Article Per Year (5 Year)
p-Index From 2019 - 2024
2.195
P-Index
This Author published in this journals
All Journal Bulletin of Chemical Reaction Engineering & Catalysis CHEMPUBLISH JOURNAL UNEJ e-Proceeding JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya JMM (Jurnal Masyarakat Mandiri) Warta Pengabdian CHEESA: Chemical Engineering Research Articles Jurnal Teknologi Jurnal Pengabdian Kepada Masyarakat MEMBANGUN NEGERI Bulletin of Chemical Reaction Engineering & Catalysis
Helda Wika Amini
Prodi Teknik Kimia, Universitas Jember
Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Social Sciences Other

Published : 13 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 13 Documents
Search

 1   2 
Microwave-Assisted Hydrolysis Batang Tembakau untuk Produksi Gula Pereduksi sebagai Bahan Baku Bioetanol Bekti Palupi; Bimo Bayu Aji; Mizanurafi’ Ghifarhadi Prasiefa; Ditta Kharisma Yolanda Putri; Istiqomah Rahmawati; Boy Arief Fachri; Meta Fitri Rizkiana; Helda Wika Amini
Jurnal Teknologi Vol 10, No 2 (2023): Jurnal Teknologi
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/jtek.v10i2.225

Abstract

Tumbuhan tembakau yang diproduksi dengan skala besar di Indonesia ternyata memiliki problematika, yaitu limbah dari batangnya sekitar 2.000.000 ton yang tersedia setiap tahunnya dan belum dimanfaatkan. Batang tumbuhan secara umum mengandung lignin, selulosa, dan hemiselulosa, termasuk batang tembakau yang menjadi limbah. Kandungan lignin terlebih dahulu dihilangkan dengan proses pretreatment basa sebelum hidrolisis. Proses hidrolisis yang menggunakan microwave-assisted dengan basa akan mengkonversi selulosa dan hemiselulosa menjadi gula pereduksi yang selanjutnya difermentasi untuk memperoleh bioetanol. Proses hidrolisis dalam penelitian ini menggunakan 3 gram serbuk batang tembakau yang sudah dipretreatment dan dicampurkan dengan larutan natrium hidroksida (NaOH) dengan rentang konsentrasi 2 - 5%. Selanjutnya diproses menggunakan microwave untuk diiradiasi dengan daya 250 - 350 watt selama 5 - 15 menit. Penelitian ini menggunakan Software Design Expert yang disesuaikan dari pendekatan Response Surface Methodology (RSM) serta model Central Composite Design (CCD) sehingga didapatkan 20 kali running pada penelitian ini. Hasil gula pereduksi paling tinggi sebesar 7,40 mg/mL didapatkan pada percobaan ke-17 dengan konsentrasi larutan NaOH 2%, daya microwave 350 watt, dan selama 15 menit.
Optimization of Ulva sp. Decomposition using H2SO4 with Microwave-Assisted Hydrolysis Method as Feedstock of Bioethanol Bekti Palupi; Muhammad Rizalluddin; Kiki Septianti; Istiqomah Rahmawati; Boy Arief Fachri; Meta Fitri Rizkiana; Helda Wika Amini
CHEESA: Chemical Engineering Research Articles Vol 6, No 1 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i1.14682.13-25

Abstract

Bioethanol is a renewable energy used to reduce dependence on fossil fuels, which have negative impacts on the environment. Furthermore, Ulva sp. contains high levels of carbohydrates, making it potentially suitable as a raw material for bioethanol production. Therefore, this study aims to determine the optimal decomposition process using the microwave-assisted hydrolysis method with an acid solvent (H2SO4), by examining the effects of acid concentration, hydrolysis time, and microwave power. Optimization was carried out using several parameters such as hydrolysis time, microwave power, and the ratio of raw materials to solvents. The ANOVA test results showed that the hydrolysis variable parameter had a significant effect on the reducing sugar content obtained, evidenced by the R2 value of 0.9892. The highest reducing sugar content of 19.71 mg/mL was produced under the operating conditions of 15 min hydrolysis time, 450 W microwave power, and 0.065 g/mL ratio of raw material to solvents.
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 Afidatul Muadifah Ari Susanti Atiqa Rahmawati Bekti Palupi Bimo Bayu Aji Boy Arief Fachri Dini Rahmawaty Ditta Kharisma Yolanda Putri Ditta Kharisma Yolanda Putri Dyah Ayu Savitri Felix Arie Setiawan Gregah Pangayoman Hartanto P Hanggara Sudrajat Husnatun Nihayah Indra Lasmana Tarigan Istiqomah Rahmawati Kiki Septianti Meta Fitri Rizkiana Mizanurafi’ Ghifarhadi Prasiefa Muhammad Reza Muhammad Rizalluddin Muharja, Maktum Nikita Meidi Nurtsulutsiyah Nurtsulutsiyah Nurul Ulya Luthfiyana Rizki Fitria Darmayanti Syarifah, Ratna Dewi Tri Kurnia Astutik Wiwik Pratiwi Yakub Hendrikson Manurung