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Obie Farobie
Division Of Biosystem Engineering, Faculty Of Engineering And Technology, IPB 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 Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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PEMANFAATAN BIODIESEL-EMULSI AIR SEBAGAI BAHAN BAKAR PENGERINGAN KARET REMAH Hanifarianty, Sherly; Handayani, Hani; Falaah, Asron Ferdian; Maspanger, Dadi Rosadi; Andriani, Woro; Farobie, Obie; Rusli, Meika Syahbana
Jurnal Penelitian Karet JPK : Volume 43, Nomor 1, Tahun 2025
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v43i1.949

Abstract

Emulsi biodiesel-air dapat digunakan sebagai bahan bakar alternatif untuk pengeringan karet remah. Biodiesel yang digunakan merupakan campuran 70% solar dan 30% FAME (B30) serta campuran 60% solar dan 40% Fatty Acid Methyl Ester (FAME) (B40) dari minyak sawit mentah (CPO). Potensi penggunaan biodiesel untuk pengeringan karet remah tidak kurang dari 90-120 juta liter per tahunnya. Namun penggunaan biodiesel sebagai bahan bakar pengeringan remah karet masih perlu dikaji karena banyak mengandung NOx dan PM (partikel) yang berpotensi menurunkan kualitas karet.Penggunaan air dimaksudkan untuk ditingkatkan penghematan bahan bakar dan meminimalkan emisi Nitrogen Oksida (NOx) dan partikel udara yang berpotensi menurunkan kualitas karet. Berdasarkan beberapa penelitian terdahulu untuk membuat emulsi minyak-air solar dengan menggunakan surfaktan, maka pada penelitian ini dikembangkan metode preparasi emulsi biodiesel B30-air dan emulsi biodiesel B40-air dengan menggunakan campuran surfaktan Span 80 dan Tween 80, dengan rasio antara biodiesel dan air yaitu 90:10 (v/v). Emulsi biodiesel-air yang homogen dan stabil yaitu emulsi B30-air dan B40-air diperoleh dengan menambahkan emulsifier 5% yang terdiri dari campuran Span 80 dan Tween 80 sebagai surfaktan sehingga membentuk emulsi B30-air dan B40-air. Hasil penelitian menunjukkan bahwa Biodiesel B30-emulsi air dan emulsi B40-air dengan kadar air 10% dapat disintesis menggunakan kombinasi surfaktan SPAN 80 dan TWEEN 80 sebanyak 5% dengan cara diaduk menggunakan mixer kecepatan tinggi (23.000 rpm) selama 1-2 menit hingga menghasilkan emulsi yang stabil lebih dari 30 hari (untuk emulsi air B30) dan sampai dengan 5 hari (untuk emulsi air B40) untuk pengeringan 130 - 135ºC. Untuk emulsi B30-air dan B40-air dengan kadar air 10% layak digunakan sebagai bahan bakar alternatif pengeringan karet remah. Kualitas karet remah kering yang dihasilkan memenuhi standar persyaratan sesuai SNI 1903:2017.
Phycocyanin production from Galdieria sulphuraria 009 in palm oil mill effluent: growth, extraction, and antioxidant activity: Produksi fikosianin dari Galdieria sulphuraria 009 dalam limbah cair pabrik kelapa sawit: pertumbuhan, ekstraksi, dan aktivitas antioksidan Rahman, Delicia Yunita; Praharyawan, Swastika; Apriastini, Marsiti; Nurcahyani, Puji Rahmawati; Nafisyah, Ayu Lana; Fatriasari, Widya; Amrullah, Apip; Farobie, Obie
Jurnal Pengolahan Hasil Perikanan Indonesia Vol. 28 No. 5 (2025): Jurnal Pengolahan Hasil Perikanan Indonesia 28(5)
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17844/jphpi.v28i5.63115

Abstract

Limbah cair industri kelapa sawit (palm oil mill effluent atau POME) di Indonesia menghasilkan volume yang tinggi dan berpotensi mencemari lingkungan. Mikroalga dapat dimanfaatkan untuk mengurangi limbah sekaligus menghasilkan produk biomassa yang bernilai tambah. Penelitian ini bertujuan menentukan konsentrasi optimum POME bagi pertumbuhan mikroalga Galdieria sulphuraria 009, mengevaluasi produksi fikosianin, serta menilai aktivitas antioksidannya. Penelitian ini diawali dengan penapisan awal menggunakan 5–50% POME untuk mengidentifikasi kondisi pertumbuhan mikroalga yang optimum; budi daya dalam bioreaktor dengan variasi konsentrasi (2,5; 5,0; dan 7,5%) untuk mengevaluasi kinerja pertumbuhan; dan analisis aktivitas antioksidan serta kandungan pigmen dalam biomassa. Penapisan awal menunjukkan bahwa POME 5% merupakan konsentrasi optimal, sedangkan konsentrasi lebih tinggi menghambat pertumbuhan akibat berkurangnya penetrasi cahaya. Pada budidaya lanjutan, mikroalga dalam POME 2,5% menunjukkan hasil sebanding dengan kontrol (Allen pH 2), sedangkan konsentrasi lebih tinggi menghambat pertumbuhan akibat penaungan dan toksisitas amonia. Produksi fikosianin per volume kultur tertinggi diamati pada mikroalga yang dibudidayakan dalam POME 2,5%, dengan hasil yang sebanding dengan media kontrol. Uji aktivitas antioksidan mengonfirmasi bahwa semua ekstrak fikosianin memiliki aktivitas antioksidan yang signifikan, dengan aktivitas tertinggi pada POME 7,5%. Kandungan karotenoid dan klorofil a dievaluasi dalam biomassa segar dan residu setelah ekstraksi. Karotenoid lebih melimpah dalam biomassa segar, sedangkan klorofil a lebih tinggi dalam residu biomassa. Penelitian ini menunjukkan bahwa G. sulphuraria 009 berpotensi sebagai sumber fikosianin yang layak dalam budidaya berbasis POME, serta memberikan wawasan mengenai pemanfaatan limbah industri dan pengembangan produk bioteknologi berkelanjutan.
Peningkatan kesadaran sanitasi masyarakat pedesaan melalui diseminasi pembuatan sabun transparan Farobie, Obie; Saprudin, Deden; Firmansyah, Shaeful
Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Vol 5 No 1 (2022)
Publisher : University of Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jipemas.v5i1.13822

Abstract

Pengembangan suatu wilayah perlu dilakukan dari satuan terkecil, yaitu pembangunan pedesaan. Desa Tonjong merupakan salah satu dari 410 desa di Kabupaten Bogor yang memiliki potensi yang baik di sektor pertanian, namun masyarakatnya masih memiliki kesadaran yang rendah terkait sanitasi. Kegiatan ini bertujuan memberikan informasi dan pengetahuan mengenai pentingnya menjaga hidup bersih serta transfer pengetahuan terkait pembuatan sabun transparan. Kegiatan ini juga bertujuan untuk mengetahui tingkat kesukaan responden terhadap sabun transparan serta mengevaluasi pemahaman warga terkait proses pembuatan sabun transparan. Tahapan pelaksanaan kegiatan meliputi persiapan, pelatihan pembuatan sabun transparan, dan pelaksanaan evaluasi kegiatan. Hasil uji organoleptik terhadap produk sabun transparan menunjukkan bahwa tingkat kesukaan tinggi pada warna, kelembapan, aroma, dan kehalusan namun rendah pada tingkat kemampuan busa. Hasil evaluasi keseluruhan menunjukkan bahwa ada peningkatan pengetahuan dan pemahaman peserta tentang bahan baku pembuatan sabun (dari 30% menjadi 100%), tata cara pembuatan sabun transparan (dari 5% menjadi 100%), serta manfaat sabun untuk kesehatan (dari 5% menjadi 100%).
Pengaruh Variasi Pulsed-Spray Time dengan Water Coolant Pada Media Pendinginan Terhadap Efisiensi dan Temperatur Panel Surya Ansyah, Pathur Razi; Cahyono, Gunawan Rudi; Budianto, Akhmad Ghiffary Budianto; Amrullah, Apip; Farobie, Obie; Jamalulail, Nanda; Lukmana, Wahyu
Jurnal Keteknikan Pertanian Vol. 13 No. 1 (2025): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.013.1.18-38

Abstract

Teknologi panel surya memungkinkan konversi cahaya matahari menjadi energi listrik. Akan tetapi, ada masalah yang dapat muncul pada kinerja panel surya, misalnya peningkatan suhu panel surya melebihi batas kerjanya sendiri. Suhu yang semakin meningkat akan membuat kinerja panel surya semakin berkurang. Maka, penting menjaga suhu panel surya sangat diperlukan agar performanya tetap optimal. Penelitian ini dilakukan untuk mengetahui pengaruh delay timing back and front surface spray cooling terhadap temperatur rata – rata, daya output, dan pengoptimalan energi panel surya. Pengujian ini menghasilkan temperatur panel surya sangat menurun ketika delay timing spray 10 menit senilai 58,95°C, ketika delay timing spray 20 menit senilai 70,78°C, sedangkan ketika delay timing spray 30 menit senilai 78,63°C. Metode pendinginan yang dilakukan selama 1 menit dengan variasi delay timing spray 10 menit, 20 menit, dan 30 menit. Uji eksperimental ini dapat menurunkan suhu panel surya, pada delay timing spray 10 menit menjadi 58,95°C, pada delay timing spray 20 menit menjadi 70,78°C, dan pada delay timing spray 30 menit menjadi 78,63°C. Metode pendinginan dilakukan selama 1 menit dengan delay timing spray yang bervariasi yaitu 10 menit, 20 menit dan 30 menit. Melalui pengujian ini juga diperoleh nilai energi total. Apabila delay timing spray 10, 20 dan 30 menit masing-masing sebesar 8,61 x 10-3 kWh (30982,06 Joule), 8,03 x 10-3 kWh (28890,32 Joule) dan 7,61 x 10-3 kWh (27408,06 Joule). Kesimpulan dari penelitian yang telah dilakukan adalah delay timing spray yang paling optimal delay timing spray selama 10 menit dengan suhu rata-rata sebesar 58,95°C, dan optimalisasi energi terbaik adalah dengan energi total sebesar 30982,06 Joule atau 8,61 x 10 -3kWh.
Effect of Biomass Waste and CaO Blend Compositions on the Pelletizing Characteristics of Refuse-Derived Fuel (RDF) Lusi Ernawati; Rizqy Romadhona Ginting; Rizka Lestari; Apip Amrullah; Obie Farobie; Pandji Prawisudha; Muhammad Raihan; Pangga Apriliawan
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 3 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i3

Abstract

Refuse-Derived Fuel (RDF) is increasingly acknowledged as a sustainable method of managing municipal solid waste while simultaneously producing valuable energy. However, the quality and compactness of RDF as a fuel can vary substantially depending on the materials used to produce it. The incorporation of biomass waste and calcium oxide (CaO) significantly influences the pelletizing behavior of biopellets by altering their physical and thermal properties, which in turn determines their effectiveness and suitability as a fuel source. In this study, representative RDF pellets were prepared by blending four primary components: wood sawdust, organic waste, plastic waste, and a fixed proportion of CaO. The investigation focused on assessing the effects of varying biomass waste-to-organic waste ratios on the physicochemical characteristics, densification behavior, and proximate properties of typical RDF pellets. The experimental design included biomass-to-organic waste ratios of 1:1, 2:1, 3:1, 4:1, 5:1, and 6:1 while the proportions of plastic (20 wt%) and CaO (5 wt%) were held constant. The findings revealed that optimal RDF performance was achieved at biomass-to-organic waste ratios of 1:1 and 6:1, respectively. The resulting RDF pellets exhibited the following properties: ash content of 7.04 ± 8.78%, moisture content of 8.19 ± 8.82%, volatile matter ranging from 65.11 ± 66.19%, fixed carbon content of 13.95 ± 17.32%, calorific values between 4193 ± 4419 kcal·kg-1, and bulk densities of 0.98 ± 1.18 kg·dm-3. These results highlight the potential of RDF pellets as a promising alternative fuel source for boiler applications.
Sintesis keton dari asam lemak stearat dengan katalis layered double hydroxide (LDH) Mg-Al-Cu Firman Arief Soejana; Erliza Hambali; Obie Farobie
AGROINTEK Vol 18, No 2 (2024)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v18i2.17108

Abstract

The synthesis of ketones from stearic fatty acids using the fatty acid decarboxylation method to ketones has been carried out to increase the added value of palm oil derivative products. One of the derivative products of palm oil is Crude Palm Oil which can be converted into fatty acids through the triglyceride hydrolysis process. Palm fatty acids are Indonesia's most potentially environmentally friendly raw material. This research aims to synthesize ketones from palm fatty acids using a catalyst. Ketone compounds were synthesized using a solid base catalyst as a double hydroxide layer based on Mg-Al-Cu. Identification of the presence of a C=O ketone group was carried out by testing the Fehling test, Tollens, spectrophotometer (FTIR), and computing the yield. The results showed the success of ketone synthesis using the fatty acid decarboxylation method into ketones through a test of Fehling's on stearic fatty acid ketone products. Meanwhile, in the Tollens test, there wasn't a change in the silver mirror. Furthermore, the spectrophotometer test (FTIR) showed the presence of a C=O bond or a carbonyl group at the peak wave 1707 cm-1. Ketone's synthesis produced was 95.09%.
Utilization of Bamboo Powder in The Production of Non-Asbestos Brake Pads: Computational Bibliometric Literature Review Analysis and Experiments to Support Sustainable Development Goals (SDGs) Asep Bayu Dani Nandiyanto; Aisha Nadhira Syazwany; Karina Nur Syarafah; Themy Sabri Syuhada; Risti Ragadhita; Erna Piantari; Obie Farobie; Muhammad Roil Bilad
Automotive Experiences Vol. 7 No. 1 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.11109

Abstract

This study aims to develop asbestos-free and environmentally friendly brake pads using apus bamboo powder (Gigantochloa apus). In the experiments, bamboo powder, resin, and catalyst were used as the raw materials and varied to ensure the quality of the prepared brake pads. To analyze the performance of brake pads, the fabricated brake pads are subjected to physicochemical tests (such as microscopic tests and functional group analysis) and mechanical tests (such as puncture tests, compression tests, and friction tests). The research results showed that adjusting the composition of the raw materials allowed a change in the performance of the brake pad, including porosity, morphological structure, and mechanical properties. Indeed, the condition of the low porosity on the inside of the brake pad strategically optimizes the compression strength of the material, making this design ideal for applications that require high resistance to compression loads. This study shows the possibility of apus bamboo powder as an alternative to asbestos in the production of non-asbestos brake pads, offering a safer and environmentally friendly solution as well as giving ideas for supporting current issues in the sustainable development goals (SDGs).
How to Calculate Dimensionless Numbers in Fluid Mechanics and Their Applications in Chemical Engineering Processes: Reynolds, Mach, Froude, Euler, Power, Stokes, Weber, Capillary, and Cavitation Numbers Asep Bayu Dani Nandiyanto; Obie Farobie; Belkheir Hammouti
ASEAN Journal for Science and Engineering in Materials Vol 5, No 3 (2026): AJSEM: Volume 5, Issue 3, December 2026
Publisher : Bumi Publikasi Nusantara

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Abstract

This paper explains how to calculate and interpret dimensionless numbers in fluid mechanics for chemical engineering applications, focusing on the Reynolds, Mach, Froude, Euler, Power, Stokes, Weber, Capillary, and Cavitation numbers. The first part presents each dimensionless number individually based on its definition, formula, required variables, threshold values, physical meaning, calculation example, interpretation, and handling strategy. The second part presents integrated case examples to show how several dimensionless numbers can be used together to analyze more complex chemical engineering systems. The examples include pipe flow, gas flow, heat exchangers, slurry pipelines, pumps, valves, nozzles, mixing vessels, wastewater aeration basins, aerated fermentation bioreactors, spray drying systems, cyclones, and particle-laden flows. Through these examples, this paper aims to help readers connect dimensionless-number calculations with process behavior, engineering interpretation, and practical decision-making in chemical engineering.
Definition and Role of Sustainable Materials in Reaching Global Sustainable Development Goals (SDGs) Completed with Bibliometric Analysis Risti Ragadhita; Asep Bayu Dani Nandiyanto; Obie Farobie; Teguh Kurniawan; M. Roil Bilad
ASEAN Journal for Science and Engineering in Materials Vol 5, No 1 (2026): AJSEM: Volume 5, Issue 1, March 2026
Publisher : Bumi Publikasi Nusantara

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Abstract

Sustainable materials are essential in achieving the Sustainable Development Goals (SDGs), particularly in clean energy, water purification, waste reduction, and green infrastructure. This study investigates the role of material innovation in supporting the SDGs using a Systematic Literature Review (SLR) and bibliometric analysis (from Scopus database (2015–2025) using keywords “Sustainable Material,” “Green Material,” and “SDGs”). The findings showed a growing research trend, especially after the COVID-19 pandemic, with significant contributions from chemistry, engineering, and environmental sciences. Materials like nanomaterials, biomaterials, biodegradable polymers, and waste-derived products contribute to SDG 6, 7, 9, 12, and 13. Innovations such as green nanotechnology, bio-based materials, and circular material design show strong potential to address global sustainability challenges. These materials not only support emission reduction and waste valorization but also encourage green job creation and sustainable production. This study highlights interdisciplinary pathways to align material science with sustainable development.
How to Integrate Nanotechnology into Chemical Engineering Education: A Bibliometric and Technological Review of Curriculum Standards, Research Trends, Pedagogical Challenges, and Future Prospects Asep Bayu Dani Nandiyanto; Teguh Kurniawan; Muhammad Roil Bilad; Abdulkareem Sh. Mahdi Al-Obaidi; Obie Farobie; Belkheir Hammouti
ASEAN Journal of Educational Research and Technology Vol 5, No 2 (2026): AJERT: VOLUME 5, ISSUE 2, September 2026
Publisher : Bumi Publikasi Nusantara

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Abstract

This study examines the integration of nanotechnology into chemical engineering education and its implications for future curriculum development. A bibliometric and technological review was conducted using publications from major scientific databases, with standardized datasets and mapped collaboration and keyword networks to identify pedagogical and curricular trends. The findings indicate a steady growth of interdisciplinary research linking nanoscale concepts with process engineering, accompanied by increasing adoption of virtual laboratories, computer simulations, and intelligent tutoring systems. Nevertheless, challenges remain, including uneven faculty preparedness, limited access to advanced instrumentation, and the lack of unified competency frameworks across institutions. These constraints are largely driven by macro-centric teaching traditions, resource limitations, and inconsistent curriculum standards. To address these gaps, the study proposes targeted updates to core and elective courses that emphasize nano-centric content, sustainability, and digital pedagogy. Overall, the paper presents a practical framework aligned with Safe-by-Design principles and the United Nations Sustainable Development Goals.
Co-Authors Abdul Ghofur Abdulkareem Sh. Mahdi Al-Obaidi Aisha Nadhira Syazwany Akhmad Ghiffary Budianto Andi Firdaus Sudarma Andriani, Woro Apip Amrullah Apip Amrullah Apip Amrullah Apriastini, Marsiti Aris Purwanto Armansyah Halomoan Tambunan Asep Bayu Dani Nandiyanto Asron Ferdian Falaah, Asron Ferdian Belkheir Hammouti Deden Saprudin Edy Hartulistiyoso Edy Herianto Majlan Edy Herianto Majlan Erliza Hambali Erna Piantari Firman Arief Soejana Firmansyah, Shaeful Furqon Gilang Ramadhan Gunawan Rudi Cahyono Hani Handayani, Hani Hari Setiapraja Harri Junaedi Helen Lusiana Hendri Hizkia Gunawan Parulian Sianturi Imam Hidayat Irawansyah, Herry Jamalulail, Nanda Junita Tarigan Karina Nur Syarafah Khuzaimah Arifin Komar Sutriah Kurniawati, Diniar Mungil Lana Nafisyah, Ayu Lukmana, Wahyu Lusi Ernawati Lusi Ernawati M. Roil Bilad Maharani Dewi Solikhah Mahmud, Rizal Mamay Maslahat Maspanger, Dadi Rosadi Meika Syahbana Rusli Muhamad Fitri Muhammad Raihan Muhammad Raihan Muhammad Roil Bilad Muhammad Roil Bilad Nelwan, Leopold Oscar Nina Hartati Nono Darsono Nur Hasanah Pandji Prawisudha Pandji Prawisudha Pangga Apriliawan Pathur Razi Ansyah Rachmat Subagyo Radite Praeko Agus Setiawan Ragadhita, Risti Rahmadanis Rahmadanis Rahman, Delicia Yunita Risti Ragadhita Rizka Lestari Rizqy Romadhona Ginting Shaeful Firmansyah Sherly Hanifarianty, Sherly Swastika Praharyawan, Swastika Teguh Kurniawan Tetty Kemala Themy Sabri Syuhada Tri Yulni Widya FATRIASARI