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All Journal AUSTENIT Turbo : Jurnal Program Studi Teknik Mesin Jurnal Teknologi Terapan Jurnal Teknologi dan Riset Terapan (JATRA) DEVICE MACHINERY: Jurnal Teknologi Terapan Journal of Applied Mechanical Engineering and Renewable Energy (JAMERE) Jurnal Pengabdian kepada Masyarakat (Nadimas) Journal of Applied Mechanical Technology (JAMET) Jurnal Sains, Teknologi dan Kesehatan Jurnal Polimesin
Nur Rohmat, Yusup
Politeknik Negeri Indramayu
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences

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PERANCANGAN BIOGAS MODEL LANDFILL GAS SEBAGAI BAHAN BAKAR ALTERNATIF Rohmat, yusup Nur; Sukroni, Sukroni; Haris, Emin; Endramawan, Tito; Andrian, Muhammad
EMPIRIS : Jurnal Sains, Teknologi dan Kesehatan Vol. 1 No. 3 (2024): EMPIRIS : Jurnal Sains, Teknologi dan Kesehatan, September 2024
Publisher : Lembaga Pendidikan dan Penelitian Manggala Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62335/1jvqzy72

Abstract

The use of cooking fuel, both in businesses and households, is essential, especially given the lack of alternatives to LPG following the fuel transition. The rise in global oil prices due to fuel shortages has become a global issue. Biogas, produced through the anaerobic fermentation of organic waste by bacteria, generates methane gas that can be utilized as an alternative energy source. Therefore, a landfill gas model biogas machine was designed to convert organic waste, such as cow manure and tofu liquid waste, into alternative fuel. The machine is equipped with a microcontroller system for automatic valve operation and gas pressure monitoring. Static load simulation on the machine frame using SolidWorks software showed that the maximum stress experienced was 10.4 x 10^6 N/m², well below the material's yield strength of 203.9 x 10^6 N/m², indicating safety. The displacement simulation on the machine frame ranged between 0.1–0.2 mm in the loaded areas, and the resulting factor of safety (FOS) was 19.5, signifying a highly safe design (FOS > 1).
RANCANG BANGUN DAN PENGUJIAN MESIN PENGADUK SUSU KEDELAI DENGAN VARIASI BENTUK PENGADUK Irawan, Candra; Suwandi, Dedi; Kusmayadi, Adi; Rohmat, Yusup Nur
MACHINERY Jurnal Teknologi Terapan Vol. 5 No. 3 (2024): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14241897

Abstract

Haurgeulis District in Indramayu Regency is known as one of the areas producing quality soybeans. In this region, many mothers who are members of UMKM take advantage of this potential by producing soy milk. However, the process of making soy milk is still manual, one of which is the stirring stage during heating. This often results in inconsistent results and requires quite a lot of effort. To overcome this problem, research was carried out to design and build a soy milk mixing machine expected to increase production efficiency and quality, as well as support UMKM in developing their businesses. The purpose of this design is to make the mixing process easier, the method used is how much power is needed, how much production capacity, how much electricity is used, and which form of the stirrer can produce fast, consistent, and even mixing. The result of this design is a motor power of around 0.18 kW. Apart from that, stirrer C required the shortest time with an average of 2.54 seconds. The process of cooking milk in one production of 4 liters takes 1 hour and 6 minutes over low heat. At 100 rpm rotation, the power consumed is 844.2 W. The electricity costs to operate this machine are around IDR 7,000-IDR 10,000 per month to produce 1 hour per day.
RANCANG BANGUN MESIN CETAK ECO PAVING BLOCK PNEUMATIK BERBASIS LIMBAH PLASTIK Kusmayadi, Adi; Sukroni, Sukroni; Haris, Emin; Irawan, Candra; Rohmat, Yusup Nur; Syaifurrahman, Arief; Gunawan, Leo Van; Ghozali, Muhamad
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.715

Abstract

The escalating volume of plastic waste has become a critical environmental challenge, highlighting the need for innovative solutions to repurpose it into valuable construction materials. This study aimed to design and develop a pneumatic-based eco-paving block printing machine that uses plastic waste as its primary raw material. The research methodology encompassed the design and simulation of pneumatic circuits, structural analysis involving stress distribution, displacement, and factor of safety (FOS), and strength testing of the fabricated eco-paving blocks. The machine was equipped with a pneumatic cylinder measuring 80 × 75 mm, operating at a pressure of 6 bar and generating a maximum pressing force of 300 kg. The simulation results confirmed that the maximum stress and displacement remained within safe limits, with a minimum FOS of 8.4, thereby ensuring a stable and reliable design. Testing of the eco-paving blocks revealed compressive strengths ranging from 38 to 54 MPa, surpassing the requirements of the SNI 03-0691-1996 standard. This study demonstrates that a pneumatic-based eco-paving block printing machine effectively transforms plastic waste into high-quality construction materials compliant with national standards, offering a practical solution to the plastic waste crisis while promoting sustainability in the construction industry.
PEMBUATAN DAN PENGUJIAN VARIASI PEMBEBANAN TERHADAP WAKTU YANG DIBUTUHKAN MESIN PEMISAH SARI PATI KEDELAI UNTUK PABRIK TAHU Farhan, Ahmad; Ghozali, Muhamad; Novrianda, Raju; Afnanto, Nurul; Nur Rohmat, Yusup; Sukroni, Sukroni; Gunawan, Leo Van; Pradana, Claudha Alba
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 7 No. 1 (2025): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v7i1.9372

Abstract

In Lohbener Village, Indramayu Regency, small and medium enterprises (SMEs) produce tofu using traditional methods, where the soybean pulp filtering process requires significant time and physical effort. To address this issue, a soybean pulp filtering machine was developed to improve filtering efficiency. The machine was tested with three different input loads—5 kg, 10 kg, and 15 kg—at a constant speed of 57 rpm. The filtering times recorded were 3 minutes 10 seconds, 5 minutes 17 seconds, and 8 minutes 21 seconds, respectively, determined by the point at which no more liquid discharged from the system. The final weights of the filtered soybean pulp were 1.5 kg, 5.7 kg, and 7.4 kg, respectively. These weight differences were influenced by an unbalanced soybean-to-water ratio, which affected extraction effectiveness. The average moisture content of the filtered pulp was 18% for the 5 kg load, 14.90% for 10 kg, and 15.17% for 15 kg. These results indicate that the use of the filtering machine significantly improves filtering efficiency compared to manual methods, in terms of time, output, and pulp quality. Overall, the machine has a positive impact on increasing productivity and product quality in tofu production at the SME level.
Pengujian dan Analisa Biogas Model Landfill Sebagai Bahan Bakar Alternatif Rohmat, Yusup Nur
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 1 (2025): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i1.3981

Abstract

Dalam dunia usaha komersial dan domestic, kebutuhan bahan bakar untuk memasak semakin meningkat karena semakin terbatasnya alternatif bahan bakar LPG pasca transisi bahan bakar, namun tantangan yang dihadapi semua negara pada dasarnya sama. Persoalannya, harga minyak dunia sedang naik karena kelangkaan bahan bakar atau kelangkaan bahan bakar yang semakin meningkat. Biogas merupakan penguraian sampah organik oleh bakteri melalui proses fermentasi anaerobik sehingga menghasilkan gas metana yang dapat diolah. Tujuan dari penelitian ini adalah untuk mengetahui suhu, tekanan dan durasi nyala api biogas yang dihasilkan dari campuran limbah cair kotoran sapi dan ampas tahu. Penelitian ini menggunakan 3 variasi perbandingan volume campuran limbah cair kotoran sapi dan ampas tahu yaitu B1 (50%:50%), B2 (70%:30%), dan B3 (90%:10%) dengan penambahan air sebanyak 2,5 liter untuk setiap variasi. Pengumpulan data dilakukan selama 7 hari pada pukul 17.00. Perbandingan terbaik pada penelitian ini ditunjukkan pada variasi campuran 50:50. Hal ini dikarenakan jumlah variasi campuran kotoran sapi, ampas tahu, dan air yang seimbang mempengaruhi proses fermentasi pembentukan biogas sehingga menghasilkan produksi biogas yang lebih cepat dan nilai tekanan yang lebih tinggi. Hasil penelitian menyimpulkan bahwa waktu fermentasi selama 7 hari menghasilkan gas metana 83,824 ppm, gas H2S 28,886 ppm, tekanan 1,4 psi, dan suhu 34,16 0C. Nyala api berlangsung selama 4 menit 36 detik.
PERANCANGAN MESIN PELET IKAN UNTUK MENINGKATKAN PRODUKTIVITAS BUDIDAYA PERIKANAN Nur Rohmat, Yusup; Ghozali, Muhamad; Haris, EMin; Endramawan, Tito
Jurnal Pengabdian kepada Masyarakat (NADIMAS) Vol 4 No 1 (2025): Jurnal Pengabdian kepada Masyarakat (Nadimas)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/nadimas.v4i1.88

Abstract

Indramayu is the largest rice barn area in Java, so it contributes waste from the rice production process, but the waste processing process is less productive or there are very few enthusiasts. So there is a very big opportunity by utilizing waste which is more useful, namely by processing it into fish pellets which have a high price value compared to other processing methods. The design of the rice husk grinding machine uses a type 32 disk mill knife and a type 32 fish pellet printer that will print 3 mm pellets with a machine frame dimension of 849 x 597 x 918. The frame of this machine uses 40 x 40 x 1.35 mm hollow iron. The specifications of this fish machine consist of three main components, namely a husk refiner, a pellet dough mixer, and a fish pellet molder driven by a combustion engine with the motor power and speed used, namely a refiner power of 1.82 HP with a speed of 3600 rpm, a mixer power of 1.86 HP with a speed of 771.42 rpm, a molding power of 0.56 HP with a speed of 771.42 rpm. So the total power used for this machine is 5.5 HP or 4.1 kw. So it can be seen that the motor power is 5.5 HP < 7 HP, so a 7 HP drive motor can be used.
PERANCANGAN DAN PENGUJIAN ALAT PENGASIN TELUR BEBEK DENGAN AIR COMPRESSION PRESSURE Rohmat, Yusup Nur; Hidayat, Kusnandar; Canra, Delffika; Suliono, Suliono; Haryadi, Haryadi; Priyatna, Hendar
AUSTENIT Vol. 13 No. 2 (2021): AUSTENIT: Oktober 2021
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The traditional method of making salted eggs usually using the salting, which is done well, its needs time about 14 days. This condition indicated to have a method that can speed up the process of salting the eggs. The process of salting eggs normally uses the usual soaking method where the eggs are coated with bricks and rubbing ash then left to stand. The diffusion of salt penetration in traditional salting takes place slowly. For this reason, the speed of salt penetration can be done by increasing the salt level in the soaking solution so that the penetration of salt into the eggs can take place faster. This methodology in this research study using of air pressure to speed up the process of salting the eggs. The method used is to use air pressure with the use of compressor air pressure at a pressure of 4 - 6 Bar with a salting test time of about 4 to 7 hours
PENERAPAN TEKNOLOGI MESIN PENGERING BIJI KOPI MENGGUNAKAN SISTEM SOLAR PANEL Rohmat, Yusup Nur; Luthfi, Muhammad; Kusmayadi, Adi; Setiawan, Nanang; Susanto, Ferdian Dwi
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4551

Abstract

Penelitian ini mengintegrasikan perancangan, pembuatan, dan pengujian mesin pengering biji kopi berbasis energi terbarukan menggunakan sistem panel solar untuk meningkatkan efisiensi proses pascapanen. Mesin dirancang dengan rangka besi hollow galvanis (50 × 50× 0,8 mm), tabung pengering berkapasitas ±2–2,4 kg, motor listrik 0,5 HP, gearbox rasio 1:20, serta sistem transmisi gear dengan total rasio 69 yang menghasilkan putaran 20,29 RPM dan torsi 175,624 N·m. Desain mesin dibuat menggunakan perangkat lunak SolidWorks 2022 dan diuji melalui simulasi statik, dengan hasil menunjukkan tegangan maksimum 1,177 MPa, deformasi 0,012 mm, serta faktor keamanan mencapai 174 sehingga rangka aman digunakan. Perhitungan efisiensi termal mencapai 67,36% dengan daya heater 500 Watt yang menghasilkan energi panas 3600 kJ dan diserap 2425,1 kJ oleh biji kopi. Proses fabrikasi dilakukan melalui tahapan marking, cutting, rolling, bending, welding, assembly, wiring, dan finishing dengan material utama besi hollow, plat galvalum, dan plat jaring stainless steel. Pengujian kadar air biji kopi dilakukan dengan variasi waktu 20, 40, dan 60 menit, namun hasil signifikan baru dicapai setelah 3 jam 30 menit ketika kadar air turun dari 26% menjadi 12% sesuai standar SNI, dengan massa berkurang dari 1320 gram menjadi 695 gram. Sebagai pembanding, metode pengeringan manual menggunakan sinar matahari memerlukan waktu ±3–4 minggu untuk mencapai kadar air serupa. Hasil penelitian menunjukkan bahwa mesin pengering kopi berbasis panel solar mampu mempercepat proses pengeringan secara signifikan, lebih konsisten, ramah lingkungan, tidak bergantung pada kondisi cuaca, serta berpotensi meningkatkan produktivitas petani kopi di Indonesia.
Effect of anode–cathode distance and anodizing time on hardcoat anodizing of AA7075 Endramawan, Tito; Haris, Emin; Rohmat, Yusup Nur; Irawan, Candra
Jurnal Polimesin Vol 24, No 1 (2026): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i1.6194

Abstract

Fishing activities in Indramayu ( a seaside city in West Java) typically use boats powered by propellers. These propellers often strike floating objects, resulting in damage such as cracked or broken blades. A survey revealed that the fractures are mainly caused by the poor quality of propellers produced using the gravity casting technique, which results in rough surfaces with pores and cracks that initiate during finishing. Therefore, surface repair is necessary, and one potential method is hardcoat anodizing. This study aims to investigate the effect of coating time and anode–cathode distance on the hardness of the oxide layer formed during the hardcoat anodizing process of AA7075 aluminum alloy. The anode–cathode distances were 5 cm, 10 cm, and 15 cm, with coating times of 40, 50, and 60 minutes. The process was conducted at 2 to 3°C, with a current of 5.12 A and a voltage of 31.5 V. The results of micro-Vickers hardness testing, conducted with a loading parameter of 200 gf and an indentation time of 15 seconds, indicated a hardness increase of 256% compared to the base material. The highest hardness value was achieved at a distance of 5 cm and a coating time of 60 minutes, measuring 322.9 VHN, with a resulting layer thickness of 67.16 µm.
Design and performance test of a water hyacinth (Eichhornia crassipes) and coconut shell charcoal briquette mixing machine Rohmat, Yusup Nur; Kusmayadi, Adi; Sugara, Ferry; Apriansyah, Riza; Agustin, Neli
Jurnal Polimesin Vol 24, No 1 (2026): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i1.7712

Abstract

Dependence on fossil fuels such as oil and natural gas gives rise to various problems, including rising energy prices, limited supply, and environmental impacts in the form of high carbon emissions. Therefore, efforts are needed to develop alternative energy sources based on local raw materials such as biomass briquettes which can be made from various organic waste, such as water hyacinth and coconut shells. The objectives of this research focus on the design, manufacture, and performance testing of briquette mixing and molding machines, as well as analysis of the quality of briquettes produced from a mixture of coconut shell charcoal and water hyacinth with the addition of paraffin wax as an adhesive. The machine was designed using dimensions of 1000×500×500 mm, equipped with a spiral mixer supported by an S45C steel shaft. This research presented a method of making briquettes with various compositions of water hyacinth and a mixture of coconut shell charcoal and paraffin wax as adhesives, and tested for calorific value, ash content, and combustion rate. The best results were obtained from a mixture of 70% coconut shell charcoal, 30% water hyacinth, and 5% paraffin wax, with a calorific value of 6.285 cal/g, an ash content of 2%, and a stable combustion rate of 0.12–0.16 g/min. The addition of paraffin wax has been shown to improve combustion stability and energy efficiency. The research results show that the designed mixer and briquette press machine function effectively, and briquettes made from biomass waste with natural adhesives have great potential as an environmentally friendly and economical alternative fuel.
Co-Authors Abda Abda Adi Kusmayadi Afnanto, Nurul Agustin, Neli Ahmad Farhan, Ahmad Apriansyah, Riza Ardiyansyah Yatim Badruzzaman Badruzzaman Bobi Khoirun Candra Irawan Candra Irawan Delffika Canra Endramawan, Tito Felix Dionisius Ferry Sugara, Ferry Haris, Emin Haryadi - Hidayat, Kusnandar Jos Istiyanto Kusmayadi, Adi Kusnandar Kusnandar kusnandar kusnandar Kusnandar Kusnandar Leo Van Gunawan Luh Putu Ratna Sundari M. Idrus Al Hamid Muhamad Ghozali Muhamad Ghozali, Muhamad Muhammad Andrian, Muhammad Muhammad Luthfi Novrianda, Raju Octavianus Ardhian Nugroho Pradhana, Claudha Alba Priyatna, Hendar Rachmatullah Rizki Adila Saputro Rizky Maulana Akbar Saputro, Rizki Adila Sukarno, Nota Ali Sukroni, Sukroni Suliono Suliono Suliono Suliono Sunaryo Susanto, Ferdian Dwi Suwandi, Dedi Syaifurrahman, Arief Wardika Yudhy Kurniawan