanical properties. One of the polymers that can be used is Polycaprolactone (PCL). In this study, HAp was synthesized from rice field snail shells, due to its high calcium contents.  Further, the combination of HAp and PCL in the manufacture of 3D printing filaments such as suture anchors was obtained. The variables used in this study were the mixing ratio of HAp:PCL in making filaments with a mixing ratio of 0.5:9.5; 1:9 ; 2:8. The results of various variables shows that the tensile strength most optimal composite in 7,3 % when mixing HAp:PCl is 0.5:9,5. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10276 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A5.1-A5.7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A5.1-A5.7 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10276/5555 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10277 2024-02-06T06:10:11Z kejuangan:ART

Modifikasi Coating Pada Permukaan Implan Ti-6Al-4VELI Berbasis Kombinasi Hidroksiapatit Cangkang Rajungan dan Polycaprolactone Nibras, Adinda Lulyta Naifa Susanti, Ajeng Ramadhan, Haykal Nur Fajri Kamilah, Villia Lidzati Ningrum, Eva Oktavia Ti-6Al-4V ELI Hydroxyapatite Polycaprolactone Dip Coating Ti-6Al-4V ELI (Extra Low Interstitials) is widely used material in orthopedics with its excellent mechanical properties and biocompatibility. However, in application it has a risk of corrosion caused by body fluids exposure as a results in inhibitation of tissue growth. Therefore, in this study modification of the surface of the Ti-6Al-4V ELI implan by coating Hydroxyapatite (HAp) combined with Polycaprolactone (PCL) using the dip coating method was carried out. The effect of HAp/PCL coating on implant morphology is investigated. Moreover, the effects of HAp/PCL concentrations on surface roughness, corrosion rates, and coating thickness are elucidated. The results showed that the hydroxyapatite of crab shells synthesized in a compliance with Food and Drug Association standards, i.e., Ca content of 93.03%. The functional groups confirmed with HAp standard chart JCPDS no. 09-0432 with crystallinity of 88.32%. The post-coated implant showed the coating thickness range of 140-200 µm and roughness average of 120-129 nm. In addition, the corrosion rate showed 0,043-0,33 mmpy which also complied with medical standard. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10277 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A6.1-A6.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A6.1-A6.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10277/5556 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10278 2024-02-06T06:10:11Z kejuangan:ART

Sintesis dan Karakterisasi Nano-Hidroksiapatit dari Cangkang Rajungan Sebagai Material Pembuatan Filament 3D Printing dengan Kombinasi Poly(caprolactone) Wiyono, Deden Eko Siregar, Salma Auliarifkie Ma'mun, Ummu Zahroh Rosanti, Maharani Sugito Ningrum, Eva Oktavia 3D printing filament Crab shell Hydroxyapatite Polycaprolactone An orthopedic anchoring rotator cuff is often used to reattach a torn rotator cuff tendon to the bone.  However, anchoring rotator cuffs commonly use non-biodegradable metals and require a second surgery. Furthermore, manufacturing processes for retaining rotator cuff implants are developed using filament-based 3D printing. So that biodegradable and biocompatible materials are needed as filament materials for making anchoring rotator cuffs, one of which is by mixing poly(caprolactone) (PCL) and hydroxyapatite (HAp). In this research, we will synthesize nano-sized HAp from crab shell waste using the precipitation method. The synthesis results will be reviewed through XRF, FTIR, XRD, and SEM analysis. In addition, the mechanical properties of PCL/HAp composite filaments for tissue scaffolds at variables of 9.5:0.5, 9:1, and 8.5:1.5 were also reviewed. XRF characterization results show that the crab shell has a calcium content of 93.09%. FTIR testing shows the formation of hydroxyapatite functional groups, namely OH- and PO43. XRD test results show conformity with the JCPDS 09-0432 graph with a degree of crystallinity of 88.32%. SEM analysis showed that the HAp produced has a nano size with a particle diameter of about 126.3 nm. In mechanical analysis, the best PCL/HAp filaments were obtained at a mixing ratio of (9:1) Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10278 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A7.1-A7.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A7.1-A7.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10278/5557 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10279 2024-02-06T06:10:11Z kejuangan:ART

Prediksi Kesetimbangan Uap-Cair Sistem Biner 3-Pentanol + Asam Propionat Sebagai Basis Pada Proses Desain Pemurnian Biofuel Bekti, Andi Setyo Paramitha, Pradnya Altway, Saidah Wibowo, Agung Ari Biofuel 3-Pentanol Propionic acid UNIFAC-HOC Vapor-liquid equilibrium The depletion of fossil fuels has led to a turn toward renewable and cleaner diesel fuel. In recent years, research has focused on the development of green energy to replace fossil fuels. 3-Pentanol is the preferred alternative fuel because it has better fuel properties compared to other biofuels. 3-Pentanol, as a propionic acid derivative chemical platform, can be produced from renewable biomass through the lactic acid pathway. Therefore, to obtain 3-Pentanol with high purity, a purification process such as distillation is required. Vapor-liquid equilibrium data and the thermodynamic model parameters are needed as basis for designing a distillation column and optimizing the separation process. The aim of this study is to predict the vapor-liquid equilibria (VLE) of the binary systems of 3-Pentanol + propionic acid at 100 kPa, 200 kPa, and 300 kPa using the UNIFAC model in combination with the Hayden-O’Connell model. The prediction results showed no azeotropes found for the studied systems. This study can also open a scope for the thermodynamic studies of biofuel separation process. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10279 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A8.1-A8.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A8.1-A8.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10279/5558 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10280 2024-02-06T06:10:11Z kejuangan:ART

Demineralisasi Batubara Berkadar Abu Tinggi dengan Leaching Menggunakan Alkali Ikhsana, Mifta Aulia Azis, Muhammad Mufti Purwono, Suryo demineralization leaching ash NaOH The study was comdustred on the demineralization of Jambi coal with high ash content as an effort to improve quality. The coal selected first crushed to -80 + 115 mesh. Demineralization was carried out using leacjing process with NaOH 20, 25, and 30% (%weight). The best parameter was used in subsequent leaching process to determine the effect of temperature of 50, 70, 90oC. The result showed that the percentage of demineralization increased with increasing demineralization reduction 34% Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10280 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A9.1-A9.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A9.1-A9.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10280/5559 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10281 2024-02-06T06:10:11Z kejuangan:ART

Pengawetan Ekstrak Pewarna Alami dari Daun dan Kulit Buah Kakao (Theobroma cacao L.) Agustin, Veni Tri Rahayuningsih, Edia Mindaryani, Aswati biodegradation preservative natural dyes cacao Indonesia has abundant natural resources that are very potential and prospective as raw materials for natural dyes, one of which is the leaves and skins of cocoa pods (Theobroma cacao L.). The purpose of this study is to determine the concentration of preservatives that can effectively inhibit the biodegradation reaction of natural dyes in the extract of leaves and skins of cocoa pods. Extracts of natural dyes that have been centrifuged and preservatives was added, then stored in a closed reactor. The preservatives used are benzoic acid and chitosan. Extraction is carried out for 20 days. Every 2 days, extract was analyzed from the reactor to determine the colorant concentration using gravimetric method. Besides benzoic acid, the same experiments was also carried out on another chitosan dissolved in 2% acetic acid solution. The results showed that the addition of benzoic acid and chitosan dissolved in 2% acetic acid solution can inhibit the biodegradation of leaves and skins of cocoa pods extract. Preservative concentrations of 0.50% benzoic acid and 0.25% chitosan are effective preservatives to inhibit the biodegradation reaction Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10281 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A10.1-A10.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A10.1-A10.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10281/5560 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10283 2024-02-06T06:10:11Z kejuangan:ART

Penentuan Kondisi Operasi Optimum Ekstraksi Pewarna Alami Dari Limbah Serbuk Kayu Ulin (Eusideroxylon zwageri) Menggunakan Response Surface Method Putribarafike, Apriliantina Rahayuningsih, Edia Faridah, Eny Natural dye Extraction Ulin wood sawdust Response Surface Method The use of natural dyes is an alternative to replace synthetic dyes. One of the natural resources in Indonesia that can be used as a natural dye is wood sawdust of Ulin wood. Phytochemical analysis results showed that the extract of Ulin wood sawdust contains tannin compound, as the chemical of these sawdust is potential as a source of natural dyes. This research is to find the optimum condition of natural dye extraction from Ulin wood sawdust.  Variables observed in this research are temperature, the weight ratio of sawdust to the solvent volume, and mixer rotation speed. The extraction process with a third necked flask with a stirrer, condenser, heat mantle, and with water as solvents. Natural dye content on the extract was analyzed by gravimetry. The optimization of operating variables extraction using Response Surface Method (RSM) with Box-Behnken model. The results that the optimum temperature was 90oC, the weight ratio of Ulin wood sawdust to the solvent volume was 0,25 g/mL, and the optimum mixer rotation speed was 250 rpm. In this optimum condition, the natural dye content in the extracts was 1,2054% Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10283 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A11.1-A11.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; A11.1-A11.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10283/5561 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10284 2024-02-06T06:10:11Z kejuangan:ART

Pemodelan Dekomposisi Ammonium Carbamate pada Tekanan Tinggi di Pabrik Urea Sunarya, Rahmat Sediawan, Wahyudi Budi Hidayat, Muslikhin urea synthesis ammonium carbamate decomposition falling film mathematical modelling Urea acts as a nitrogen-based fertilizer to boost crop production and prevent a worldwide hunger crisis. Considering ways to make urea production in existing plants more environmentally friendly, a detailed study has been conducted on the high-pressure stripper, in which the equipment uses intensive energy to decompose ammonium carbamate. The mathematical model was prepared using the two-film theory. The UNIQUAC and Redlich-Kwong equations of state have been used to express nonideality in the NH3-CO2-H2O-urea system under high pressure and temperature circumstances. Due to the lack of transport properties in extreme conditions, the properties were estimated using a theoretical method. The present study obtained the mass-transfer coefficient in dimensionless form  and . Moreover, the heat-transfer coefficient was calculated using the Chilton-Colburn analogy. The proposed model result matches what is expected with the commercial plant data. Furthermore, with less than 5% relative deviations, the model deserves significant consideration for any practical use in high-pressure stripper simulation Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10284 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; B1.1-B1.7 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; B1.1-B1.7 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10284/5562 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10285 2024-02-06T06:10:11Z kejuangan:ART

Overview of BTX (Benzene, Toluene, Xylene) Production from Polyethylene Pyrolysis over Ga and Zn Modified HZSM-5 Catalyst Yanewati, Shafira Hakim Supramono, Dijan BTX polyolefin plastic pyrolysis catalyst overview The increase in Indonesia's BTX chemical production was carried out to keep pace with global demand trends. The raw material for alternative production is household waste in Indonesia, of which 36% is plastic. Polyolefins make up 76% of the composition of household plastic waste. The rapidly developed BTX production process is the depolymerization of polyolefin plastics by pyrolysis and catalyst modification for catalysis. Polyolefin plastic in the form of polyethylene produces the highest aromatic yield and selectivity among other types of plastic in plastic waste. This study compared two scenarios with the highest yield of aromatics using different catalysts as base literature with an additional overview regarding the topic related. The process scenarios being compared are polyethylene pyrolysis over CaO with Ga/ZSM-5 catalyst and Zn-ZSM-5 catalyst. Literature overview obtained the overall BTX production progress over time and the potential of polyethylene catalytic pyrolysis for further study Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10285 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; B2.1-B2.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; B2.1-B2.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10285/5563 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10286 2024-02-06T06:10:11Z kejuangan:ART

CFD Simulation and Efficiency Analysis of Natural Gas Ejector-Booster System Kurniawan, Aditya Nuzuladzmi, Rafida Nariswari Afni, Amanda Lailia Nur natural gas ejector efficiency CFD simulation Natural gas production involving several gas-well streams with different operating pressure creates a problem, especially for lower-pressure streams. Usually, a compressor unit is installed to enable a lower-pressure stream to tie in the higher-pressure stream. However, this solution requires high costs and investment related to compressor operation. Natural gas ejector provides an alternative, where a higher-pressure stream act as the motive fluid to withdraw the lower-pressure stream.  This work aims to simulate the flow inside the ejector using ANSYS Fluent CFD simulator. The model used is validated to published data by other authors. Ejector efficiency is calculated for several operating pressure and ejector geometry: ratio of mixing tube length to diameter. We found that the variation in L/D ratio of mixing tube in current study did not significantly affect the ejector performance. Conversely, it was strongly affected by both motive and suction pressure, where the entrainment ratio is generally higher for lower pressure ratio. On the other hand, the efficiency of ejector process exhibited an optimum behavior, where we obtained the highest efficiency of 26.7% at pressure ratio of 0.1765. Therefore, this result can be utilized as the recommended operating condition. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10286 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; B3.1-B3.10 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; B3.1-B3.10 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10286/5564 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10287 2024-02-06T06:10:11Z kejuangan:ART

Pengaruh Penambahan Jumlah Air terhadap Kekerasan, Kerapuhan dan Waktu Hancur Tablet Obat Fitriyano, Gema Prabowo, Aris AB, Syamsudin Kurniaty, Ika Ismiyati, Ismiyati disintegration time friability hardness jackfruit seed flour tablets The water content in the tablet is related to the compressibility of the tablet, because the water content formed acts as a binder that will fill the empty space between tablets. Excess water content in the tablet formulation can cause the tablet to become hydrophobic so that the tablet is difficult to wet during dissolution and travels in the body. Thus, the tablet will be more difficult to disintegrate in the stomach. The procedure for turning jackfruit seeds into flour are peeling, milling, and drying at a temperature of 105 oC. Following, water at 90 oC is mixed with jackfruit seed flour to make mocilago (mixture 1). fdc yellow and patent blue v dye into a beakerglass containing aquademin 95 oC then stir until completely uniform (mixture 2). Put mixture 1 into mixture 2 which has a temperature >80 oC. In the granulation stage, all ingredients are mixed with fine granulated sugar, magnesium hydroxide, dimethyl polysiloxane, some jackfruit seed flour and hydrotalcite to form mixture 3. Then add the binder solution Granule drying  and  drug printing processes follow. The characterization parameters of tablets produced in this research were tablet friability, tablet hardness and tablet disintegration time. Adding 193.2 mL of water to 25.6 grams of jackfruit seed powder was a variable that gives optimum effect on tablet hardness, friability, and disintegration time Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10287 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; B4.1-B4.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; B4.1-B4.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10287/5565 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10288 2024-02-06T06:10:12Z kejuangan:ART

Karakteristik Morfologi dari Formulasi Pupuk NPK Coated dengan Enkapsulasi Starch-PVA-Glycerol Habibi, Wildan Purnomo, Chandra Wahyu Perdana, Indra Coated NPK copolymerization polyvinyl alcohol slow-release fertilizer starch In modern agriculture, the application of NPK fertilizer plays an important role in food security. However, most commercial uncoated fertilizers have low nutrient absorption efficiency with 30-70% nutrient loss, advances to financial losses for farmers and causing environmental issues. Slow-release fertilizer (SRF) is the best solution to decrease loss rate, supplying nutrients sustainably, and reduces potential negative environmental effects. These fertilizers are made by physically encapsulating NPK fertilizer with organic hydrophobic materials (starch-polyvinyl alcohol (PVA)-glycerol). Double layered encapsulation is formulated by in-situ copolymerization of starch with vinyl acetate monomer from PVA in different ratios. Glycerol is added to increase the film compatibility. Scanning Electron Microscope (SEM) followed by Energy Dispersive X-ray (EDX) analysis reveals the morphological characteristic of uncoated and coated NPK samples. The surface micrograph of uncoated NPK exhibits fine spire crystals that are intensely cemented on to the surface with some bigger crystals of potassium chloride. The gaps and pores are also visible. The SEM micrographs of coated NPK depict layering and agglomeration that is a clear indication of the coating. A higher ratio of PVA increases agglomeration on the surface of coated NPK, representing dense and complete coverage with less pores and cavities occurs Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10288 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; C1.1-C1.5 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; C1.1-C1.5 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10288/5566 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan"

oai:jurnal.upnyk.ac.id:article/10289 2024-02-06T06:10:12Z kejuangan:ART

Pengaruh Penambahan Silica Nanopartikel dan Surfaktan SLS (Sodium Lignosulfonat) terhadap Proses Adsorpsi pada Enhanced Oil Recovery (EOR) Handayani, Destias Selly Yuliansyah, Ahmad Tawfiequrrahman Purwono, Suryo EOR Silica Nanoparticles Adsorption Surfactant SLS Surfactant flooding is a chemically enhanced oil recovery (EOR) technique that removes trapped residual oil by lowering the oil-water interfacial tension. The success of surfactant flooding is strongly affected by surfactant loss through its adsorption process on reservoir mineral rocks. Surfactant adsorption is a test method to determine whether surfactant is adsorbed in the reservoir rocks. In the surfactant adsorption test, only static adsorption was carried out. The mixed-surfactant formulation used 70% surfactant SLS, 22% PFAD, and 8% 1-octanol (w/v). Mixed-surfactant concentration variations are 0.25, 0.5, 0.75, and 1% (w/v). The IFT test results showed that the smallest IFT value at a concentration of 1% is 3.15 x 10-3 mN/M. In this research, adding silica nanoparticles (SNPs) to the mixed-surfactant solution is expected to reduce the interfacial tension (IFT) value and the amount of surfactant adsorbed in the reservoir rocks. Variations of SNPs concentration used are 0.05, 0.09, 0.15, and 0.3% (w/v). The lowest IFT test result by adding concentration SNPs of 0.09% is 2.07 x 10-4 mN/M. The adsorption test result showed that by adding SNPs with concentration 0.09%  with adsorption time of 24h is effective to used for adsorption. Seminar Nasional Teknik Kimia "Kejuangan" Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023-07-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10289 Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; C2.1-C2.6 Prosiding Seminar Nasional Teknik Kimia "Kejuangan"; 2023: PROSIDING SNTKK 2023; C2.1-C2.6 eng https://jurnal.upnyk.ac.id/index.php/kejuangan/article/view/10289/5567 Copyright (c) 2023 Seminar Nasional Teknik Kimia "Kejuangan" b166a9f5156ea2a221720063236a0cdb