cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Dessy Ariyanti
Contact Email
dessy.ariyanti@che.undip.ac.id
Phone
+62247460058
Journal Mail Official
j.reaktor@che.undip.ac.id
Editorial Address
Department of Chemical Engineering, Diponegoro University Jl. Prof. Soedarto SH Tembalang Semarang 50275
Location
Kota semarang,
Jawa tengah
INDONESIA
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 19 No. 1 March 2019" : 5 Documents clear
Treatment Of Tofu Industry Wastewater Using Bioreactor Anaerobic-Aerobic And Bioball As Media With Variation Of Hidraulic Retention Time Ariani Dwi Astuti; Dewi Intania Ayu
Reaktor Volume 19 No. 1 March 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (544.39 KB) | DOI: 10.14710/reaktor.19.1.18-25

Abstract

Tofu which is made by grinding soy bean, generates huge amount of wastewater and thus considered as one of the most polluted food-industrial effluent owing to its high values of organic contents. The small industries of tofu preparation process release the wastewater directly into the water body without being treated first. Prior to discharge this wastewater into the waterbody, the wastewater must be treated to reduce the possibility of negative impact and the contamination of the waterbody. For these small industries, the best alternative of wastewater treatment is one which has the following criteria: easy in operation, low cost operation, low volumes of sludge produced, and can be used in high concentration wastewater. In this research, bioreactor anaerobic-aerobic with media bioball is used. The highest removal efficiency of COD took place in anaerobic zones. Bioreactors were operated with the variations of retention time at 24 hours, 18 hours, and 12 hours. The COD removal efficiency for Hydraulic Retention Time (HRT) of 24 hours, 18 hours and 12 hours were found 90.3% (organic loading rate is 15.1 kg COD/m3.day), 84.4% and 76.3% respectively. The experiment showed that the longer of the hydraulic retention time (HRT), the higher the removal efficiency could be achieved. These occurred because a longer HRT will extend the contact time between wastewater and microorganisms attached. Therefore, microorganisms have a longer time to degrade organic matter in wastewater. Although the removal efficiency in these three-HRT was found high, the effluent of the reactor was still above the effluent standard based on regulation of Ministry of Environmental Permen LH No. 5/2014. Kinetics using Eckenfelder Equation results R2 equal to 0.9991, n equal to 0.293 and K equivalent to 7.3577 mg/L. Keywords: tofu wastewater, anaerobe, aerobe, bioball, wastewater, treatment, attached growth
Investigating Mass Transfer Phenomena in Batch Solvent Extraction of Rice Bran Oil Lienda Aliwarga
Reaktor Volume 19 No. 1 March 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (616.825 KB) | DOI: 10.14710/reaktor.19.1.1-10

Abstract

In this study, we will point out the correlation of critical parameters in designing scale-up of process equipment for commercial rice bran oil extraction with different types of rice paddy, solvent, and physicochemical condition. Advantageously, this research was also intended to enhance the discoveries of novel sustainable production method for resilient agro-based food, energy, and chemical industries. In our experiment, the extraction of rice bran oil was organised in a batch agitated vessel and showed a profile of first order system. The most important factors which profoundly contributed towards the yield of rice bran oil from Saigon I and PadiBesar variety are temperature (T), impeller speed (N), ratio of bran to solvent (s/L), and ratio of impeller’s height-off bottom to tank diameter (h/d). For the mass transfer constant and the rate of extraction as consequence, factors that significantly influenced the correlation were temperature (T), impeller speed (N), ratio of impeller diameter to tank diameter (d/D), and ratio of impeller’s height-off bottom to tank diameter (h/d). For the dimensionless yield, generalised equation is provided with coefficient of determination 0.95, while that of the mass transfer equals to 0.63, reflecting the yield correlation to be more accurate in predicting further experimental results. These correlations are furthermore unique for different rice varieties, of which in this case belongs to Saigon I. Application for other rice species is relevant as by inserting additional correction factor which also exemplified in this research for PadiBesar. Keywords: rice bran oil; batch extraction; storage time; mass transfer, rate, yield
Growth Mechanism and Characterization of PbTe0.5Se0.5 Thin Films Used by Closed-Space Vapor Transport in a Vertical Reactor Yanuar Hamzah; Jimmy Copriady; Ariswan Ariswan
Reaktor Volume 19 No. 1 March 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (522.901 KB) | DOI: 10.14710/reaktor.19.1.11-17

Abstract

A simple method for growing thin film of semiconductor material PbTe0.5Se0.50 has been designed using the vapor transport (CSVT) method in a vertical reactor. The objectivity of this method is to study thin film growth formation due to chemical reactions during the deposition process in the reactor. In this study will describe some formations the vapor transport mechanism of PbTe0.5Se0.50 semiconductor material using iodine gas (I2) to accelerate the etching reaction on the substrate surface. Next, we will describe how the mechanism of the reaction in the reactor zone for growing thin films on the substrate. The thin films were characterized by structural, morphology properties and its composition. The film structure is a cubic structure with the maximum diffraction intensity at peak (222). The surface morphology of the thin film has a microcubes shape with a grain size~10 to 20 mm. Keywords: etching reaction; micro-cube; PbTe0.5Se0.50; close-spaced vapor transport
Effect of Esterification on Cassava Starch: Physicochemical Properties and Expansion Ability Siswo Sumardiono; Listiyana Riska; Bakti Jos; Isti Pudjiastuti
Reaktor Volume 19 No. 1 March 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.331 KB) | DOI: 10.14710/reaktor.19.1.34-41

Abstract

In this study, the characteristic of cassava starch have been developed through esterification reaction using ethyl lactate. Commercial cassava starch was modified by using (0.5; 0.75; 1.00; 1.25; 1.50 % v/v) ethyl lactate solution with pH 6, 7, 8, 9 for 15, 25, 35, 45, 55 minutes and the drained starch was dried with sun drying. The cassava starch which has been esterified with 1.5% ethyl lactate for 15 minutes pH 6 gave highest volume expansion of 2,438.9 %. For swelling power, the highest value was 19.32 swelling power at variable concentrations of 1.5% ester, esterification period of 15 minutes, and pH 6. The lowest amylose content was 15.68 % in ester concentration of 1.5 %. From the scanning electron micrograph, shows that the cassava starch after and before modification has not changed since the modifications performed under the gelatinization temperature. FTIR spectra of native cassava starch and ester cassava starch shown shift of the carboxyl group of starch from 1072.37 to 1087.80 cm-1 and a decrease in the OH group is from 3452.53 to 3417.81 cm-1. Bond formed indicates that the esterification reaction occurs between cassava starch with ethyl lactate esters. Keywords: volume expansion, cassava starch, ester starch, ethyle lactate, modified starch
Encapsulation of Soursop (Annona muricata Linn.) Leaf Tea Extract Using Natural Mucilage Melanie Cornelia; Kam Natania; Herry Cahyana; Edison Sutiyono
Reaktor Volume 19 No. 1 March 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.526 KB) | DOI: 10.14710/reaktor.19.1.26-33

Abstract

The bioactively rich soursop leaf extract can be encapsulated inside several natural coating materials. The extract of soursop leaf has been found to contain many bioactive compounds such as various phenolic compounds that are beneficial for anticancer, antidiabetic and many other health benefits. However due to the sensitive nature of the bioactive molecules, encapsulation procedure was applied to prolong the activity of the biomolecules. Capsule materials used in this experiment were obtained from natural extract of Okra mucilage, Aloe vera mucilage and Maltodextrin-WPI mixture to protect the unstable bioactive compounds. Homogenation time using ultrasonication and Core to Coating ratio was differed to observe the optimum encapsulation process. The encapsulation efficiency, release factor ability, size distribution and its correlation with bioactive stability are observed using Total Phenolic methods and Antioxidant Activity before and after encapsulation. Aloe vera gave best encapsulation efficiency (88-91%) while microcapsule made with Okra gave the best antioxidant activity (DPPH IC50 633-710ppm), and maltodextrin-WPI gave best powder recovery (yield 70-73%). Keywords: aloe mucilage, antioxidant activity,  encapsulation, okra mucilage, soursop tea extract

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2019 2019


Reset
Filter By Issues
All Issue Volume 25 No.1 April 2025 2025: Just Accepted and Article in Press Volume 24 No.3 December 2024 Volume 24 No.2 August 2024 Volume 24 No.1 April 2024 Volume 23 No.3 December 2023 Volume 23 No.2 August 2023 Volume 23 No.1 April 2023 Volume 22 No. 3 December 2022 Volume 22 No.2 August 2022 Volume 22 No. 1 April 2022 Volume 21 No.4 December 2021 Volume 21 No. 3 September 2021 Volume 21 No. 2 June 2021 Volume 21 No. 1 March 2021 Volume 20 No.4 December 2020 Volume 20 No.3 September 2020 Volume 20 No.2 June 2020 Volume 20 No.1 March 2020 Volume 19 No. 4 December 2019 Volume 19 No. 3 September 2019 Volume 19 No. 2 June 2019 Volume 19 No. 1 March 2019 Volume 18 No. 4 December 2018 Volume 18 No. 3 September 2018 Volume 18 No. 2 June 2018 Volume 18 No. 1 March 2018 Volume 17 No. 4 Desember 2017 Volume 17 No. 3 September 2017 Volume 17 No. 2 Juni 2017 Volume 17 No.1 Maret 2017 Volume 16 No.4 Desember 2016 Volume 16 No.3 September 2016 Volume 16 No. 2 Juni 2016 Volume 16 No.1 Maret 2016 Volume 15 No.4 Oktober 2015 Volume 15 No.3 April 2015 Volume 15, No.2, OKTOBER 2014 Volume 15, No.1, APRIL 2014 Volume 14, No. 4, OKTOBER 2013 Volume 14, No. 3, APRIL 2013 Volume 14, Nomor 2, Oktober 2012 Volume 14, Nomor 1, April 2012 Volume 13, Nomor 4, Desember 2011 Volume 13, Nomor 3, Juni 2011 Volume 13, Nomor 2, Desember 2010 Volume 13, Nomor 1, Juni 2010 Volume 12, Nomor 4, Desember 2009 Volume 12, Nomor 3, Juni 2009 Volume 12, Nomor 2, Desember 2008 Volume 12, Nomor 1, Juni 2008 Volume 11, Nomor 2, Desember 2007 Volume 11, Nomor 1, Juni 2007 Volume 10, Nomor 2, Desember 2006 Volume 10 No. 1 Juni 2006 Volume 09 No. 02 Desember 2005 Volume 09 No.1 Juni 2005 Volume 08 No.2 Desember 2004 Volume 08 No.1 Juni 2004 Volume 07 No.2 Desember 2003 Volume 07 No. 1 Juni 2003 Volume 6 No. 2 Desember 2002 Volume 6 No. 1 Juni 2002 Volume 5 No.2 Desember 2001 Volume 5 No. 1 Juni 2001 Volume 3 No.1 Desember 1999 More Issue