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All Journal Sewagati Jurnal Teknik Kimia dan Lingkungan International Journal of Renewable Energy Development Jurnal Polimesin Journal Mechanical Engineering
Jakfar, Amin
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Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Implementasi Alat Pemisah Gabah Padi Menggunakan Sistem Cyclone sebagai Upaya Meningkatkan Efektivitas Pekerjaan Buruh Tani di Kelurahan Karang Dalam Ulfiyah, Laily; Wilujeng, Auliana Diah; Fatah, Misbakhul; Febriana, Ike Dayi; Fikri, Mohammad Anas; Hadiwijaya, Lukman; Jakfar, Amin; Rohmah, Faizatur; Annafiyah; Hamid, Abdul; Ulfah, Nadiyah; Wijaya, Septian Dwi; Dewi, Ratna Ayu Pawestri Kusuma
Sewagati Vol 8 No 1 (2024)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v8i1.766

Abstract

Padi merupakan tanaman pangan utama di Indonesia yang kaya karbohidrat sehingga menjadi makanan pokok masyarakat Indonesia. Dan untuk meningkatkan produksi padi, tidak hanya dengan memperluas areal pertanaman dan peningkatan teknik budidaya saja, tetapi perlu diperhatikan dalam penanganan panen khususnya dipemisahan padi yang harus tepat. Berdasarkan profil Kabupaten Sampang tahun 2017, produk unggulan daerah dalam sektor pertanian adalah padi. Oleh karna itu produksi padi harus lebih ditingkatkan agar dapat memenuhi kebutuhan sektor pangan masyarakat. Salah satu upaya meningkatkan produksi padi adalah dengan mengoptimalkan proses pemisahan gabah padi. Dalam artikel ini dibuat alat pemisah gabah padi dengan memanfaatkan sistem cyclone sehingga padi isi yang lebih berat akan terpisah dengan padi kosong yang lebih ringan. Dengan memanfaatkan gaya sentrifugal padi isi yang lebih berat akan terlempar keluar menuju penampungan padi isi. Sedangkan padi kosong yang ringan akan turun keluar ke penampungan padi kosong. Alat ini berukuran 80 x 40 x 80 cm. Dengan kapasitas 100 kg/jam, alat ini mampu meningkatkan produktivitas pekerjaan panen padi. Alat ini dihibahkan pada Kelompok Tani Bandar Kumala di Desa Karang Dalam, Kecamatan Sampang.
Synthesis of sodalite-natural dolomite as novel bifunctional catalyst for biodiesel production: Experimental study of performance and emissions on diesel engine Fatah, Misbakhul; Hamid, Abdul; Rahmawati, Zeni; Saiful, S.; Purbaningtias, Tri Esti; Jakfar, Amin
International Journal of Renewable Energy Development Vol 14, No 5 (2025): September 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61434

Abstract

The development of catalysts derived from natural minerals was investigated in this study for biodiesel production due to their high catalytic activity, abundant availability, low production cost, and environmentally friendly. Biodiesel was produced from Calophyllum Inophyllum (CI) oil using bifunctional catalyst synthesized from natural dolomite and sodalite. In addition, an experimental study was conducted to evaluate the performance and emission characteristics of the produced biodiesel in a diesel engine. The natural dolomite catalyst contains a high composition of CaO-MgO, while sodalite, consisting of Si and Al precursors, was synthesized from natural kaolin. The bifunctional catalysts were synthesized via wet impregnation method with varying loadings of natural dolomite (5, 10, 15, 20, and 25 wt%). FTIR, XRD, SEM-EDX, and N2 adsorption-desorption analyses were employed to characterize the physicochemical properties of the catalysts. The optimum biodiesel yield of 94.14 % was obtained at dolomite loading of 25 wt%. Engine performance tests revealed that the B10 fuel blend produced maximum power and torque of 1.252 kW and 69.151 N.m, respectively, at 1250 rpm. While the optimum specific fuel consumption was obtained at 0.0004 Kg.HP/h at 1250 rpm for all fuel blends.The lowest CO emission was recorded for the B40 fuel blend at 414 ppm, while the lowest NO and NOx emissions were observed for the D100 fuel at 88 and 86 ppm, respectively.
Waste cooking oil biodiesel via a sodium hydroxide-catalyzed transesterification process: effects on diesel engine performance and emissions Hamid, Abdul; Syafa, Muhammad Badrus; Fatah, Misbakhul; Jakfar, Amin; Rahmawati, Zeni; Purbaningtias, Tri Esti; Fikri, Mohammad Anas; Rohmah, Faizatur; Wilujeng, Auliana Diah
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7374

Abstract

This study reports the synthesis of biodiesel from locally sourced Waste Cooking Oil (WCO) using sodium hydroxide (NaOH) catalyst. The main objective of this research is to assess the feasibility of utilizing WCO-based biodiesel as a sustainable alternative fuel by analyzing its physicochemical properties and application in a Yanmar® TF 70 LY-DI diesel engine. The production process involved degumming, acid-catalyzed esterification, and base-catalyzed transesterification to address the high free fatty acid content of WCO. The resulting biodiesel met ASTM D6751 standards, with a kinematic viscosity of 5.06 cSt, a flash point of 164°C, a density of 885 kg/m3, a FAME yield of 98.17%, and an acid number of 0.12 mg-KOH/g. Engine tests were performed using blends from B10 to B40 and benchmarked against pure diesel. Results showed that B10 and B20 blends maintained comparable engine performance, while higher blends (B30–B40) exhibited reductions in power and torque and increased Specific Fuel Consumption (SFC). CO emissions decreased significantly with increasing biodiesel content, whereas NO and NOx emissions rose due to higher combustion temperatures. These findings demonstrate the technical feasibility and environmental benefits of WCO-derived biodiesel, particularly at lower blend ratios (≤ B20), as a locally available and sustainable fuel. The study is limited to laboratory-scale testing on a single-cylinder engine without long-term durability assessments, which should be addressed in future studies.
Optimization of Biodiesel Production from Sunflower Oil Using Sodalite-Based Catalyst via Taguchi Method Hamid, Abdul; Jakfar, Amin; Rahmawati, Zeni; Armansyah, Muhammad Doni; Wahyuni, Tri; Purbaningtias, Tri Esti; Febriana, Ike Dayi; Abdullah, Mohammad; Ilmah, Aurista Miftahatul; Rohmah, Faizatur
Jurnal Teknik Kimia dan Lingkungan Vol. 9 No. 2 (2025): October 2025
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtkl.v9i2.7345

Abstract

The growing demand for alternative fuels has highlighted biodiesel as sustainable substitute for fossil diesel. In this study, biodiesel was produced from sunflower seed oil using heterogeneous catalyst synthesized from natural kaolin into sodalite via hydrothermal process. The synthesized catalyst was characterized using XRD, FTIR and SEM-EDS, confirming the transformation of kaolinite to sodalite. The transesterification reaction was conducted under varying methanol-to-oil molar ratios (1:12, 1:18, and 1:24) and temperatures (60, 65, and 70°C). A Taguchi orthogonal array (L9) was employed to statistically evaluate the effects of these parameters on methyl ester yield. Experimental results showed that both methanol ratio and reaction temperature significantly influenced biodiesel yield, with the highest yield of 90.44% obtained at 70°C and 1:18 molar ratio. Signal-to-noise ratio and ANOVA analysis indicated that the methanol-to-oil ratio was the most dominant factor (46.05%) compared to temperature (40.55%). The resulting biodiesel exhibited a flash point of 158°C, acid value of 0.06 mg-KOH/g, and iodine value of 84.06 g-I₂/100g, satisfying most ASTM D6751 and SNI 7182:2015 standards, though viscosity and density exceeded standard limits. Emission testing showed 16% reduction in CO emissions with increasing biodiesel blends, while NO and NOx emissions slightly increased.
Penggunaan Saringan Sebagai Alat Untuk Membantu Mengurangi Kadar Merkuri Yang Tercemar Di Desa Debowae Kecamatan Waelata Kabupaten Buru Provinsi Maluku Umasugi, Alfiansa; Pattykayhattu, Erwin. B.; Karyani , M. Said; Jakfar, Amin
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2100

Abstract

Gold mining activities on Buru Island legally or illegally cause water at several coordinate points to be contaminated with heavy metal types of mercury (Hg). Knowing the level of mercury in water is important to determine whether or not water can be consumed. This study aims to determine the level of mercury spread and how to overcome environmental damage due to mercury in water using eucalyptus charcoal. The method used in this study is quantitative by collecting data by observation, interviews, and literature studies. The variable in the study was filtering as a tool to reduce polluted mercury levels. The results of this study were carried out at 3 coordinates and 2 of the 3 coordinates showed a decrease in mercury levels, namely in the coodninat of the father's house, sub-district and village hall successively decreased by 18 μg / L and 2 μg / L. From the results it can be concluded that the level of mercury levels does not exceed the Quality standard figures placed according to the Ministry of Environment and Forestry No.Kep 51 of 2004 and eucalyptus charcoal can reduce mercury levels deposited in water. Based on the results of the research conducted, it turns out that there are still many shortcomings using this method. For future researchers who want to conduct similar research, in order to complement by answering the shortcomings of this study. Keywords: mercury, eucalyptus, filter
Co-Authors Abdul Hamid Abdullah, Mohammad Annafiyah Armansyah, Muhammad Doni Auliana Diah Wilujeng Aurista Miftahatul Ilmah Dewi, Ratna Ayu Pawestri Kusuma Fatah, Misbakhul Febriana, Ike Dayi Fikri, Mohammad Anas Hadiwijaya, Lukman Karyani , M. Said Pattykayhattu, Erwin. B. Rahmawati, Zeni ROHMAH, FAIZATUR Saiful, S. Syafa, Muhammad Badrus Tri Esti Purbaningtias tri wahyuni Ulfah, Nadiyah Ulfiyah, Laily Umasugi, Alfiansa Wijaya, Septian Dwi