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Reaktor
Published by Universitas Diponegoro
ISSN : 08520798     EISSN : 24075973     DOI : https://doi.org/10.14710/reaktor.xx.x.xx-xx
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Materials Science & Nanotechnology
Reaktor invites contributions of original and novel fundamental research. Reaktor publishes scientific study/ research papers, industrial problem solving related to Chemical Engineering field as well as review papers. The journal presents paper dealing with the topic related to Chemical Engineering including: Transport Phenomena and Chemical Engineering Operating Unit Chemical Reaction Technique, Chemical Kinetics, and Catalysis Designing, Modeling, and Process Optimization Energy and Conversion Technology Thermodynamics Process System Engineering and products Particulate and emulsion technologies Membrane Technology Material Development Food Technology and Bioprocess Waste Treatment Technology
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Volume 21 No.4 December 2021" : 5 Documents clear
Characteristic of Kimpul (Xanthosoma sagittifolium) Flour Modified with Hydrogen Rich Water Gita Indah Budiarti; Endah Sulistiawati; Nurani Sofiana; Dessy Norma Yunita
Reaktor Volume 21 No.4 December 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (385.449 KB) | DOI: 10.14710/reaktor.1.1.155-159

Abstract

Kimpul one of tuber that potentially for substitute wheat in Indonesia. The disadvantage of kimpul tubers is that they are easily damaged or not durable because they have a high moisture content. Either method to modify starch is to use hydrogen rich water. The advantages of HRW compared to other modification methods are that HRW is safer, healthier for the body and more economical. The objective of the work was to determine the effect of hydrogen rich water and drying temperature on characteristic kimpul flour. Variables were used in this research pH (3, 6,7,9,11), soaking time (15, 30, 45, 60, and 75 minutes), temperature drying (100,110,120°C). The result is yield maximum obtained 38.67% at pH 7, soaking time 45 minutes and temperature drying 100°C. Swelling power is 0.52%. Structure molecule spherical and, separated. Result of proximate analysis for modified kimpul flour are ash content 4.49%; fat content 0.27%; fiber 4.69%; carbohydrate content 76.25%; protein 4.15%; moisture content 10.14%, energy 313.76 Kal/100 g; reducing sugar 0.78%. Color analysis result L, a and b are 19.63; 1.78 and 9.23 respectively. Hydrogen rich water has a good effect on molecules and color.Keywords: flour, kimpul, hydrogen rich water
Fouling Analysis on Polysulfone/Peg400/ZnO Membrane during Textile Wastewater Treatment Putu Teta Prihartini Aryanti; Febrianto Adi Nugroho; Gatra Buana Winiarti; Ghina Shofi Pratiwi; I Nyoman Widiasa
Reaktor Volume 21 No.4 December 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.583 KB) | DOI: 10.14710/reaktor.1.1.139-145

Abstract

Fouling has become the main problem in long-term application of ultrafiltration (UF) membrane for water and wastewater treatment, significantly reducing membrane productivity. In this paper, fouling on polysulfone-based membrane was analyzed using Hermia’s model during textile wastewater treatment. The UF membrane has been prepared by blending polysulfone (PSf), acetone, and PEG400 in DMAc, with ZnO nanoparticles at a concentration of 1% by weight of polymers (PSf and PEG400). The influence of polysulfone concentration (18 and 20 wt.%) and PEG400 (0 - 25 wt.%) on fouling mechanisms was investigated. It was found that the increase of polysulfone from 18 to 20 wt.% reduced permeate flux from 54 to 25 L.m-2.h-1. Vise versa, the increase of PEG400 concentration enhanced the permeate flux. More stable flux was achieved when 18 wt.% of polysulfone was used to prepare the UF membrane. The fouling type in the UF membrane depends on the characteristics of the membrane. A significant flux decline occurred when used 20 wt.% of polysulfone without the addition of PEG400. Smaller membrane pore and higher hydrophobicity due to high polysulfone concentration induced cake layer of fouling on the membrane surface at the first 40 minutes of ultrafiltration. Further increase of operating time, internal fouling was formed due to the movement of pollutants to the permeate side caused by different concentrations. The highest color rejection (86%) was achieved when 25 wt.% of PEG400 was added in 20 wt.% of polysulfone solution.Keywords: fouling, hermia model, ultrafiltration, wastewater treatment.
Reduction of Fe Using Advanced Oxidation Processes (AOPs) and Electromagnetic Water Treatment (EWT) Veny Luvita; Novan Agung Mahardiono; Hanif Fakhrurroja; Adi Waskito
Reaktor Volume 21 No.4 December 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.358 KB) | DOI: 10.14710/reaktor.1.1.133-138

Abstract

The processing on water treatment in this research is carried out by using two combination methods of Advanced Oxidation Processes (AOPs) and Electromagnetic Water Treatment (EWT). The application of AOPs method is one of alternative to remove heavy metals while the application of EWT method is to improve water quality and to prevent the using of expensive chemicals or corrosive substances. The using of chemicals can cause new problems that endanger human health or damage the environment. This paper presents the advantage of the combining these methods is the high ability to process contaminated water into clean water. AOPs and EWT system configuration is needed to determine the effectiveness of the processing system, especially in removing heavy metal minerals such as iron (Fe). Based on the efficiency result, the configuration by using AOPs + EWT reduces the iron (Fe) mineral content by 99,33% and increases the pH value by 6.09.Keywords: water; treatment; substances; metal; mineral
Dynamic and Steady Model Development of Two-Chamber Batch Microbial Fuel Cell (MFC) Ardiyan Harimawan
Reaktor Volume 21 No.4 December 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.1.1.160-169

Abstract

As an alternative source of renewable energy that has piqued researchers’ interest, Microbial Fuel Cell’s (MFC) limitation of low power density requires further development. Various factors affect the performance, but performing all will be costly and time-consuming. Through a combination of dynamic and steady-state mathematical model modified from past research, effect of microbe types towards dynamic biofilm formation and stead-state OCV can be observed, followed by steady-state simulation to determine maximum power density and its’ corresponding voltage. Similarity with previous research has been observed, with maximum OCV of 838.93 mV achieved by heterotrophic biomass in 75-100 hours with biofilm thickness of 2.087 x 10-4 m, while generating maximum power density of 2050.12 mW//m2 and voltage of 408.16 mV. Lowest OCV value of 838.76 mV was observed in C. sporogenes in 450-475 hours with a biofilm thickness of 2.079 x 10-4 m, while the lowest value of maximum power density was observed in anaerobic microbial communities at 8.48 mW/m2 with voltage of 90.43 mV. Furthermore, it has been observed that variations with higher  and lower  results in higher stead-state OCV in the shortest amount of time, while increasing power density and its’ corresponding voltage. @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536869121 1107305727 33554432 0 415 0;}@font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-469750017 -1073732485 9 0 511 0;}p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman",serif; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-US;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt; font-family:"Calibri",sans-serif; mso-ascii-font-family:Calibri; mso-fareast-font-family:Calibri; mso-hansi-font-family:Calibri; mso-ansi-language:IN; mso-fareast-language:IN;}div.WordSection1 {page:WordSection1;}
Valorisation of Shrimp Waste into Chitosan/Montmorillonite-Sulfosuccinic Acid Composite Membrane for DMFC Application Shalahudin Nur Ayyubi; Lukman Atmaja; Aprilina Purbasari
Reaktor Volume 21 No.4 December 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (484.509 KB) | DOI: 10.14710/reaktor.1.1.146-154

Abstract

Composite membranes have been synthesized from biopolymer chitosan (CS) and nanosized montmorillonite (MMT) filler crosslinked with sulfosuccinic acid (SSA) as an alternative membrane electrolyte for direct methanol fuel cell (DMFC) application. All prepared membranes were obtained by solution casting technique. Prepared membranes were systematically characterized in terms of water uptake, methanol uptake, and methanol permeability as membrane performance parameter for DMFC applications. Fourier transform infrared spectroscopy was used to confirm the structures of the CS/MMT-SSA composite electrolyte membranes. The addition of sulfosuccinic acid evidently decreased the value of methanol permeability with the lowest value of 2.9973 × 10-7 cm2/s was obtained from CS/MMT-SSA 16% membrane. The addition of sulfosuccinic acid also decreased the absorption of methanol with the lowest value of 45.9459% while the water absorption of 53.6424% occurred in the membrane with the addition of 16% sulfosuccinic acid. As a result, the CS/MMT-SSA composite membrane appears to be a potential candidate for the DMFC applications.Keywords: direct methanol fuel cell; proton exchange membrane; methanol permeability; chitosan

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