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All Journal JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Rekayasa Material, Manufaktur & Energi Hasil Pengabdian Kepada Masyarakat JMM (Jurnal Masyarakat Mandiri) Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Abdimas Madani dan Lestari (JAMALI) Jurnal MESIL (Mesin Elektro Sipil) Automotive Experiences Jurnal Derma Pengabdian Dosen Perguruan Tinggi (Jurnal DEPUTI) Sisfo: Jurnal Ilmiah Sistem Informasi IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat Jurnal Polimesin
Muharnif M
Fakultas Teknik Universitas Muhammadiyah Sumatera Utara Jalan Kapten Muchtar Basri No.3 Medan 20238, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Two Decades of Biodiesel Research from Waste Cooking Oil: A Bibliometric and Literature Review of Heterogeneous Catalysts Suherman, Suherman; Muharnif, Muharnif; Abdullah, Ilmi; Silitonga, Arridina Susan; Yusfiani, Marnida; Hamzah, Wan Azmi Wan
Automotive Experiences Vol 8 No 3 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.14776

Abstract

Waste cooking oil (WCO) represents an abundant yet underutilised feedstock for biodiesel production, constrained primarily by challenges related to catalyst performance and recyclability. Conventional homogeneous catalysts, such as sodium hydroxide (NaOH) and potassium hydroxide (KOH), often suffer from deactivation after several reuse cycles due to leaching and sensitivity to impurities. In contrast, heterogeneous catalysts, including calcium oxide (CaO) and biomass-derived materials, offer promising, reusable, and environmentally benign alternatives for WCO-based biodiesel synthesis. This study presents a comprehensive bibliometric and literature review examining global research trends in biodiesel production from WCO using heterogeneous catalysts. As environmental concerns and fossil fuel depletion intensify, biodiesel has gained increasing attention as a sustainable and renewable energy substitute. A total of 974 publications indexed in the Scopus database between 2006 and June 2024 were systematically analysed to identify key research trends, influential authors, geographical distribution, and thematic clusters. Data retrieved from the Scopus database were exported in RIS format and subsequently processed using VOSviewer for bibliometric visualisation. Keyword analysis revealed dominant clusters around “WCO biodiesel” and “heterogeneous catalysts”, encompassing research topics such as transesterification, oxidation stability, performance optimisation, and corrosion behaviour. The bibliometric mapping highlights strong interconnections among research themes, particularly those associated with catalysts, transesterification mechanisms, engine performance, and emission reduction. The literature review further evaluates various types of heterogeneous catalysts including CaO, biochar, and metal- and biomass-based catalysts focusing on their synthesis routes, physicochemical properties, and optimal operating conditions. Research productivity on WCO biodiesel peaked during 2020–2021 but declined after 2022, suggesting research saturation or shifting interest toward emerging renewable technologies. Co-country analysis identified India and Malaysia as leading contributors, while Tabatabaei et al. and Bae et al. were the most prolific authors. This study offers a holistic overview of research progress and future directions, providing valuable insights for advancing cleaner, more efficient, and sustainable biodiesel production technologies.
Perancangan Mesin Dewatering Untuk Pemisah Sludge Pada Kolam IPAL Pabrik Kelapa Sawit Suherman, Suherman; Mizhar, Susri; Muharnif, Muharnif; Ilmi, Ilmi; Tanjung, Muhammad Subhan Ananda
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i1.198

Abstract

Sludge generated from the wastewater treatment plant of palm oil mills contains a very high moisture content, which increases volume, handling costs, and poses a potential risk of environmental pollution if not properly managed. One of the main challenges encountered is the lack of a simple, economical small-scale dewatering machine that is suitable for the characteristics of sludge produced by palm oil mill wastewater treatment systems. This study aims to design and fabricate a dewatering machine to separate sludge from water in the wastewater treatment ponds of a palm oil mill. The research method involved designing the machine using SOLIDWORKS software, performing technical calculations of the main components such as motor power, shaft dimensions, belt transmission, and bearings, followed by fabrication and assembly processes. The performance of the machine was then evaluated based on its ability to separate sludge and water. The results indicate that the designed dewatering machine has a capacity of 200 litres per hour with a motor power of 1 HP; however, its performance has not yet reached optimal conditions, as part of the sludge remains attached to the screen, thereby increasing the motor load and hindering the movement of the screw. The findings of this study suggest that the dewatering machine design has the potential for further development through optimisation of the screw geometry and filtration system in order to improve sludge water separation efficiency in palm oil mill wastewater treatment plants.
Rancang Bangun Troli Multifungsi Kapasitas 100 Kg Rahmatullah, Rahmatullah; M, Muharnif; Nasution, Arya Rudi; Barus, Syahputra; Octariza, Gintara
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26784

Abstract

Technology to facilitate human activities in lifting and transporting work continues to develop. Trolleys are tools that can help move goods. The design of the trolley is planned to be able to transport simply but strong and stable. This trolley is made using plate materials, iron pipes and others in its manufacture. The materials are selected to ensure durability against heavy loads. The trolley lifting system is an electrical system that includes a battery, an electric motor, and a switch to control the trolley automatically. The trolley is made using 19 mm iron pipes, wheels, 3 mm iron plates, a transport body frame made of 58 mm iron pipes and also the drive or carrier is a 5 mm steel sling with 2 pcs electric motor batteries with a power of 12 volts each. The trolley made can carry an effective load of around 100 kg, but its performance will decrease as the load increases. Future suggestions are the use of lighter but stronger materials such as aluminum or composites, the use of larger capacity and efficient electric motors, and testing with a wider variety of loads to understand the limits and maximum performance of the trolley. Training in proper use and maintenance of the trolley is recommended to ensure optimal condition and maximum service life.
Karakteristik Minyak Atsiri Dari Kulit Jeruk Manis, Kulit Jeruk Purut, Dan Kulit Jeruk Bali Dengan Metode Distilasi Mukhtar, Muharnif; Ridho, Davidsyah; Suherman, Suherman; Khair, Hadriman
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.27260

Abstract

The distillation method is one way to produce essential oils from various parts of plants such as flowers, stems, bark and fruit, seeds and roots. This process has the advantage of oil purity and lower costs. The selection of sweet orange peel, kaffir lime peel and grapefruit peel as raw materials for making essential oils is due to their easy availability with fairly good essential oil characteristic quality. This study aims to obtain the best characteristic quality among the three types of peel used so that it is suitable for its use. The characteristics of essential oils analyzed include yield, acidity level (pH), water content, aroma resistance and color. The quality of essential oil characteristics greatly influences the use of essential oils in the industrial world such as food, beverages, perfumes, medicines and cosmetics. Based on the results obtained, kaffir lime peel produced the highest yield of 1.24%, the lowest water content of 9.21 indicating quality essential oil, the highest acidity level (pH) with a pH of 4.59 and a slightly yellowish clear color.
Pelatihan Pembuatan Sabun Cuci Piring Sebagai Upaya Peningkatan Keterampilan Anak Panti Asuhan Putera Muhammadiyah Kota Medan Suherman, Suherman; Lumban Tobing, Surya Sevi Wijayanna; Muharnif, Muharnif; Nasution, Adinda Juwita; Ilmi, Ilmi
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 3 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v3i3.370

Abstract

Training in making dish soap is a community service activity that aims to improve children's skills. This activity was carried out at the Muhammadiyah Putra Orphanage, Medan City, with the target of adolescent foster children. The methods used include counseling, direct practice in making dish soap, and discussion and evaluation of the results of the activities. The training materials include introductions to raw materials, the mixing process, and packaging techniques. The results of the activity showed that participants were able to understand and independently practice the process of making dish soap. In addition, participants gained basic knowledge of business opportunities in the household product industry. This activity has a positive impact on life skills and on fostering entrepreneurial motivation among foster children. Training in making dish soap is expected to be a sustainable skill provision and has the potential to be developed as an independent business in the orphanage environment.
Co-Authors A M Siregar A, Arfis Abdullah, Ilmi Adinda Juwita Nasution Ahmad Marabdi Siregar Ali, Rizki M Arridina Susan Silitonga - Arya Rudi Nasution Asfiati, Sri Aulia, Rakha Ramdan Barus, Syahputra Dewi Andriany Febrian, Muhammad Kevin Hadriman Khair Hamzah, Wan Azmi Wan hutasuhut, abdul azis Ilmi Ilmi, Ilmi IRMA DEWI K Umurani K.Umurani K.Umurani Lubis, Riadini Wanty Lubis, Yusuf Lumban Tobing, Surya Sevi Wijayanna M Yani M Yani Mariono, Nanang Pat Sumantri Marzuki Marzuki Mutia Arda, Mutia Nasution, Elvy Sahnur Nasution, Firman AlwiArif Nikmal, Nikmal Nurzanah, Wiwin Octariza, Gintara Pane, Yunita Pohan, Muhammad Ade syahputra Rahmatullah Rahmatullah Kasim Rahmatullah Rahmatullah Randy Septiawan Refan, Mahammad Ridho, Davidsyah Rimbawati Sandi, Didik Mei Siagian, Nusyirwan Said Siregar, Chandra Amirsyahputra Suherman Suherman ., Suherman Suherman, Suherman Suroso, Bekti Susri Mizhar Tanjung, Muhammad Subhan Ananda Umuani, Khairul Umurani, Khairul Wan Hamzah, Azmi Yusfiani, Marnida Zogner Halawa, Kevin