Article Per Year (5 Year)
p-Index From 2021 - 2026
5.749
P-Index
This Author published in this journals
All Journal Jurnal Rekayasa Proses Jurnal Ilmu Lingkungan Jurnal Teknik ITS IPTEK The Journal for Technology and Science Jurnal Sains dan Teknologi REKAYASA JMM (Jurnal Masyarakat Mandiri) CHEESA: Chemical Engineering Research Articles Jurnal Rekayasa Proses Jurnal Teknologi Jurnal Pengabdian Kepada Masyarakat MEMBANGUN NEGERI Jurnal Penelitian IPTEKS TheJournalish: Social and Government Distilat: Jurnal Teknologi Separasi Unri Conference Series: Community Engagement Journal of Biobased Chemicals (JOBC) Sewagati Jurnal Teknik Kimia dan Lingkungan Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses JURNAL REKAYASA KIMIA & LINGKUNGAN Dinamika Kerajinan dan Batik: Majalah Ilmiah
Muharja, Maktum
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Jember, Jalan Kalimantan 37, Jember 68121
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Public Health Social Sciences Other

Published : 37 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 37 Documents
Search

 1   2   3   4 
Techno-Economic Analysis of Extractive Butanol Fermentation by Immobilized Cells with Large Extractant Volume Darmayanti, Rizki Fitria; Muharja, Maktum; Zhao, Tao; Gao, Ming; Tashiro, Yukihiro; Sakai, Kenji; Sonomoto, Kenji
Jurnal Teknik Kimia dan Lingkungan Vol. 6 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (717.755 KB) | DOI: 10.33795/jtkl.v6i2.337

Abstract

There are several challenges for ABE fermentation to be used in an industrial scale including the low of butanol yield, the high energy requirement for separation and purification, and the competeness of sugar with food demand as substrat. In this study, techno-economical aspects of ABE fermentation by using immobilized cells with large extractant volume were studied. Overall production process was designed using rice straw as raw material which is semi-hydrolyzed to produce cellobiose, glucose, xylose, and arabinose mixture. Concentrated sugar was then fed to extractive fed-batch fermentation using immobilized cells. Finally, extractant was recovered and products were purified by distillation column. By evaluating this process design for the small scale capacity of 238 kg-butanol and acetone/day, the energy requirement was 41.3 MJ/kg-butanol and acetone and the cost was 1.91 $/kg-butanol and acetone. Although the cost was higher than butanol produced by petrochemical process of 1.08 $/kg-butanol, it may reduce if the scale is increased.
Techno-Economic Analysis of Biogas Production from Cow Manure Muharja, Maktum; Khotimah, Husnul; Rizki Fitria , Darmayanti; Andika, Prastika; Achri Isnan, Khamil; Badril, Azhar
Jurnal Teknik Kimia dan Lingkungan Vol. 8 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtkl.v8i1.3335

Abstract

Biogas has been considered as a renewable alternative energy produced by anaerobic digestion of cow manure. A process of anaerobic digestion of cow manure was simulated by Aspen Plus software to analyze the cost of production. The simulated project used cow manure wastes as a feedstock. From the study, economic analysis includes Net Present Value (NPV), Internal Rate of Return (IRR), Payback period (PBP), and B/C Ratio. The resulting BEP value is 539.20, the NPV is 6,414,566,421.98, the IRR is 249.84%, and the B/C ratio is 1.66. These values can be said that the business of cow dung which is processed into biogas is feasible to run.
Fish-scale inspired superoleophobic membrane from cellulose: A Review Halim, Abdul; Ismayati, Maya; Gabriel, Azmi Alvian; Ihsanpuro, Surya Iryana; Medy, Nabil Septian; Muharja, Maktum; Enomae, Toshiharu
Jurnal Rekayasa Kimia & Lingkungan Vol 18, No 1 (2023): Jurnal Rekayasa Kimia & Lingkungan (June, 2023 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v18i1.26920

Abstract

Nature-inspired technology has been investigated widely. Anti biofouling properties of fish scale has inpired to improve membrane performance. Biofouling affects an oil-water separation membrane. The bacterial, coagulant, and hydrophobic oils attach to the membrane surface, demanding periodic cleaning. To overcome the problems, surface modification materials are introduced namely superoleophobic surface. The superoleophobic surface promises antifouling, high flux, and high separation efficiency. Superoleophobic surfaces are inspired by the scales on fish that form a hydrogel-like layer on their surface. The hydrogel repels oil and any organic materials, keeping the surface clean. The hydrogel of fish scales can be mimicked by cellulose-based materials. A dense layer of hydroxyl groups absorbs a lot of water and forms a hydrogel bond. The membrane with the cellulose hydrogel-like structure will perform a superoleophobic characteristic surface. The characteristic can be utilized as a functional membrane for oil-water separation. This article reviews the principle, mechanism, current development, and future challenges of bioinspired superoleophobic surfaces from cellulose-based materials for membrane applications.
PENGARUH PERENDAMAN, WAKTU DAN KETEBALAN PADA PENGERINGAN JAHE PUTIH (Zingiber officinale var. Amarum) MENGGUNKAN TRAY DYER DAN SOLAR DRYER Wardhani, Maharani Tri; Fadilah, Siska Nuri; Prastika, Andika; Arimbawa, I Made; Khamil, Achri Isnan; Darmayanti, Rizki Fitria; Muharja, Maktum
DISTILAT: Jurnal Teknologi Separasi Vol. 9 No. 1 (2023): March 2023
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v9i1.503

Abstract

Jahe merupakan salah satu rempah-rempah dengan tingkat produksi tertinggi di Indonesia. Jahe termasuk bahan yang mudah rusak dan tidak tahan lama, salah satu cara pengolahan jahe adalah dengan metode pengeringan untuk menjaga kualitas jahe. Penelitian ini bertujuan untuk mengetahui pengaruh perendaman terhadap kadar air, pengaruh waktu dan dimensi ketebalan jahe terhadap laju pengeringan. Metode yang digunakan adalah metode pengeringan tray dryer dan pengeringan konvensional menggunakan sinar matahari (solar drying). Penelitian ini menggunakan variabel waktu perendaman 10, 15, 20, 25 jam, waktu pengeringan 60, 90, 120 dan 150 menit serta variabel ketebalan bahan 2, 4, 6, dan 8 mm. Hasil penelitian menunjukkan kadar air terendah sebesar 1.0785 g didapatkan saat perendaman 25 jam. Laju pengeringan optimum menggunakan tray dryer sebesar 0,433 g/menit pada waktu 60 menit dan ketebalan 2 mm. Laju pengeringan optimum menggunakan solar dryer didapatkan saat pengeringan selama 90 menit yaitu 0,167 g/menit dan ketebalan 2 mm sebesar 0,133 g/menit. Kualitas pengeringan menggunakan tray dryer lebih baik jika dibandingkan dengan solar dryer ditinjau dari warna dan tingkat kekeringan jahe. Dengan demikian, metode ini dapat menjadi solusi untuk mengoptimalkan proses pengeringan jahe secara efisien.
Kinetic Study of the Aluminum–water Reaction Using NaOH/NaAlO2 Catalyst for Hydrogen Production from Aluminum Cans Waste Fadhilah, Nur; Muharja, Maktum; Risanti, Doty Dewi; Wahyuono, Ruri Agung; Satrio, Dendy; Khamil, Achri Isnan; Fadilah, Siska Nuri
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 4 Year 2023 (December 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20041

Abstract

The presence of oxide layers covering the surface of aluminum is known to impede the hydrogen production reaction. These oxide layers can be broken by adding catalysts and increasing the aluminum-water reaction temperature. Common catalysts used are alkaline catalysts that are capable of achieving high hydrogen production rates in a short time at lower temperatures, while intermediate temperatures of above 50 °C can accelerate the hydration reaction of the oxide layer. Herein, the mixture of NaOH and NaAlO2 catalysts was employed to attain a stable NaAlO2 solution and continuous reaction of NaOH and aluminum. This research analyzes the influence of temperature between 32 and 80 °C on the aluminum, 0.3 M NaOH and 0.001 M NaAlO2 catalysts solution at atmospheric pressure. All solutions produces a similar hydrogen yields and rate. Solutions containing NaAlO2 indicate reverse reaction that surpressing the Al(OH)3 precipitation. Residue from the reaction is investigated using X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), and Scanning Electron Microscope (SEM). The volume of hydrogen produced is evaluated using a mathematical mass reduction and shrinking core model. The rate of hydrogen production depends largely on the aqueous solution's temperature, with an activation energy of 47.4 kJ/mol. Based on the findings, it is readily apparent that the reaction only produced gibbsite and bayerite, with gibbsite and bayerite being dominant at 32–70 °C and 80 °C, respectively. The mass reduction model fits well with the present results with only an average 5.1 mL deviation, whereas the shrinking core model generally tends to result in underestimated values with an average deviation of 23.9 mL. Copyright © 2023 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). 
Pemanfaatan Ulva sp. pada Sistem High Rate Algae Reactor (HRAR) untuk Pengolahan Limbah Cair Batik Palupi, Bekti; Megasari, Tri Elok Setya; Adelina, Saltsabita Nourin; Fachri, Boy Arief; Rahmawati, Istiqomah; Rizkiana, Meta Fitri; Amini, Helda Wika; Muharja, Maktum; Mumtazah, Zuhriah
Dinamika Kerajinan dan Batik: Majalah Ilmiah Vol. 41 No. 2 (2024): DINAMIKA KERAJINAN DAN BATIK : MAJALAH ILMIAH
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Industri Kerajinan dan Batik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22322/dkb.v41i2.8466

Abstract

Batik merupakan salah satu warisan budaya Indonesia. Dalam produksinya, batik menggunakan bahan pewarna, malam, dan zat-zat kimia lainnya. Penggunaan bahan tersebut menghasilkan limbah cair dengan kandungan kadar minyak dan lemak, COD, dan pH yang tinggi. Selain itu, limbah yang dibuang langsung ke lingkungan merupakan limbah yang beracun dan dapat merusak ekosistem. Metode High Rate Algae Reactor (HRAR) menggunakan Ulva sp. digunakan pada penelitian ini. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi tablet CO2, lama penyinaran, dan banyaknya suspensi Ulva sp. dalam pengolahan limbah. Ulva sp. sebanyak 5 – 15% dimasukkan ke dalam HRAR bersamaan dengan limbah cair batik, kemudian dilakukan penambahan tablet CO2 sebanyak 0,27 – 0,81 gram yang selanjutnya dilakukan penyinaran selama 6 – 24 jam. Optimasi pengolahan limbah dilakukan menggunakan metode RSM (Response Surface Methodology) dengan rancangan percobaan kombinasi perlakuan Central Composite Design (CCD) menggunakan software Design Expert 13. Berdasarkan hasil penelitian, variabel pengolahan limbah paling optimal berada pada saat konsentrasi suspensi Ulva sp. 5%, lama penyinaran 24 jam, dan massa tablet CO2 sebesar 0,27 gram. Respon yang diperoleh pada variabel tersebut yakni kadar COD 48,2 mg/L, kadar minyak dan lemak 0,432 mg/L, serta nilai pH 7,929.
Enhancing Enzymatic Digestibility and Lignin Production of Oil Palm Empty Fruit Bunch (OPEFB) by Green Deep Eutectic Solvent Wijaya, Candra; Pertiwi, Urania Noor Lintang; Apol, Tabina Raissa; Rohmah, Ika Putri Nikmatur; Muharja, Maktum; Widjaja, Tri; Riadi, Lieke; Widjaja, Arief
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20526

Abstract

Oil palm empty fruit bunch (OPEFB) is an abundant lignocellulosic residue whose high lignin content restricts its bioconversion into sugars and value-added products. Deep eutectic solvents (DESs), particularly choline chloride–lactic acid, offer a green and tunable platform for selective delignification and biomass fractionation. This study investigates the effects of ChCl:LA (1:2) DES pretreatment under varying temperatures (100–140 °C) and reaction times (3-6 h) on the chemical composition, structural modification, delignification kinetics, and enzymatic digestibility of OPEFB. A modified combined delignification factor (CDF) was developed to unify temperature, time, and DES acidity into a single severity descriptor. Delignification followed a biphasic pattern successfully captured by the CDF-based kinetic model (R² = 0.9961), with activation energy of 63.5 kJ.mol⁻¹. Increasing pretreatment severity enhanced hemicellulose and lignin removal (up to 95.5% and 84.4%), while cellulose remained largely preserved. SEM, XRD, and FTIR analyses confirmed progressive disruption of the lignin–carbohydrate matrix, increased cellulose exposure, and removal of amorphous domains. As a result, enzymatic hydrolysis yield improved by more than twofold relative to untreated biomass, reaching 75.5% at 140 °C for 6 h. Mass-balance evaluation demonstrated that from 100 g OPEFB, DES pretreatment yielded 21.6 g glucose and 24.7 g recoverable lignin under optimal conditions. Compared to other pretreatment strategies, the ChCl:LA DES system achieved a balanced co-production of sugars and lignin in significantly shorter processing time. Overall, this work provides mechanistic, kinetic, and mass-balance insights into DES-assisted fractionation of OPEFB and highlights its potential in integrated multiproduct biorefineries. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors A Halim Abdul Halim Achmad Chumaidi, Achmad Achri Isnan Khamil Achri Isnan, Khamil Adelia Rosalina Adelina, Saltsabita Nourin Afrila Tutut Dwijati Lestari Agra Bachtiar Andika Prastika Andika, Prastika Apol, Tabina Raissa Ari Susanti Arief Widjaja Arshy, David Permana Aswie, Viqhi Atiqa Rahmawati Atiqa Rahmawati Ayu Salsabila, Putri Azmi Alvian Gabriel Badril Azhar Badril, Azhar Batuthoh, M. Wildan Ibnu Bekti Palupi Bima Suci, Syeikh Maulana Boy Arief Fachri Bramantyo Airlangga Candra Wijaya, Candra Daniel Happy Putra Diana Fitriati Difka Augustina Diana Sari Dimas Nur Herdianto Ditta Kharisma Yolanda Ditta Kharisma Yolanda Putri Doty Dewi Risanti Dwina Moentamaria Dyah Ayu Savitri Dyah Sawitri Dyah Sawitri Enomae, Toshiharu Fadilah, Siska Nuri Felix Arie Setiawan Filial Ahliana Rahmaniyah Firmansyah, Arfian Alwi Hakiki, Rizki Maulana Hanggara Sudrajat Hanny F. Sangian Helda Wika Amini Helda Wika Amini Helgananta Adirya Sabian Heni Pujiastuti Hesti Lipuring Tyas Hidayatullah Hidayatullah Husnul Khotimah Husnul Khotimah I Made Arimbawa I Made Arimbawa I Made Arimbawa Ihsanpuro, Surya Iryana Ilham Alamsah Ilham Alamsyah Indrayani, Lilin Irdatus Sholeha Irfan Albana Irfin, Zakijah Ismayati, Maya Istiqomah Rahmawati Jayyid Zuhdan Jihan Nafila Wibowo Karima, Nur Kenji Sakai Kenji Sonomoto KENJI SONOMOTO Khamil, Achri Isnan Khotimah , Husnul Lestari, Afrila Tutut Dwijati Lieke Riadi Lizda Johar Mawarani M. Zikrillah Maharani, Regita Gustiayu Pramisti Mahfud Mahfud Medy, Nabil Septian Megasari, Tri Elok Setya Meta Fitri Rizkiana Ming Gao Ming Gao Mohammad Abdul Aziz Fajar Mohammad Nashir Idham Kholid Mohammad Nazarudin Ali Muhammad Rizalluddin Mutiara Rengganis Nurul Putri Azhari Nailufhar , Lili Niki Etruly Nova Chintya Kurniawati Nugroho, Imam Wahyu Beny Nur Fadhilah Nur Fadhilah Nur Fadhilah Nur Fadhilah Nur Karima Nurtsulutsiyah Nurtsulutsiyah Pertiwi, Urania Noor Lintang Prastika, Andika Ramadana, Ifan Ramadhani, Salsabila Amania Rekha Aliyya Isma Rizki Fitria , Darmayanti Rizki Fitria Darmayanti Rizki Fitria Darmayanti Rohmah, Ika Putri Nikmatur Ruri Agung Wahyuono Sakai, Kenji Salsabila, Putri Ayu Sangadji, Ningsi Lick Satrio, Dendy Shofia Khoirunissa, Dita Sholeha, Irdatus Siska Nuri Fadilah Siska Nuri Fadilah Siska Nuri Fadilah Siska Nuri Fadilah Sjarief Widjaja Susilowati Susilowati Tantular Nurtono Tao Zhao Tao Zhao Tashiro, Yukihiro Tri Dwinanda Nursoliha Tri Widjaja Tyas , Hesti Lipuring Wardani, Salza Belila Kusuma Wardhani, Maharani Tri Wibowo, Jihan Nafila Yakub Hendrikson Manurung Yakub Hendrikson Manurung Yolanda Putri, Ditta Kharisma Yukihiro Tashiro Zakia Ainun Salsabila Zikrillah, M. Zuhriah Mumtazah