Jurnal Teknik Kimia USU https://talenta.usu.ac.id/jtk <p>Jurnal Teknik Kimia USU is an accredited national journal that publishes research articles, literature reviews, and fieldwork in chemical engineering. This journal is published by TALENTA Publisher, Universitas Sumatera Utara and managed by Chemical Engineering Department, Engineering Faculty, Universitas Sumatera Utara. This journal is not limited to scientific publications produced by students and lecturers of the Universitas Sumatera Utara but also open to students, lecturers and researchers from other institutions. From 2012 to 2017, this journal has been published four times a year but since 2018, this journal has published scientific publications regularly twice a year in March and September. This is done in order to increase the selectivity of incoming articles in order to maintain the quality of scientific publications in this journal.</p> <p>Due to technical problems in the previous Open Journal System (OJS) system, since Vol. 8 No. 2 of 2019, the Jurnal Teknik Kimia USU was moved to <a href="https://talenta.usu.ac.id/jtk/">https://talenta.usu.ac.id/jtk/</a> which was facilitated by Talenta Publisher, Universitas Sumatera Utara, in order to improve the governance of scientific publications in the OJS.</p> <p>In 2022, the Jurnal Teknik Kimia USU has been accredited by the National Journal Accreditation (ARJUNA) Managed by the Ministry of Education, Culture, Research, and Technology, Republic Indonesia with Third Grade <a href="https://drive.google.com/file/d/18-b8Tg2OFtwFLV-venRoG79Tz9I-Bie_/view?usp=share_link" target="_blank" rel="noopener"><strong>(Sinta 3)</strong></a> since the year 2022 to 2026 according to the decree <a href="https://drive.google.com/file/d/1XRvgkEm1iB4P0G--weejcoEmgi9sMPfk/view?usp=sharing" target="_blank" rel="noopener">No. 225/E/KPT/2022, December 7, 2022</a>, Regarding Scientific Journal Accreditation Rank Period III of 2022.</p> Talenta Publisher (Universitas Sumatera Utara) en-US Jurnal Teknik Kimia USU 2337-4888 Pengaruh Perlakuan Awal terhadap Karakteristik Bioetanol dari Limbah Kulit Singkong Karet (Manihot glaziovii) https://talenta.usu.ac.id/jtk/article/view/13174 <p>Rubber cassava peel waste (<em>Manihot glaziovii</em>) has a high carbohydrate content, so it is feasible to convert it into bioethanol. In general, bioethanol production consists of four steps, pretreatment, hydrolysis, fermentation, and purification. The purpose of this study was to determine the suitable treatment for obtaining bioethanol with the finest characteristics from rubber cassava peel using three treatment variations, the pretreatment process with variations in the dissolving ratio of sodium hydroxide (NaOH) 0.5 M of 1:10; 1:12.5; and 1:15 (w/v), the hydrolysis process with various concentrations of sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) of 0.15 N; 0.30 N; and 0.45 N, and the fermentation process with variations in the fermentation time for 3 days, 7 days, and 9 days. Based on the research results, the highest glucose content was 0.91%, with variations in dissolving NaOH 0.5 M 1:15 (w/v) in the pretreatment process and variations in the concentration of 0.30 N H<sub>2</sub>SO<sub>4</sub> in the hydrolysis process, while the highest ethanol content was 68.05% at a fermentation time of 7 days.</p> Reni Yuniarti Arysca Wisnu Satria Wandha Wiandini Nabhila Zaezarini Feerzet Achmad Fauzi Yusupandi Copyright (c) 2024 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 1 8 10.32734/jtk.v13i1.13174 Aplikasi Edible Coating dari Limbah Kulit Udang dengan Aditif Asap Cair untuk Kemasan Sosis Sapi Antibakteri Ramah Lingkungan https://talenta.usu.ac.id/jtk/article/view/15484 <p>Edible coating is a food preservation technique by coating using antimicrobial substances which can inhibit the growth of bacteria. This research aims to develop an edible coating from shrimp shell waste with liquid smoke additives as antibacterial packaging for processing beef sausages. Chitosan is made in three stages, namely demineralization, deproteination and deacetylation. Beef sausages coated with edible coating were tested using organoleptic and antibacterial tests. The results of this research showed that the highest degree of deacetylation of chitosan was found in the variable concentration of sodium hydroxide (NaOH) 55% with a degree of deacetylation value of 93.59%. The water and protein content in beef sausages coated with edible coating with liquid smoke showed values of 52.45% and 12.65% on the 7th day. This is in accordance with the Indonesian National Standards (SNI). Coating beef sausages using edible coating from 2% chitosan with 8% liquid smoke solvent has antimicrobial properties because in the antibacterial test a clear zone appeared on the beef sausages coated with edible coating.</p> Hanif Ardhiansyah Radenrara Dewi Artanti Putri Catur Rini Widyastuti Widi Astuti Gusti Maulana Negoro Monatalia Lamtama Situmorang Delvani Putri Faradilla Hamid Copyright (c) 2024 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 9 16 10.32734/jtk.v13i1.15484 Karakterisasi Biofilm Selulosa Bakteri dengan Modifikasi Gliserol secara Ex Situ https://talenta.usu.ac.id/jtk/article/view/13560 <p>Bacterial cellulose (BC) is biomaterial from bacterial fermentation that contain high purity of cellulose, but 90% of BC pellicles retained water from the fermentation process. In this study, BC was modified with glycerol immersion in different concentrations (0%; 2,5%; 5%; 7,5%; 10%). For wide application, water content on BC must be removed by drying. Various oven drying condition are temperature 80 °C and 120 °C and time 60 minutes. The physical and mechanical properties of the dried BC biofilm were determined including tensile strength and elasticity. BC biofilm bound was identified by FTIR and EDX. The results showed that glycerol concentration was able to increase biofilm elasticity from 3.46% to 27.743%. However, glycerol immersion above 7.5% caused a decrease in the tensile strength of BC biofilm. The drying variation of 120 °C produces the highest tensile strength of 7.161 MPa when soaked in 7.5% glycerol. The drying variation of 80 °C produced a biofilm with the best elasticity of 27.473%. The results of FTIR and EDX analysis confirmed that there were differences in the contents of the modified BC.</p> Vera Diana Panjaitan Iriany Lilis Sukeksi Copyright (c) 2024 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 17 23 10.32734/jtk.v13i1.13560 Pengolahan Pati Rumbia menjadi Serbuk Glukosa secara Hidrolisis Enzimatis dengan Variasi Perbandingan Pati dan Air, Suhu Evaporasi, dan Suhu Pengeringan https://talenta.usu.ac.id/jtk/article/view/13327 <p>Glucose is a simple sugar that can be used as an sucrose alternative. Rumbia starch is rich in carbohydrates and abundant in Indonesia, potentially being used as a raw material for the production of glucose powder. The process involves starch hydrolysis, evaporation, and drying. The purpose of this study was to obtain optimal conditions of reducing sugar content, evaporation, and drying temperature based on variations in starch and water ratio (1:3, 1:4, 1:5, and 1:6), evaporation temperature (100 °C and 115 °C), and drying temperature (50 °C, and 70 °C). From this study, the optimal ratio of starch and water was 1:4 with a reduced sugar content of 99,77%. The optimal evaporation temperature was 115 °C, the brix content obtained is 85%, and the optimal drying temperature was 70°C, the water content obtained is 3,60%. Based on SNI of glucose, the glucose powder products meet the standard for water content and ash content. However, only in the ratio of starch and water 1:4 and 1:5, the reducing sugar content met the SNI of glucose.</p> Nandyta Rizqi Az’zahrah Erwana Dewi Muhammad Yerizam Copyright (c) 2024 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 24 31 10.32734/jtk.v13i1.13327 Studi Pengaruh Variasi Konsentrasi Garam Dapur (NaCl) sebagai Larutan Elektrolit dan pH Bahan Baku dalam Pembuatan Biobaterai Kering Berbasis Limbah Kulit Pisang Kepok https://talenta.usu.ac.id/jtk/article/view/11622 <p>Batteries are single-use energy. Battery waste disposed on the ground will produce waste that is difficult to decompose naturally. Batteries contain chemicals that are toxic to soil fertility, such as potassium and sodium. One way to utilize battery waste is to turn it into bio-batteries. This research aims to minimize the waste of batteries and kepok banana peels that are underutilized by making environmentally friendly bio-batteries. This study also determines the voltage, current, and power of kepok banana skin-based bio-batteries. The method used is to conduct biobattery trials using paste from kepok banana peels. The results showed that kepok banana peels could conduct electricity to be used as a paste for bio-battery. The most significant voltage generated is 1.38 volts, while the largest current generated is 0.95 A. This bio-battery can last an average of 3 days 8 hours or 92.5 hours.</p> Maya Sarah Elfina Rahmania Zelfi Marisa Pancar Kuswara Isti Madinah Hasibuan Copyright (c) 2023 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 32 39 10.32734/jtk.v13i1.11622 Pengaruh Kenaikan Laju Alir Fluida Panas dan Arah Aliran terhadap Kinerja Plate and Frame Heat Exchanger https://talenta.usu.ac.id/jtk/article/view/14321 <p>Plate and Frame Heat Exchanger (PFHE) is a plate and frame type heat exchanger that is efficient and effective in improving energy efficiency. Research using PFHE aims to determine the effect of increasing the flow rate of hot fluid on heat exchanger performance. This research was conducted at a flow rate variation of 0.7 L/min, 0.9 L/min, 1.1 L/min, 1.3 L/min, 1.5 L/min, 1.7 L/min, and 1.8 L/min with 180 seconds of testing each variation and recording data every 2 seconds. The cold fluid used is tap water and the hot fluid used is distilled water. The results showed that with the increase in hot fluid flow rate, the performance of PFHE also increased because the effectiveness of NTU (Ɛ-NTU) increased. The Ɛ-NTU value of unidirectional flow is 25.37% - 44.87% and in the opposite direction 37% - 68.39%. The largest Ɛ-NTU value in the countercurrent flow indicates that the countercurrent flow is more effective than the unidirectional flow. In addition, increasing the flow rate increases the Reynold's number (Nre) and Nusselt's number (Nu) which indicates the greatest convection heat transfer occurs at the highest flow rate.</p> Feerzet Achmad Roy Naldi Dikri Uzlifah Janah Rifqi Sufra Reni Yuniarti Copyright (c) 2024 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 40 47 10.32734/jtk.v13i1.14321 Pengaruh Jenis Cairan, Jenis Batang, dan Panjang Batang pada Penentuan Distribusi Ukuran Partikel Bubuk Kaca Menggunakan Buoyancy Weighing-Bar Method (BWM) https://talenta.usu.ac.id/jtk/article/view/15766 <p>Particle size distribution is one of the important physical parameters in industry. A new method has been developed, the buoyancy weighing-bar method to determine the particle size distribution. This study examines the application of the buoyancy weighing-bar method for the determination of the particle size distribution of glass powder. Measurements were made by varying the type of liquid, the type of rod, and the size of the rod length. From this study, it was obtained that the best condition in determining the particle size distribution of glass powder is using aluminum rods with a length of 210 mm in 96% ethanol. The results of determining the particle size distribution of glass powder by using the buoyancy weighing-bar method at the best conditions are comparable to the results of determining the particle size distribution obtained using the settling balance method.</p> Ari Fernando Panjaitan Anrocki Sirait Rondang Tambun Copyright (c) 2024 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 48 53 10.32734/jtk.v13i1.15766 Analisis Pengaruh Penambahan Magnesium Oksida terhadap Sifat Mekanis Bioadhesif Berbasis Kitosan-Karagenan https://talenta.usu.ac.id/jtk/article/view/14656 <p>This study investigates the effect of magnesium oxide (MgO) as a filler in enhancing the bioadhesive properties of chitosan and carrageenan-based adhesives. The primary focus is on improving tensile strength, viscosity, solid content, and thermal properties. The results indicate that the addition of 0.75% w/v MgO significantly increased tensile strength from 9.76 kPa to 21.76 kPa and viscosity from 34.26 cP to 617 cP with a 0.5% w/v MgO addition. The solid content also increased from 9.81% to 13.19% with increased MgO concentration. The addition of benzoyl peroxide (BPO) reduced curing time, enhancing process efficiency. Scanning Electron Microscopy and Fourier Transform Infrared Spectroscopy confirmed improvements in structural and chemical stability, while Differential Scanning Calorimetry showed better curing efficiency. This study suggests MgO as a potential filler to improve mechanical properties and adhesion of bioadhesives, relevant for medical applications.</p> Monica Putri Amanda Budhijanto Gilang Afif Setya Ramadhani Copyright (c) 2024 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 54 62 10.32734/jtk.v13i1.14656 Karakteristik Sifat Fisik Membran Elektrolit Polimer Berbasis Kitosan Larva Black Soldier Fly/Polivinil Alkohol/Poliakrilonitril dengan Penambahan Ammonium Klorida https://talenta.usu.ac.id/jtk/article/view/15595 <p>Black soldier fly larvae shells/BSF-based chitosan can be utilized as polymer electrolyte membrane. This research aims to analyze the physical characteristics of BSF chitosan/PVA/PAN/NH<sub>4</sub>Cl by varying amount of chitosan and ratio of PVA: PAN. Membrane was fabricated using the phase inversion method. Polymer electrolyte with a mixture of 1.20 g of PVA/PAN with ratio variations of 10:90 and 20:80 and chitosan variations of 2.4 g; 2.8 g; and 3.2 g. Chitosan was also FTIR-characterized. Density and wáter absorption of polymer electrolyte with chitosan composition of 2.4 g; 2.8 g; 3.2 g and PVA/PAN ratio of 10:90 were 0.824 g/mL; 1 g/mL and 1.51 g/mL and water absorption 28.571%; 38.333%; and 46.154%, respectively; and at PVA/PAN ratio of 20:80 were 0.734 g/mL; 1.03 g/mL and 1.096 g/mL and water absorption 62.5%; 66.667% dan 100%, respectively. Best physical property was obtained with the incorporation of 2.4 g of chitosan and 10:90 PVA/PAN ratio.</p> Muhammad Thoriq Al Fath Nisaul Fadilah Dalimunthe Rivaldi Sidabutar Michael Rosma Natalia Samosir Thiodorus Marvin Tjandra Copyright (c) 2024 Jurnal Teknik Kimia USU https://creativecommons.org/licenses/by-sa/4.0 2024-03-23 2024-03-23 13 1 63 70 10.32734/jtk.v13i1.15595