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All Journal Media Mesin: Majalah Teknik Mesin Briliant: Jurnal Riset dan Konseptual JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Jurnal Teknik Mesin Indonesia Scientific Journal of Mechanical Engineering Kinematika Civitas Ministerium: Jurnal Pengabdian Kepada Masyarakat Journal of Mechanical Engineering Warta LPM TEKNOSIA
Trisma Jaya Saputra
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Tidar
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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Implementation of a Sweet Potato Washing Machine for Brayan Grubi SMEs in Salaman District, Magelang Regency Rany Puspita Dewi; Trisma Jaya Saputra; Sigit Iswahyudi; Adityo Noor Setyo Hadi Dharmo; Herru Santosa Budiono; Bagus Yustia; Cahyo Sejati
Warta LPM WARTA LPM, Vol. 29, No. 1, Maret 2026
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/warta.v29i1.13170

Abstract

Brayan Grubi, a small and medium enterprise (SME), located in Jetis, Menoreh Village, Salaman, Magelang Regency. It processes approximately 150 kg of sweet potatoes daily to make traditional food grubi. The grubi production process, from washing to packaging, is still done manually, known as "gejrug." This manual washing process is time-consuming, labor-intensive, and unhygienic. The purpose of this community partnership program is to design and manufacture a sweet potato washing machine so that the washing process of sweet potatoes as a raw material for making grubi becomes more efficient and hygienic. The process becomes more efficient because the washing process takes less time and is more hygienic because the washing process is carried out using the help of a machine. This activity is carried out in four stages. The first stage is data collection as a basis for machine design and is continued in coordination with partners. The second stage is the construction and testing of the sweet potato washing machine. The third stage is the implementation of the sweet potato washing machine. The last stage is evaluation of machine implementation by the team. The efficiency of the sweet potato washing process is measured by calculating the washing time of 150 kg of sweet potatoes. The implementation of the sweet potato washing machine increases the washing process efficiency from 20 minutes to 5 minutes per 15 kg of sweet potatoes. The interview results show that the activity increases partners' understanding from 20% to 100%, about the more hygienic washing process of the sweet potato washing machine.
DAMPAK SUHU PIROLISIS TERHADAP KARBON AKTIF DARI BUNGA PINUS UNTUK MATERIAL PENDUKUNG KATALIS FUEL CELL Pebi Riyanto; Trisma Jaya Saputra; Rany Puspita Dewi; Sigit Mujiarto; Raka Mahendra Sulistiyo
Scientific Journal of Mechanical Engineering Kinematika Vol 11 No 1 (2026): SJME Kinematika June 2026
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v11i1.868

Abstract

The high cost and limited durability of platinum-based catalysts remain major challenges for the large-scale commercialization of fuel cell. Therefore, alternative and more affordable catalyst support materials are needed. Biomass derived activated carbon offers a promising solution due to its porous structure, good electrical conductivity, and abundant raw material availability. This study aims to investigate the potential of Pinus merkusii pine cones as a precursor for activated carbon through pyrolysis and chemical activation using potassium hydroxide (KOH), as well as to evaluate its suitability as a fuel cell catalyst support material. Pyrolysis was conducted at temperatures of 400ºC, 600ºC, and 800ºC under a nitrogen inert atmosphere, followed by chemical activation. The resulting activated carbon was characterized using proximate analysis and Brunauer-Emmett-Teller (BET) analysis. The results indicate that increasing the pyrolysis temperature led to a reduction in biochar yield, moisture content, ash content, and volatile matter, while consistently enhancing the fixed carbon content and specific surface area. The optimal condition was achieved at a pyrolysis temperature of 800ºC, producing activated carbon with the highest fixed carbon content of 81.87%, a specific surface area of 42.83 m2/g, and a mesoporous structure with an average pore diameter of 3.23 nm. Nevertheless, the obtained specific surface area remains below the ideal value (>100 m²/g) for application as a fuel cell catalyst support, indicating that the synthesized material still requires further optimization in both the process and activation conditions.
Mesin Chopper untuk Meningkatkan Kualitas dan Kuantitas Pakan Usaha Ternak Kambing “Arrahman” Rany Puspita Dewi; Trisma Jaya Saputra; Tri Puji Rahayu
Warta LPM WARTA LPM, Vol. 27, No. 3, November 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/warta.v27i3.6481

Abstract

The "Arrahman" partner is located in Kerten, Krincing Village, Secang District, Magelang manages around 200 to 300 goats. The process of preparing cattle fodder such as elephant grass and corn stalks is done manually using a knife. It causes the feed preparation process take longer considering the large number of goats being managed. The aim of this activity is to contrive and manufacture a chopper to help the process of cutting grass feed more effectively and efficiently. Because it is able to produce more feed capacity in a shorter time with a finer size. Activities are carried out in several stages. The first step is data accumulation and coordination together with partner. Continuing to the next step, the development of solving partner problems through chopper design. The method for measuring the efficiency and effectiveness of cutting cattle fodder is done by quantifying the capacity and quality of cattle fodder produced and quantifying the amount of rising in insight and knowledge of residents which is carried out by looking at before and after the application of the chopper. The primary result is a chopper with a capacity of 100 kg/hour with a 5.5 hp gasoline engine. Chopper parts can be disassembled and assembled, making it easier for partners to maintain and repair. The chopper increases the capacity of cutting animal feed to 100 kg/hour. The activity is able to increase residents' understanding and insight by up to 90%. It is because through design and construction activities, residents are able to understand and gain new insight into the process of making chopper machines.
Effect of Temperature on Slagging During Solid Refuse-Derived Fuel Combustion with Dolomite Additives: Pengaruh Temperatur Terhadap Slagging Pembakaran Bahan Bakar Jumputan Padat Dengan Penambahan Dolomit GALIH PRATAMA; Nur Hayati; Trisma Jaya Saputra
Teknosia Vol. 20 No. 1 (2026): Vol. 20 No. 01 (2026): June 2026
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/teknosia.v20i1.49163

Abstract

This research analyzes the effect of combustion temperature on slagging formation in Solid Refuse-Derived Fuel (SRDF) and evaluates the effectiveness of dolomite additives in mitigating this issue. While SRDF is a promising alternative fuel for co-firing systems, its high ash and alkali metal content often lead to slagging, which can impair combustion performance. The experimental method utilized a muffle furnace with temperature variations of 600°C, 700°C, and 800°C for a duration of 120 minutes. The SRDF samples consisted of an 8:2 ratio of organic to inorganic waste, integrated with 10% dolomite additive based on a 50-gram total sample mass. Observed parameters included slagging mass, slag distribution, and calorific value. The results indicate that temperature significantly influences slagging formation. Furthermore, the addition of dolomite effectively reduces slag formation by increasing the ash fusion temperature through the creation of calcium-based compounds. With the additive, the fuel achieved a calorific value of 4,013.09 cal/g, meeting national (SNI) standards. Ultimately, dolomite proves to be an effective solution for optimizing SRDF utilization as a sustainable energy source in co-firing applications.
ANALISIS KEKUATAN STRUKTUR DENGAN SAMBUNGAN LAS PADA STRUCTURAL PROFILE PENYANGGA PIPA DRAINASE DI GROUTING TUNNEL MENGGUNAKAN METODE FINITE ELEMENT ANALYSIS Aswin Prasetyo Nugroho; Raka Mahendra Sulistyo; R Faiz Listyanda; Trisma Jaya Saputra
BRILIANT: Jurnal Riset dan Konseptual Vol 11 No 3 (2026): Volume 11 Nomor 3, Agustus 2026
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v11i3.2484

Abstract

Welded joints are critical components in steel structures because they experience high stress concentrations and have the potential to cause structural failure. This study aimed to analyze the strength of welded joints on the structuraL Profile used as a drainage pipe support in a grouting tunnel using the Finite Element Analysis (FEA) method. The study employed a quantitative experimental approach through three-dimensional modeling and simulation using ANSYS software. The analysis focused on equivalent stress, total deformation, and safety factor under static loading conditions with variations in loading point distances of 17.5 cm, 35 cm, and 67.5 cm from the support point to evaluate the effect of load distribution on structural response. The results showed that the highest stress concentration occurred in the weld toe and weld root areas, which are critical regions susceptible to structural failure. Variations in loading position significantly affected the stress distribution and deformation of the structure, where greater loading distances from the support point tended to increase stress and deformation values. However, the structure still satisfied the minimum safety factor requirements based on AWS and AISC standards. The findings demonstrate that the FEA method is capable of effectively predicting structural behavior and providing recommendations for optimizing welded joint design in drainage pipe support structures.
Co-Authors Adityo Noor Setyo Hadi Dharmo Alfi Ferizqo Munawar Ari Wicaksono Aswin Prasetyo Nugroho Auzan Faizdaffa Hakim Bagus Fatkhurrozi Bagus Yustia Cahyo Sejati Dedek Arya Pangestu GALIH PRATAMA Herru Santosa Budiono Ibrahim Nawawi Muhammad Utsman Hanif Romadoni Namariq Masna Nani dkk. Mulyaningsih Nur Hayati Nurhadi Nurhadi Nurmala Dyah Fajarningrum Panca Putra Hasugian Pebi Riyanto R Faiz Listyanda Raka Mahendra Sulistiyo Raka Mahendra Sulistyo Ranny Puspita Dewi Rany Puspita Dewi Sigit Iswahyudi Sigit Joko Purnomo Sigit Mujiarto Sri Widodo Swastika Pascal Rafsanjanu Tri Puji Rahayu Vicky Khoirul Arzaq Wandi Arnandi Wegig Pranata Jaya Xander Salahudin