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All Journal IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat
Ilmi Ilmi
Universitas Sumatera Utara
Automotive Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Pelatihan Pembuatan Sabun Cuci Piring Sebagai Upaya Peningkatan Keterampilan Anak Panti Asuhan Putera Muhammadiyah Kota Medan Suherman Suherman; Surya Sevi Wijayanna Lumban Tobing; Muharnif Muharnif; Adinda Juwita Nasution; 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.
Pengolahan Gas Buang Hasil Pembakaran Campuran Refuse Derived Fuel dan Serbuk Gergaji dengan Spray Tower Scrubber Ilmi Ilmi; Junjungan Simamora; Suherman Suherman; Zufri Hasrudy Siregar
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.v4i1.190

Abstract

The growing volume of waste has encouraged the use of fuel derived from waste as an alternative energy source. However, its combustion releases flue gas containing harmful pollutants. This study assesses the effectiveness of a spray tower in reducing the opacity and temperature of flue gas generated from the combustion of a mixture of waste-based fuel and sawdust. Experiments used three fuel masses and three system setups: no sprayer, two sprayers, and four sprayers. Results showed that the spray tower reduced opacity from 33 per cent to about 15 per cent with two sprayers and 11.2 per cent with four sprayers. Gas temperature decreased from 65 degrees Celsius to 39 degrees and 35 degrees Celsius. A higher number of sprayers led to greater pollutant reduction. This technology shows promise as an environmentally friendly method for controlling emissions.
Perancangan Mesin Dewatering Untuk Pemisah Sludge Pada Kolam IPAL Pabrik Kelapa Sawit Suherman Suherman; Susri Mizhar; Muharnif Muharnif; Ilmi Ilmi; Muhammad Subhan Ananda Tanjung
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.
Co-Authors Adinda Juwita Nasution Junjungan Simamora Muhammad Subhan Ananda Tanjung Muharnif M Siregar, Zufri Hasrudy Suherman . Surya Sevi Wijayanna Lumban Tobing Susri Mizhar