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Jurnal Rekayasa Proses
Published by Universitas Gadjah Mada
ISSN : 1978287X     EISSN : 25491490     DOI : -
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering
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.).
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol 10 No 1 (2016): Volume 10, Number 1, 2016" : 5 Documents clear
Evaluasi kehandalan reaktor biogas skala rumah tangga di Daerah Istimewa Yogyakarta dengan metode analisis fault tree Ning Puji Lestari; Siti Syamsiah; Sarto Sarto; Wiratni Budhijanto
Jurnal Rekayasa Proses Vol 10 No 1 (2016): Volume 10, Number 1, 2016
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.34421

Abstract

Biogas technology is one of the solutions for improving sanitation, environment, economy and energy conservation especially for smallholder farmers who are applying mixed crop and livestock farming. Indonesia Domestic Biogas Programme (BIRU) has been implemented in DIY since 2009. However, the household digesters that operate effectively only accounts for less than 50% of the total existing digesters in 2017. These problems should be identified and analyzed for more effective implementation and efficient operation of small-sized biogas system in the future. This research applied fault tree analysis (FTA) method to identify failures and evaluated their effects on the operation of small-sized biogas based on processes, physical component, and human factor point of view. Fourty-one sets of BIRU biogas were selected and sampled using stratified purposive random sampling method. Nineteen minimal cut set and three subsystems were defined, which included process failures, infrastructure failures, and human errors. The fault probabilities of the three subsystems were found to be 0.79; 0.59; and 0.96, respectively. It implied that human error gave the highest probability of errors, followed by process failure, while the physical structure of the reactor had been sufficiently well controlled. This study suggested that careful selection on prospective users should be conducted prior to installation, to ensure the motivation of the users in maintaining the reactor in good conditions. Besides, trainings and assistance system are also required to improve the skills of the user to maintain the performance of their reactor.
Evaluasi pengaruh konsentrasi umpan pada produksi biogas dari limbah cair industri alkohol secara fed batch Dewi Astuti Herawati; Argoto Mahayana
Jurnal Rekayasa Proses Vol 10 No 1 (2016): Volume 10, Number 1, 2016
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.34422

Abstract

Biogas is an alternative energy source that can be renewed as one of the solutions for the scarcity of fossil energy. Liquid waste from industrial bioalcohol production (technically termed as “vinasse”) is potentially one of very promising raw material of biogas. Vinasse has low pH value (4-5), which is not preferable for metanogen. Therefore this study aimed to define the optimum condition for the production of biogas. The variable to be studied in this research was the influence of vinasse to water ratios on the production of biogas in a fed batch reactor. Three ratios of vinasse and water with the ratios of vinasse to water as 1:2 (R1); 1:2.5 (R2); and 1:3 (R3) were studied. As much as 500 mL of raw material was fed to bioreactor with 6 L of cow manure as starter inoculums. The reactor was fed once every three days, with the feed input as much as 500 mL. At the beginning of the process, total solid suspended (TSS), volatile suspended solid (VSS) and chemical oxygen demand (COD) were analyzed. The volume of biogas was measured every day while the TSS and VSS values were measured once a week. The results showed that the production of biogas at R1 reached 1640.95 ml on day 9 with pH 7, CH4 concentration of 9.89% and CO2 level of 36.93%. The biogas production at R2 on day 20 reached 119.67 mL with a methane content of 15.85%, 43.282% of CO2 level, and pH 5. In R3 the volume biogas generated on day 10 reached 158.24 mL with CH4 content of 35.36%; 35.27% of CO2 level and pH 7. Fed batch system was shown to reduce the effects of inhibitor.
Kinetika kalsinasi seria zirkonia dari proses gelasi eksternal Fera Wahyuningsih; Wahyudi Budi Sediawan; Teguh Ariyanto; Sri Widiyati
Jurnal Rekayasa Proses Vol 10 No 1 (2016): Volume 10, Number 1, 2016
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.34423

Abstract

Calcination process is one of the important steps in the synthesis of nuclear fuel particles for High Temperature Reactor (HTR). In this work, the calcination process of Ceria-Stabilized Zirconia (CSZ) was carried out. The aims of the study are to study the kinetic modelling of calcination process of CSZ kernel, to determine the suitable operation condition, and to observe physical characters of the calcined material. The feed of calcination process was material prepared by an external gelation. The calcination was conducted from room temperature to 500 oC with heating rate of 1 and 2 °C/min. CSZ kernel per grain was weighted and the diameter was measured during calcination process, hence determining the weight loss and size change. The results showed that there was a weight loss of kernel during calcination process. When the weight of grain reached a constant value, the process of calcination was considered complete.
Pengaruh jenis limbah dan rasio umpan pada biokonversi limbah domestik menggunakan larva black soldier fly (Hermetia illucens) Mahfudl Sidiq Muhayyat; Ahmad Tawfiequrrahman Yuliansyah; Agus Prasetya
Jurnal Rekayasa Proses Vol 10 No 1 (2016): Volume 10, Number 1, 2016
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.34424

Abstract

The high content of protein is the main reason for domestic waste to be potentially processed by bioconversion using Hermetia illucens larvae. Hermetia illucens larva can accumulate protein content as high as 45-50% and fat which reaches 24-30%, so that it becomes a good source of highly nutritious feed. This research studied the production of Hermetia illucens larvae through bioconversion process on rice waste, cassava leaf, and mixed rice-cassava leaf (with the weight ratio of 1: 1), by varying the feed rate of 60, 80, and 100 mg/larva/day. The experiment was conducted for 21 days. Samples were taken periodically to be analyzed for their weight, substrate consumption, and waste reduction index. Proximate analysis was conducted on raw material and larvae media. The results of this study indicated that the optimum waste for larvae was the mixed rice-cassava leaf waste with feed rate of 60 mg/larva/day or total weight of 10.00 grams per feeding. At this condition, the optimal waste reduction in the bioconversion process was observed as substrate consumption of 65.82% and the waste reduction index of 18.02%.
Integrasi proses elektrokoagulasi-elektrooksidasi sebagai alternatif dalam pengolahan limbah cair batik zat warna naftol Fikry Nashrullah K; Muslikhin Hidayat; Moh. Fahrurrozi
Jurnal Rekayasa Proses Vol 10 No 1 (2016): Volume 10, Number 1, 2016
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.34425

Abstract

The production of batik produces wastewater which contains mixture of complex organic macromolecules. In this study, a sequential process of electrocoagulation-electrooxidation (EC-EO) using electrodes of aluminium-graphite and PbO2-graphite was proposed as an alternative method for treating wastewater of naphthol from batik dyeing process. The effects of parameter of current density of in the range of 3.7-7.90 mA/cm2, and the effect of electrical voltage to the decrease of color intensity. The electrocoagulation-electrooxidation method was carried out in a batch reactor with a capacity of 1.3 L, where the first 20 minutes is the electrocoagulation process and the next 100 minutes is the electrooxidation process. The samples were drawn at 10, 20, 40, 60, 80, 100 and 120 minutes and their color intensity was analyzed using spectrophotometric method. The results showed that the highest decreased value was at 99,78% at the current density (7,53 mA/cm2) during 120 minutes with electricity consumption 14,40 kWh/m3. The higher the density of the current, the greater the decrease value of color intensity in the liquid naphthol waste.

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