Jurnal Rekayasa Proses
Jurnal Rekayasa Proses is an open-access journal published by Chemical Engineering Department, Faculty of Engineering, Universitas Gadjah Mada as scientific journal to accommodate current topics related to chemical and biochemical process exploration and optimization which covers multi scale analysis from micro to macro and full plant size. Specialization topics covered by Jurnal Rekayasa Proses are: 1. Kinetics and Catalysis Includes simulations and experiments in reaction kinetics, catalyst synthesis and characterization, reactor design, process intensification, microreactor, multiphase reactors, multiscale phenomena, transfer phenomena in multiphase reactors. 2. Separation and Purification System Includes phase equilibrium, mass transfer, mixing and segregation, unit operation, distillation, absorption, extraction, membrane separation, adsorption, ion exchange, chromatography, crystallization and precipitation, supercritical fluids, bioprocess product purification. 3. Process System Engineering Includes simulation, analysis, optimization, and process control on chemical/biochemical processes based on mathematical modeling; multiscale modeling strategy (molecular level, phase level, unit level, and inter-unit integration); design of experiment (DoE); current methods on simulation for model parameter determination. 4. Oil, Gas, and Coal Technology Includes chemical engineering application on process optimization to achieve utmost efficiency in energy usage, natural gas purification, fractionation recovery, CO2 capture, coal liquefaction, enhanced oil recovery and current technology to deal with scarcity in fossil fuels and its environmental impacts. 5. Particle Technology Includes application of chemical engineering concepts on particulate system, which covers phenomenological study on nucleation, particle growth, breakage, and aggregation, particle population dynamic model, particulate fluid dynamic in chemical processes, characterization and engineering of particulate system. 6. Mineral Process Engineering Includes application of chemical engineering concepts in mineral ore processing, liberation techniques and purification, pyrometallurgy, hydrometallurgy, and energy efficiency in mineral processing industries. 7. Material and biomaterial Includes application of chemical engineering concepts in material synthesis, characterization, design and scale up of nano material synthesis, multiphase phenomena, material modifications (thin film, porous materials etc), contemporary synthesis techniques (such as chemical vapor deposition, hydrothermal synthesis, colloidal synthesis, nucleation mechanism and growth, nano particle dispersion stability, etc.). 8. Bioresource and Biomass Engineering Includes natural product processing to create higher economic value through purification and conversion techniques (such as natural dye, herbal supplements, dietary fibers, edible oils, etc), energy generation from biomass, life cycle and economic analysis on bioresource utilization. 9. Biochemistry and Bioprocess Engineering Includes biochemical reaction engineering, bioprocess optimization which includes microorganism selection and maintenance, bioprocess application for waste treatment, bioreactor modeling and optimization, downstream processing. 10. Biomedical Engineering Includes enhancement of cellular productions of enzymes, protein engineering, tissue engineering, materials for implants, and new materials to improve drug delivery system. 11. Energy, Water, Environment, and Sustainability Includes energy balances/audits in industries, energy conversion systems, energy storage and distribution system, water quality, water treatment, water quality analysis, green processes, waste minimization, environment remediation, and environment protection efforts (organic fertilizer production and application, biopesticides, etc.).
Articles
273 Documents
<![CDATA[Nilai parameter kadar pencemar sebagai penentu tingkat efektivitas tahapan pengolahan limbah cair industri batik lilin ]]>
<![CDATA[Indrayani Indrayani]]>;
<![CDATA[Nur Rahmah]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 1 (2018): Volume 12, Number 1, 2018 ]]>
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DOI: 10.22146/jrekpros.35754
<![CDATA[Batik industry sector has a strategic role in development, especially to increase the level of employment and its contribution in encouraging the growth of creative economy. Along with the development of batik industry that has been known globally, batik industry produces a negative impact of liquid waste in a large amount which will potentially pollute the environment. This paper described the characteristics of batik industrial wastewater and its treatment stages both in physics, chemistry and biology. The treated wastewater is analyzed and adjusted to the required wastewater quality standard parameters. The wastewater treatment plant in Balai Besar Kerajinan dan Batik (BBKB) consist of physical process i.e. sedimentation, biological process i.e. anaerobic treatment and chemical process i.e. coagulation. The efficiency of the process is determined by the value of test results at each stage of wastewater treatment. The efficiency of physical, biological and chemical process in this plant were 71.69%; 55,31%; 40.75%, respectively. According to the results, the treated wastewater could be discharged safely to the environment.]]>
<![CDATA[Karakteristik bio-briket berbahan baku batu bara dan batang/ampas tebu terhadap kualitas dan laju pembakaran ]]>
<![CDATA[Nurhalim Nurhalim]]>;
<![CDATA[Rochim Bakti Cahyono]]>;
<![CDATA[Muslikhin Hidayat]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 1 (2018): Volume 12, Number 1, 2018 ]]>
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DOI: 10.22146/jrekpros.35278
<![CDATA[Indonesia has a very large fossil fuel source such as coal. In Indonesia, almost all power plants and industries use coal as solid fuel. Burning coal produces fly ash, bottom ash, poisonous gas and unused coal residue. The coal waste is commonly found in mining operations, abandoned mining areas, laboratories and power plants. This problem could be solved by producing bio-briquette using the coal waste. In this study, laboratory scale pyrolysis and non pyrolysis methods were used to produce bio-briquette using the coal waste with measurement of proximate analysis and burning rate. Pyrolysis was carried out at constant temperature of 400 oC for 2 hours. The total weight of briquette sample as much as 99.87 g was burnt at 400 oC with sufficient air space in the furnace. The waste coal was mixed with biomass bagasse and sugar cane stems before the briquetting process. The composition of the briquette material was 50 g of coal waste, 30 g of sugar cane biomass, and 10 g of bagasse. To form the briquette, tapioca was used as adhesive in addition to 5 g of clay with 50 mesh of size and application of 50 kg/cm2 pressure. The result of proximate analysis and combustion of the non-pyrolysis bio-briquette showed that non-pyrolysis bio-briquette contained 4.17 % of moisture content, 18.39% of fly ash, 25.56% of ash content, 5157.87 cal/g of calorific value. The mass of of pyrolysis bio-briquette (50 g) decreased to 30 g during 30 minutes, the compulsion reached maximum speed on 1.93 g/s and the smoke disappeared on the 24th minute The pyrolysis process on coal waste decreased the smoke and the addition of biomass increased the calorific value of bio-coal briquette.]]>
<![CDATA[Benefisiasi bijih emas dan perak kadar rendah menggunakan palong dan metode flotasi ]]>
<![CDATA[Widi Astuti]]>;
<![CDATA[Kusno Isnugroho]]>;
<![CDATA[Fika Rofiek Mufakhir]]>;
<![CDATA[Ulin Herlina]]>;
<![CDATA[Isti Nurjanah]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 2 (2018): Volume 12, Number 2, 2018 ]]>
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DOI: 10.22146/jrekpros.35483
<![CDATA[Beneficiation of low-grade gold and silver ores were investigated by gravity concentration flotation methods. The ores were obtained from Way Kanan Region and Mount Burhan in Province of Lampung. In this study, gravity concentration in sluice box and flotation were performed in sequence. Effect of particle size was investigated in gravity concentration by sluice box. Furthermore, effect of various parameters in flotation operation such as concentration of collector, ore particle size, and processing time were studied. Gravity concentration in sluice box indicated that the highest recovery of gold and silver were 76.52% and 94.83%, respectively when using ore particle size of 100+150 mesh. Flotation experiments showed that the maximum recoveries of gold and silver obtained were 98.33% and 86.42%. The conditions to obtain maximum recovery in this study were -100+150 mesh of ores particle size, 25 mL/kg concentration of collector, and 25 minutes of processing time.]]>
<![CDATA[Perbandingan kinerja penyetelan Hagglund-Astorm dan TyreusLuyben pada sistem kendali pendinginan susu ]]>
<![CDATA[Rudy Agustriyanto]]>;
<![CDATA[Anastasia Febriyanto]]>;
<![CDATA[Putu Sri Widiawati]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 2 (2018): Volume 12, Number 2, 2018 ]]>
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DOI: 10.22146/jrekpros.38211
<![CDATA[Milk cooling process is one of the most important milk processing steps after milk extraction process. Milk cooling process is carried out to inhibit the microbial growth. The milk is cooled from room temperature to 4 °C. Generally, this process is performed in batch installation. In this research, continuous milk cooling would be simulated. First, the model of the system was derived from the mass and heat balance. The simulation results were then identified using the System Identification Toolbox (SIT) on Matlab. System Identification Toolbox was used to build the mathematical models of dynamic system based on measured input and output data. The result of system identification is useful for setting control and stability analysis. The milk cooling system was then controlled by Proportional Integral (PI) Control. There are two kinds of tuning methods that will be analyzed. These are Hagglund-Astorm method and Tyreus-Luyben. The results showed that the control performance tuned using the Tyreus-Luyben method was better than the Hagglund-Astorm method from the criteria of its SSE (sum squared of error).]]>
<![CDATA[Studi kinetika proses atmospheric pressure acid leaching bijih laterit limonit menggunakan larutan asam nitrat konsentrasi rendah ]]>
<![CDATA[Kevin Cleary Wanta]]>;
<![CDATA[Felisha Hapsari Tanujaya]]>;
<![CDATA[Ratna Frida Susanti]]>;
<![CDATA[Himawan Tri Bayu Murti Petrus]]>;
<![CDATA[Indra Perdana]]>;
<![CDATA[Widi Astuti]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 2 (2018): Volume 12, Number 2, 2018 ]]>
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DOI: 10.22146/jrekpros.35644
<![CDATA[Kinetics study of atmospheric pressure acid leaching (APAL) process is indispensable for extractor design in an industrial scale. So far, the kinetic model used for this process is the shrinking core model. In this study, the shrinking core model was evaluated against experimental data for laterite leaching process using a solution of low concentration nitric acid (0.1 M). Variations in temperature and particle size were carried out at 303–358 K and <75–250 microns. Other operating conditions, such as pulp density, stirring speed, and time were kept at 20% w/v, 200 rpm, and 120 minutes, respectively. The model evaluation results showed that the shrinking core model was not suitable for this process because the process controlling stage is not just one stage only.]]>
<![CDATA[Kajian dampak lingkungan pada sistem produksi listrik dari limbah buah menggunakan life cycle assessment ]]>
<![CDATA[Fajar Marendra]]>;
<![CDATA[Anggun Rahmada]]>;
<![CDATA[Agus Prasetya]]>;
<![CDATA[Rochim B. Cahyono]]>;
<![CDATA[Teguh Ariyanto]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 2 (2018): Volume 12, Number 2, 2018 ]]>
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DOI: 10.22146/jrekpros.36425
<![CDATA[Producing biogas by anaerobic digestion (AD) is a promising process that can simultaneously provide renewable energy and dispose solid waste safely. However, this process could affect environment e.g. due to greenhouse gas emissions. By life cycle assessment (LCA), we assessed the environmental impact (EI) of an integrated fruit waste-based biogas system and its subsystems of Biogas Power Plant Gamping. Data were collected from an actual plant in Gamping, Sleman, Yogyakarta, Indonesia that adopted a wet AD process at mesophilic condition. The results showed that the global warming potential (GWP) emission of the system reached 81.95 kgCO2-eq/t, and the acidification potential (AP), eutrophication potential (EP), human toxicity potential (HTPinf) and fresh water ecotoxicity (FAETPinf) emissions were low. The EI was mainly generated by two subsystems, namely, the electricity generation and the digestate storage. A comparison analysis showed that the GWP become the main contributor of environmental loads produced by Biogas Plant Gamping, Suazhou Biogas Model, Opatokun Biogas Model, Opatokun Pyrolisis Model, dan Opatokun Integrated System Anaerobic Digestion and Pyrolisis. The GWP impact control and reduction could significantly reduce the EI of the system. It has been shown that improving the technology of the process, the electricity generation and the digestate storage will result in the reduction of EI of the biogas system.]]>
<![CDATA[Aplikasi koagulan biji asam jawa dalam penurunan konsentrasi zat warna drimaren red pada limbah tekstil sintetik pada berbagai variasi operasi ]]>
<![CDATA[Angela Martina]]>;
<![CDATA[Dian Santoso Effendy]]>;
<![CDATA[Jenny Novianti M. Soetedjo]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 2 (2018): Volume 12, Number 2, 2018 ]]>
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DOI: 10.22146/jrekpros.38948
<![CDATA[Since textile industries use a lot of water in their processes, a huge volume of waste water containing dyes are produced by the increase of the production capacity. Coagulation and flocculation are the common processes applied since they can effectively decrease the dye concentration in the waste water. These treatments usually utilize chemical coagulant and flocculant which are expensive and non-biodegradable. In this research, tamarind seed as one of biobased-coagulants was studied and developed to reduce drimaren dark red HF-CD concentration which is used widely in textile industry in the synthetic waste water. The research was designed using Design Expert 7.0.0, Central Composite Design with range of variables as follows: pH (2-7), tamarind seed concentration (1-3 g/L), and dye concentration (20-30 ppm). The result shows a promising application of natural coagulant up to 94.25% decrease of dye concentration in the optimum condition of 3.68 g/L tamarind seed concentration, 25 ppm dye concentration and pH value of 4.5.]]>
<![CDATA[Pengaruh suhu operasi terhadap penentuan karakteristik pengeringan busa sari buah tomat menggunakan tray dryer ]]>
<![CDATA[Tri Hariyadi]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 2 (2018): Volume 12, Number 2, 2018 ]]>
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DOI: 10.22146/jrekpros.39019
<![CDATA[Food damage can be caused by intrinsic and extrinsic factors. The causes of intrinsic factors involve water activity (aw) and moisture content, the level of maturity and the nature of the food material itself. Meanwhile, the causes of extrinsic factors were the air composition, temperature, pressure, population and microbial contamination. Drying is one of the most widely used preservative methods, namely by evaporating most of the water contained in food by heat energy. This work studied the effect of operating conditions on the characteristics of tomato drying using tray dryer with the addition of foaming agent albumin and carrier agent dextrin which function as foam stabilizer. Tomatoes used as raw materials were ripe tomatoes, fresh red, and the same relative diameter, not physiologically and mechanically damaged. In this work, tomatoes were sliced, crushed for 10 minutes using blender, separated from the seeds and the residues with a 60-mesh sieve, and then mixed with dextrin and foaming agent albumin each as much as 5% weight. The mixture was blended for 10 minutes. The tray dryer was filled with hot air at 2.0 m/sec with temperature variation of 40, 50, 60 or 70°C. The stainless-steel dish containing tomato paste with thickness of 2 mm or 4 mm was inserted to the dryer. The tomato paste was weighted every 5 minutes. It is found, at a thickness of 2 mm, the optimum drying occurred at a temperature of 70 ℃ with critical time, tc, for 0.92 hours, critical water content of the sample, Xc, 1.40 %, and constant drying rate, Rc, 897.12 kg/m2.hour. In drying operations of 4 mm thickness, optimum drying occurs at 50 ℃ temperature with critical time, tc, for 1.92 hours, critical water content of sample, Xc, 2.56 %, and constant drying rate, Rc, 175.52 kg/m2.hour.]]>
<![CDATA[Kajian transpor kreatinin menggunakan membran kitosan-alginat tertaut silang polivinil alkohol (PVA) ]]>
<![CDATA[Ni Putu Sri Ayuni]]>;
<![CDATA[Ni Wayan Yuningrat]]>;
<![CDATA[Ni Wayan Citra]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 12 No 2 (2018): Volume 12, Number 2, 2018 ]]>
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DOI: 10.22146/jrekpros.38401
<![CDATA[The objective of this research was to determine the efficiency of the creatinine transport using chitosan alginate cross linked by polyvinyl alcohol (PVA) 0.1% with 70, 100, and 130 mg/L of creatinine concentration. The subject of this study was the membranes of chitosan alginate PVA, while the object of this study was the efficiency of the creatinine transport. The PVA 0.1% cross-linking chitosan-alginate membrane (1:0.15) was successfully synthesized. The membrane synthesized was characterized by FTIR, as well as tensile and strain test. The FTIR spectra showed that there is a new peak of the amino group of chitosan and carboxyl group of alginate at ca. 1651 cm-1. The hydroxyl group appears at ca. 1088 cm-1 while ester groups at ca. 1088 cm-1 and ca. 1265 cm-1 which indicate the cross binding between alginate and PVA. The water uptake test of the chitosan alginate PVA membrane reaches 257.76% for 6 hours. The tensile test results of the membrane before and after creatinine transport are 2.77 MPa and 12.56 MPa while the strain tests yield 14.24% and 18.51%, respectively. The maximum efficiency of the creatinine transport using the chitosan-alginate cross linked by PVA is 51.02% at 130 mg/L creatinine. This creatinine transport result using the PVA cross linking chitosan-alginate membrane are more efficient than chitosan-pectin membrane (25.24%) with the same creatinine concentration.]]>
<![CDATA[Pengembangan teknologi berbasis media air subkritis dan CO2 bertekanan untuk intensifikasi proses ]]>
<![CDATA[Firman Kurniawansyah]]>
<![CDATA[ Jurnal Rekayasa Proses Vol 13 No 1 (2019): Volume 13, Number 1, 2019 ]]>
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DOI: 10.22146/jrekpros.41868
<![CDATA[Green solvent, an environmentally friendly solvent in form of subcritical water (SBCW) and pressurized CO2, has been used as media in process intensification. It has characteristic of having low or even zero toxicity. Hence it can simplify purification procedure. In this communication, development of technology applications of those green solvents, i.e. extraction, particle synthesis, and reaction engineering, is briefly presented. In general, studies show a positive utilization of green solvents of subcritical water and pressurized CO2. For example, in pectin extraction, yield up to 90% has been obtained when the combined solvent was used. In another application, hydrolysis using SBCW-CO2 as combined solvent has facilitated 100% conversion of pinene.]]>
