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All Journal International Journal of Renewable Energy Development Jurnal Sains dan Teknologi Bulletin of Chemical Reaction Engineering & Catalysis REKAYASA JMM (Jurnal Masyarakat Mandiri) Warta Pengabdian CHEESA: Chemical Engineering Research Articles Jurnal Pengabdian Kepada Masyarakat MEMBANGUN NEGERI Jurnal Penelitian IPTEKS Unri Conference Series: Community Engagement Journal of Biobased Chemicals (JOBC) Jurnal Teknik Kimia dan Lingkungan Bulletin of Chemical Reaction Engineering & Catalysis
Rizki Fitria Darmayanti
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Jember
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences Other

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Journal : Bulletin of Chemical Reaction Engineering

 1 
Effect of Severity Factor on the Subcritical Water and Enzymatic Hydrolysis of Coconut Husk for Reducing Sugar Production Maktum Muharja; Nur Fadhilah; Rizki Fitria Darmayanti; Hanny Frans Sangian; Tantular Nurtono; Arief Widjaja
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 3 Year 2020 (December 2020)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.3.8870.786-797

Abstract

Preventing the further degradation of monomeric or oligomeric sugar into by-product during biomass conversion is one of the challenges for fermentable sugar production. In this study, the performance of subcritical water (SCW) and enzymatic hydrolysis of coconut husk toward reducing sugar production was investigated using a severity factor (SF) approach. Furthermore, the optimal condition of SCW was optimized using response surface methodology (RSM), where the composition changes of lignocellulose and sugar yield as responses. From the results, at low SF of SCW, sugar yield escalated as increasing SF value. In the enzymatic hydrolysis process, the effect of SCW pressure is a significant factor enhancing sugar yield. A maximum total sugar yield was attained on the mild SF condition of 2.86. From this work, it was known that the SF approach is sufficient parameter to evaluate the SCW and enzymatic hydrolysis of coconut husk. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Optimization of Microwave-Assisted Alkali Pretreatment for Enhancement of Delignification Process of Cocoa Pod Husk Maktum Muharja; Rizki Fitria Darmayanti; Bekti Palupi; Istiqomah Rahmawati; Boy Arief Fachri; Felix Arie Setiawan; Helda Wika Amini; Meta Fitri Rizkiana; Atiqa Rahmawati; Ari Susanti; Ditta Kharisma Yolanda Putri
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 1 Year 2021 (March 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.1.8872.31-43

Abstract

In this study, the optimization of microwave-assisted alkaline (MAA) pretreatment is performed to attain the optimal operating parameters for the delignification of cocoa pod husk (CPH). The MAA performance was examined by heating the CPH solid with different particle sizes (60–120 mesh) and NaOH solution with a different sample to a solvent (SS) ratio (0.02–0.05 g/L), for short irradiation time (1–4 min). Box-Behnken Design (BBD) was utilized to optimize the percentage of lignocellulose composition changes. The results show that by enlarging particle size, the content of lignin and cellulose decreased while hemicellulose increased. By prolong irradiation time, the content of lignin and hemicellulose decreased while cellulose elevated. On the other hand, increasing the SS ratio was not significant for hemicellulose content changes. From FTIR and SEM characterization, the MAA drove the removal of lignin and hemicellulose of CPH and increased cellulose slightly. Supported by kinetic study which conducted in this work, it was exhibited that MAA pretreatment technology is an effective delignification method of CPH which can tackle the bottleneck of its commercial biofuel production. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Subcritical Water Process for Reducing Sugar Production from Biomass: Optimization and Kinetics Maktum Muharja; Arief Widjaja; Rizki Fitria Darmayanti; Nur Fadhilah; Bramantyo Airlangga; Abdul Halim; Siska Nuri Fadilah; I Made Arimbawa
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 4 Year 2022 (December 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.4.16527.839-849

Abstract

The competitive reactions of lignocellulose hydrolysis and monosaccharide degradation in the subcritical water (SCW) hydrolysis of coconut husk were investigated to optimize the reducing sugar yield. Optimization analysis was performed by response surface methodology (RSM) and kinetics studies. Parameters of process optimization were varied at 130-170 °C for 15-45 min. The reducing sugars were measured using the Dinitro salicylic acid method. The sugar yield increased when the temperature increased from 130 °C to 170 °C. The highest reduction sugar yield of 4.946 g/L was obtained at 183.6 °C for 4.8 min and 23.4 liquid/solid ratio (LSR). Kinetics studies were carried out at temperature variations of 150, 170, and 190 °C and pressures of 60, 80, and 100 bar for 5 to 60 min. The yield of reducing sugar decreased with increasing temperature. The kinetic model 2B is the best method to explain the competitive reaction kinetics of coconut husk hydrolysis. This research is an innovation to increase the reducing sugar to make the process more commercially viable. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Co-Authors Abdul Halim Achmad Chumaidi, Achmad Achri Isnan Khamil Adelia Rosalina Ari Susanti Ari Susanti Arief Widjaja Aswie, Viqhi Atiqa Rahmawati Ayu Salsabila, Putri Batuthoh, M. Wildan Ibnu Bekti Palupi Boy Arief Fachri Bramantyo Airlangga Daniel Happy Putra Diana Fitriati Ditta Kharisma Yolanda Putri Dyah Ayu Savitri Fadilah, Siska Nuri Felix Arie Setiawan Filial Ahliana Rahmaniyah Firmansyah, Arfian Alwi Hanggara Sudrajat Hanny F. Sangian Helda Wika Amini Helda Wika Amini Hesti Lipuring Tyas Hidayatullah Hidayatullah I Made Arimbawa I Made Arimbawa Ilham Alamsah Ilham Alamsyah Irfin, Zakijah Istiqomah Rahmawati Karima, Nur Kenji Sakai Kenji Sonomoto KENJI SONOMOTO Khamil, Achri Isnan Meta Fitri Rizkiana Ming Gao Mohammad Abdul Aziz Fajar Mohammad Nashir Idham Kholid Mohammad Nazarudin Ali Muharja, Maktum Munawaroh, Faizzatul Nur Fadhilah Nur Fadhilah Nur Fadhilah Nuraini, Nanda Febia Nurtsulutsiyah Nurtsulutsiyah Pratami, Melyta Rizky Ramadhani, Salsabila Amania Rekha Aliyya Isma Sakai, Kenji Sanomoto, Kenji Shofia Khoirunissa, Dita Siska Nuri Fadilah Siska Nuri Fadilah Siska Nuri Fadilah Sjarief Widjaja Susilowati Susilowati Tantular Nurtono Tao Zhao Tashiro, Yukihiro Tri Dwinanda Nursoliha Tri Widjaja Yakub Hendrikson Manurung Yakub Hendrikson Manurung Yukihiro Tashiro Zakia Ainun Salsabila Zikrillah, M.