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All Journal Jurnal Rekayasa Proses PROSIDING SEMINAR NASIONAL Reaktor International Journal of Renewable Energy Development TEKNIK METANA JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Bahan Alam Terbarukan Seminar Nasional Teknik Kimia Kejuangan Jurnal Rekayasa Mesin Panrita Abdi - Jurnal Pengabdian pada Masyarakat Emerging Science Journal Communications in Science and Technology Jurnal Rekayasa Proses Jurnal Inovasi Teknik Kimia ASEAN Journal of Chemical Engineering Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Warta Perkaretan Jurnal Profesi Insinyur Indonesia International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Bahan Alam Terbarukan
Andri Cahyo Kumoro
Department Of Chemical Engineering, Faculty Of Engineering, Diponegoro University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Current Trend of MOFs Incorporated Membranes for Advanced Wastewater Treatment Utomo, Dani Puji; Kusworo, Tutuk Djoko; Kumoro, Andri Cahyo; Budiyono, Budiyono; Kurniawan, Tonni Agustiono
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.83845

Abstract

Membrane technology has gained attention in wastewater treatment due to its great potential for producing high-grade water products for reuse. The membrane also effectively removes persistent pollutants in water effluent. However, their application is constrained by low productivity due to fouling formation. Incorporating functionalized nanoparticles into polymeric membranes has attracted much attention due to the improved membrane performance and additional features. Metal-organic frameworks (MOFs) incorporated into polymeric membranes have been widely applied in reverse osmosis (RO), forward osmosis (FO), nanofiltration (NF), and microfiltration (MF) for water and wastewater treatment. This short review presented recent findings, fabrication methods, and a systematic understanding of transport mechanisms under various operating conditions. This study also focused on several important parameters, such as improving physicochemical properties, membrane features, and performance enhancement in wastewater treatment. The reported studies show that MOFs incorporated membranes have reached >95% organic pollutants and 100% suspended solids. The membrane durability was also enhanced up to 140%, and the flux recovery can be maintained at 98% after several cycles. Even some MOFs, such as ZIF-8 and UiO-66, exhibited excellent performance in harsh conditions (pH < 4). The prospects and challenges of MOFs-incorporated membranes in industrial applications were also provided in this study.
Anaerobic Fermentation of Mixed Fruits Peel Waste for Functional Enzymes Production Employing Palm Sugar and Molasses as The Carbon Source Retnowati, Diah Susetyo; Kumoro, Andri Cahyo; Haryani, Kristinah
Reaktor Volume 23 No.2 August 2023
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.23.2.71-76

Abstract

The daily abundant generation of fruit peel waste potentially triggers environmental problems if no appropriate management is performed. Besides, fruit peel waste can be a valuable source for functional enzyme production. This study aims to investigate the use of molasses and palm sugar as sugar source during anaerobic fermentation of banana and papaya peel waste to produce functional enzymes. The fermentation was subjected to biomass at various banana peels to papaya peels mass ratio for 3 months. The feed consisted of sugar:biomass:water, and their mass ratio was kept constant at 1:3:10. Both brown functional enzyme cocktails obtained from the fermentation using palm sugar and molasses as carbon source were acidic with pH of 3.7 and 4.4, respectively. The amylase, protease, and lipase activities of the functional enzyme cocktails was maximum when the biomass mixture contained four portions of banana peel and one portion of papaya peel. In addition, molasses was found to be the better sugar source than palm sugar for producing functional enzymes from aerobic fermentation peel fruits comprises banana and papaya peels. This study proved that fruit peel waste can be converted to valuable functional enzymes as one of the solutions of fruit peel waste management Keywords: anaerobic fermentation; carbon source; enzyme activity; functional enzyme; organic waste
Impact of crosslinking on quaternary ammonium poly(vinyl alcohol)/polyquaternium-7 anion exchange membranes for alkaline polymer electrolyte fuel cells Samsudin, Asep Muhamad; Rokhati, Nur; Prasetya, Nor Basid Adiwibawa; Kumoro, Andri Cahyo; Anggoro, Didi Dwi; Nasher, Kharissa; Wahyudi, Dhiky; Roschger, Michaela; Hacker, Viktor
International Journal of Renewable Energy Development Vol 14, No 4 (2025): July 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60897

Abstract

Alkaline Polymer Electrolyte Fuel Cells (APEFCs) have emerged as a promising candidate for clean energy production. Anion exchange membrane (AEM) is an essential element of alkaline polymer electrolyte fuel cells for its role in facilitating hydroxide ion conduction. The objective of this study is to investigate the effect of a glutaraldehyde-based crosslinker solution on the performance of anion exchange membranes (AEMs) fabricated using quaternary ammonium poly (vinyl alcohol) (QPVA) as the backbone polymer and polyquaternium-7 as the second polymer. The introduction of a glutaraldehyde-based crosslinking agent was purposed to enhance membrane stability and reduce excessive swelling. The study evaluates the impact of varying glutaraldehyde concentrations on membrane performance. FTIR analysis confirms the presence of key functional groups of QPVA, polyquaternium-7, and the crosslinking agent. SEM images reveal that the membranes demonstrate dense and homogeneous physical structure. The results show that water uptake, swelling degree, ion exchange capacity (IEC), and hydroxide conductivity are influenced by the concentration of the glutaraldehyde solution. The QP-GA-13 AEM exhibited the best overall performance, achieving the highest tensile strength of 31.1 MPa and the highest hydroxide ion conductivity of 4.15 mS cm⁻¹ at 70°C. In single-cell tests, this membrane delivered a maximum power density of 85 mW cm⁻² and a current density of 350 mA cm⁻² at 80°C under humidified oxygen conditions.
Penerapan Teknologi Internet of Things dalam Meningkatkan Efisiensi Konsumsi Bahan Bakar pada Perusahaan Truk Pengangkut Logistik Pamungkas, Prihantoro; Silviana, Silviana; Kumoro, Andri Cahyo
Jurnal Profesi Insinyur Indonesia Vol 3, No 2 (2025): JPII
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2025.26843

Abstract

Persaingan yang sangat ketat pada perusahaan bidang transportasi logistik menuntut perlunya penggunaan bahan bakar yang efisien karena hal tersebut sangat berperan dalam mengendalikan biaya operasional, mengurangi dampak lingkungan dan menjaga agar perusahaan tetap kompetitif. Dalam era revolusi industri 4.0 beberapa tahun terakhir, pertumbuhan drastis pada perangkat yang terhubung dengan internet telah mengubah cara orang dan bisnis dalam berinteraksi. Perangkat yang terhubung dengan internet yang dikenal sebagai Internet of Things (IoT) sudah diterapkan pada kendaraan, termasuk kendaraan truk. Sebuah perangkat telematika yang terhubung dengan micro controller dapat menjadi gateway bagi kumpulan data yang dikirim menuju ke server. Pengembangan ini berpusat pada perancangan sebuah sistem monitoring kendaraan truk pengangkut logistik dengan menggunakan sebuah perangkat telematika yang terhubung dengan engine control unit (ECU) untuk mengirimkan data menuju ke layer dashboard komputer pribadi atau telepon mudah alih berbasis android. Informasi yang terkumpul dapat menunjukkan data jumlah konsumsi bahan bakar truk tersebut dengan akurat sesuai dengan perubahan waktu nyata. Dari pengembangan ini, pengusaha dapat menghitung kebutuhan konsumsi bahan bakar untuk kendaraan pengangkut logistik yang dioperasikan dengan akurat. Kata kunci: efisiensi bahan bakar, Internet of Things (IoT), perusahaan transposrtasi, revolusi industri 4.0, terhubung
Sistem Pembumian Pada Pembangkit Listrik Tenaga Surya (PLTS) Pandapotan, Boris Poltak; Kumoro, Andri Cahyo; Widayat, Widayat
Jurnal Profesi Insinyur Indonesia Vol 3, No 1 (2025): JPII
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2025.25734

Abstract

Sistem pembumian (grounding) merupakan komponen penting dalam instalasi Pembangkit Listrik Tenaga Surya (PLTS). Artikel ini membahas desain, implementasi dan evaluasi sistem pembumian untuk menjamin keselamatan, keandalan dan perlindungan terhadap lonjakan tegangan. Metode pembumian yang digunakan melibatkan pembumian sistem dan pembumian peralatan, dengan pengukuran resistivitas tanah untuk memastikan nilai resistansi yang memenuhi standar internasional. Hasil pengujian menunjukkan bahwa resistansi tanah berhasil diturunkan hingga 3,9 ohm, memenuhi standar IEEE Std 80. Sistem pembumian ini memberikan perlindungan optimal terhadap arus gangguan dan lonjakan tegangan, meningkatkan keamanan operasional PLTS. Kata kunci: sistem pembumian, PLTS, resistivitas tanah, proteksi arus gangguan, standar IEEE
Studi Analisis Karakteristik Tingkat Polusi pada Penggunaan Insulator di Proyek SUTET 500 kV Paiton-Kalipuro Putra, Ade Septia; Kumoro, Andri Cahyo; Hermawan, Ferry
Jurnal Profesi Insinyur Indonesia Vol 3, No 1 (2025): JPII
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2025.25735

Abstract

Penelitian ini bertujuan untuk menentukan jenis dan spesifikasi insulator yang sesuai untuk jalur transmisi SUTET 500 kV Paiton-Kalipuro, dengan memperhatikan kondisi lingkungan dan tingkat polusi di area tersebut. Jalur transmisi ini memiliki panjang 147,78 km dengan 337 tower yang melintasi berbagai area, termasuk pantai, jalan, sungai, rel kereta api dan jaringan transmisi eksisting. Berdasarkan tingkat polusi yang tinggi (Very Heavy), diperlukan insulator dengan creepage distance minimum sebesar 17.050 mm. Perhitungan menunjukkan kebutuhan sebanyak 33 piringan insulator keramik tipe U 210 BP atau U 160 BLP, sesuai standar SPLN T3.008-1:2021. Selain itu, penelitian juga mengevaluasi potensi penggunaan insulator polimer, yang memiliki keunggulan seperti perawatan minimal, ketahanan terhadap korosi dan kemampuan tinggi menghadapi flashover, sehingga cocok digunakan di area pesisir yang berpolusi tinggi. Hasil penelitian ini memberikan rekomendasi spesifikasi insulator yang optimal untuk meningkatkan keandalan dan efisiensi operasional jalur transmisi SUTET 500 kV Paiton-Kalipuro. Kata kunci: insulator, polusi, SUTET 500 kV
Evaluasi Model Batu Bara dan Sequence Tambang PIT X Periode Triwulan 3 Tahun 2024 Alfariji, Moh; Silviana, Silviana; Kumoro, Andri Cahyo
Jurnal Profesi Insinyur Indonesia Vol 3, No 2 (2025): JPII
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2025.26860

Abstract

Pada umumnya, kegiatan pertambangan identik dengan kegiatan yang memiliki biaya dan risiko yang tinggi. Kendala utama yang terjadi pada aktivitas penambangan batu bara umumnya terkait dengan model batu bara yang menyimpang dari kondisi aktual. Oleh karena itu, evaluasi model batu bara dan sequence tambang yang baik sangat diperlukan sebagai acuan dalam kegiatan penambangan untuk mengontrol dan mengidentifikasi kesesuian perencanaan tambang terhadap perkembangan aktualnya. Tujuan dari penelitian ini adalah untuk mengevaluasi model batu bara dan sequence tambang PIT X terhadap progres aktual pada periode triwulan 3 tahun 2024. Evaluasi dipusatkan pada cadangan volumetrik (ton/bcm), spasial dan bentuk geometris dari bukaan tambang. Berdasarkan pada evaluasi model, secara umum teridentifikasi terjadinya penipisan lapisan batu bara dengan recovery model bulan Juli, Agustus dan September masing-masing sebesar 121%, 73% dan 82%. Evaluasi sequence tambang bulan Juli memiliki volume overcut 466,329 bcm, undercut 84,247 bcm dan on grade 172,685 bcm. Pada bulan Agustus, terverifikasi adanya volume overcut sebesar 43,273 bcm, undercut 94,009 bcm dan on grade 512,968 bcm. Sedangkan pada bulan September, tervalidasi volume overcut sebesar 25,400 bcm, undercut 94,509 bcm dan on grade 530,391 bcm. Hasil evaluasi juga menunjukkan bahwa ketercapaian kinerja produksi untuk bulan Juli, Agustus dan September masing-masing adalah 98%, 90% dan 84%. Kata kunci: batu bara, kinerja, model recovery, mine planning, sequence
Process Simulation of Oil Palm Empty Fruit Bunch (OPEFB) Pyrolysis using Open-Source DWSIM: Analysis of Temperature-Dependent Product Yields Utomo, Dani Puji; Andri Cahyo Kumoro; Muhammad Haqqiyuddin Robbani
Jurnal Bahan Alam Terbarukan Vol. 14 No. 1 (2025): June 2025 [Nationally Accredited Sinta 3]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v14i1.28723

Abstract

This study investigates the pyrolysis of Oil Palm Empty Fruit Bunches (OPEFB) using the open-source process simulation software DWSIM to evaluate the impact of temperature on product distribution, particularly bio-oil, biochar, and pyrolysis gas. OPEFB, an abundant lignocellulosic waste from Indonesia’s palm oil industry, holds significant potential as a renewable biomass feedstock. The simulation model was developed based on thermochemical conversion principles and was validated against selected experimental data from the literature. Results show that pyrolysis temperature significantly influences the yield and composition of the products. The gas yield increased with temperature up to 460°C, dominated by CO, CO₂, and H₂ due to the decomposition of volatile organic matter. However, gas yield declined beyond 460°C, likely due to secondary reactions converting gas precursors into liquid products. The optimal temperature was found to be around 510°C, offering a balanced yield of bio-oil and gas with minimal biochar formation. The chemical composition of bio-oil included furfural, phenols, alcohols, and acetic acid—compounds derived from the breakdown of cellulose, hemicellulose, and lignin. Biochar yield decreased with temperature, but its quality improved in terms of carbon content and fixed carbon fraction. This study highlights the utility of DWSIM as an accessible and transparent tool for simulating biomass pyrolysis. Future work should focus on refining the kinetic parameters, experimental validation of simulation results, and integrating downstream processing for fuel and chemical recovery.
Optimization of ultrasound assisted extraction of sappan (Caesalpinia sappan L) wood for preparation of high quality extract Djaeni, Moh; Budi Sasongko, Setia; Yuni Susanti, Devi; Mahatmanti, F Widhi; Cahyo Kumoro, Andri; Kurniasari, Laeli
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1710

Abstract

This study optimized the Ultrasound-Assisted Extraction (UAE) of sappan wood (Caesalpinia sappan L.) using Central Composite Design-Response Surface Methodology (CCD-RSM) and investigated its kinetics. Temperature, solvent-to-solid ratio, and extraction time were selected as independent variables with extract yield as the response. Analysis of Variance (ANOVA) showed that the solvent-to-solid ratio significantly affected yield. Optimal extraction conditions were 69.9°C, 29.9 mL/g, and 20.2 min, producing approximately yield of 0,293 mg GAE/g sample. High Performance Liquid Chromatography (HPLC) confirmed the presence of brazilin, while Fourier Transform InfraRed (FTIR) analysis indicated the retention of functional groups. UAE was shown to enhance extraction efficiency and preserve phenolic compounds. Additionally, the extraction process was modeled, resulting in a validated effective diffusivity (De) of 1.8 × 10?? cm²/s, The kinetic study was useful in industrial application especially to determine appropriate extraction time.
Incorporating silica synthesized from rice husk ash into a calcium oxide catalyst for biodiesel production Alhanif, Misbahudin; Mustafa, Mustafa; Kumoro, Andri Cahyo; Wahyono, Yoyon; Zaim, Hanif Fawwaz; Zahra, Nurul Afifah
Reaktor Volume 25 No.2 August 2025
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.25.2.58-69

Abstract

Biodiesel represents a promising renewable energy alternative to either substitute or be blended with conventional diesel, offering advantages such as a high cetane number, reduced sulfur (SOx) and CO₂ emissions, and greater environmental sustainability. The application of calcium oxide (CaO) as a basic catalyst in biodiesel production has been extensively reported. However, its catalytic performance is limited by its sensitivity to moisture, which can negatively affect the reaction rate. In addition, some of the Ca2+ ions in the catalyst can dissolve in the mixture of biodiesel and glycerol, causing product contamination. This study aims to combine a CaO catalyst from marble powder with sulfonated silica (SiO2) from rice husk ash (RHA) to enhance the distribution of catalyst particles, reduce crystallinity, and increase the surface area of the catalyst. This study was conducted through chemical and thermal activation of SiO2 from RHA, sulfonation of SiO2, thermal activation of CaO from marble powder waste, and impregnation of CaO/SiO2 catalyst with variations in CaO/SiO2 composition (25%:75%, 50%:50%, 75%:25%). The results showed that the purity of SiO2 and CaO obtained through chemical and thermal activation was 93.67% and 99.13%, respectively. The sulfonation process on SiO2 successfully added –SO3 groups at 36.5%, which supported the formation of acid sites on the catalyst. Characterization showed that the surface morphology was composed of particles measuring 2–8 µm with a dominant amorphous structure. The addition of SiO2 gave rise to new crystal peaks but decreased the crystal intensity, especially at the 50%:50% composition. The composition of CaO/SiO2 at 75%:25% showed the best physical properties with a surface area of 22.24 m²/g, a pore volume of 65.29 mm³/g, and a pore diameter of 11.74 nm, indicating high potential as a bifunctional catalyst for biodiesel esterification–transesterification.
Co-Authors . Widayat Adi Cifriadi Adi Cifriadi, Adi Agus Suprihanto Ahmad - Fauzan Aji Prasetyaningrum Alfariji, Moh Ana Farida Aprilina Purbasari Arkie Septiana A. Arkie Septiana A. Aryanti, Nita Asep Muhamad Samsudin, Asep Muhamad Asron Ferdian Falaah Asron Ferdian Falaah, Asron Ferdian Avriliana Dewi A. Bakti Jos Bakti Jos Budiyono Budiyono C Sri Budiyati Catarina Sri Budiyati Catarina Sri Budiyati Catarina Sri Budiyati Cindi Yasintasia Dessy Ariyanti Diah Permata Wijayanti Diah Susetyo Retnowati Didi Dwi Anggoro Dwi Haryanti Evi Ristanti R F Widhi Mahatmanti Ferry Hermawan Fitra Pradhita Frans Arienata H. Frans Arienata H. H Hadiyanto H. Hargono Hacker, Viktor Hargono . Hargono Hargono Hargono Hargono Kharis Yohan Abidin Kristinah Haryani Kurniawan, Tonni Agustiono Laeli Kurniasari M. Djaeni Maharani Ratridewi Marcelinus Christwardana Margaretha Praba Aulia Marissa Widiyanti Masitah Hasan Misbahudin Alhanif Moh Djaeni Monica Setiono H. Muhammad Haqqiyuddin Robbani Nafiunisa, Aininu Nasher, Kharissa Nor Basid Adiwibawa Prasetya Nur Rokhati Nurul Aini Pamungkas, Prihantoro Pandapotan, Boris Poltak Putra, Ade Septia Ratnawati Ratnawati Retno Wulandari Riris Yuliana Y.S. Rizka Amalia Rizka Amalia Rizka Amalia Roschger, Michaela Setia Budi Sasongko Silviana Silviana Sofiah Sofiah Sri Sinto Dewi Sulardjaka Sumardi Sumardi Tutuk Djoko Kusworo Utomo, Dani Puji Wahyono, Yoyon Wahyudi, Dhiky Wardhani, Dyah Hesti Wikanastri Hersoelistyorini Wilis Ari Setyati Yuni Susanti, Devi Zahra, Nurul Afifah Zaim, Hanif Fawwaz