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All Journal Bulletin of Chemical Reaction Engineering & Catalysis UNEJ e-Proceeding Bulletin of Chemical Reaction Engineering & Catalysis
Ditta Kharisma Yolanda Putri
Department Of Chemical Engineering, Faculty Of Engineering, University Of Jember, Kalimantan 37 Jember 68121
Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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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). 
The EFFECT OF INGREDIENTS PRETREATMENT ON ESSENTIAL OIL EXTRACTION FROM LEAVES OF CINTRONELLA WITH SOLVENT-FREE MICROWAVE EXTRACTION METHOD: STUDY OF PHYSICAL CHARACTERISTICS Ditta Kharisma Yolanda Putri; Safira Nur Oktavia; Boy Arief Fachri
UNEJ e-Proceeding 2022: E-Prosiding Kolokium Hasil Penelitian dan Pengabdian kepada Masyarakat
Publisher : UPT Penerbitan Universitas Jember

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Abstract

The objective of this study was to determine the effect of material pretreatment on the extraction process using the solvent-free microwave extraction method with the pretreatment of the material being air-dried for 48 hours at room temperature of 25-28OC. Other pretreatment was done by cutting the size of the material, namely 1 cm, 3 cm, and 5 cm. This research was conducted using a microwave with a power of 300 watts, 450 watts, and 600 watts. The extraction times used were 30 minutes, 60 minutes, and 90 minutes. Physical characteristics were tested by observing color, specific gravity, and solubility in 80% ethanol. The results obtained in this study by pretreatment of materials with the drying method in the wind - aerated have a significant effect on the yield of essential oils produced, the highest yield obtained is 2.106% compared to fresh ingredients with the same operating conditions fresh ingredients produce only produces the highest yield of 1.406%. The results of the physical characteristics test of color, specific gravity, and solubility in 80% ethanol on both materials have met the standard of SNI 06-3953-1995, but there is no significant difference. The optimal operating conditions in this study were when the power was 450 watts with a material size of 3 cm, and an operating time of 90 minutes for materials that were pretreated using the wind-air method or with fresh ingredients. Keywords: Solvent-free microwave extraction, pretreatment, physical characteristics.
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 : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

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). 
Co-Authors Ari Susanti Atiqa Rahmawati Bekti Palupi Boy Arief Fachri Felix Arie Setiawan Helda Wika Amini Istiqomah Rahmawati Meta Fitri Rizkiana Muharja, Maktum Rizki Fitria Darmayanti Safira Nur Oktavia