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All Journal Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin ABDI MASSA: Jurnal Pengabdian Nasional
Kisto
Universitas Mangku Wiyata
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Public Health Other

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APLIKASI REKAYASA BIODIGESTER PORTABEL SI-BIMO: STRATEGI VALORISASI KOTORAN HEWAN MENJADI BIOGAS DAN BIO-SLURRY DI DESA KIBIN, BANTEN: SI-BIMO PORTABLE BIODIGESTER ENGINEERING APPLICATION: ANIMAL MANURE VALUIZATION STRATEGY INTO BIOGAS AND BIO-SLURRY IN KIBIN VILLAGE, BANTEN Muhammad Hardiman Nur Ramadhan; Sandra Mayang Dika Ridwan; Andriansyah; Supriyanto; Kisto; Woro Mustika Resmi
ABDIMAS Vol 6 No 04 (2026): PENGABDIAN MASYARAKAT
Publisher : COMMUNITY OF RESEARCH LABORATORY SURABAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69957/abdimass.v6i04.2804

Abstract

Desa Kibin, Kabupaten Serang, Provinsi Banten, memiliki kepadatan penduduk mencapai 8.700 jiwa yang didukung oleh pertumbuhan sektor industri sekunder dan aktivitas pertanian informal. Keberadaan peternakan komunal sapi potong dan ayam broiler menghasilkan limbah kotoran hewan dalam jumlah besar setiap hari. Pengelolaan limbah secara konvensional melalui open dumping menyebabkan pencemaran bau amonia (NH₃) yang mengganggu lingkungan permukiman serta meningkatkan emisi gas rumah kaca berupa metana (CH₄). Di sisi lain, masyarakat dan pelaku UMKM setempat masih bergantung pada LPG komersial dan pupuk kimia sintetis yang rentan terhadap fluktuasi harga. Program Pengabdian kepada Masyarakat (PkM) ini menawarkan solusi melalui inisiatif SI-BIMO (Sosialisasi Biogas Mandiri Optimal). Kegiatan dilaksanakan melalui perancangan dan instalasi biodigester portabel hibrida berkapasitas 200 liter berbahan High-Density Polyethylene (HDPE) yang dilengkapi gasket uniseal kedap udara. Proses fermentasi anaerobik dioptimalkan menggunakan aktivator Effective Microorganisms 4 (EM4) peternakan dan molase. Hasil commissioning test menunjukkan bahwa sistem beroperasi dengan sangat baik dan mampu menghasilkan nyala api biru yang stabil pada kompor gas termodifikasi. Selain menghasilkan biogas sebagai sumber energi alternatif, proses ini juga menghasilkan bio-slurry dengan kualitas agronomis yang baik, ditandai oleh kandungan nitrogen total sebesar 2,92% (fase cair), rasio C/N sebesar 9,09%, serta kandungan asam humat berkisar antara 10%–20%. Pemanfaatan bio-slurry terbukti meningkatkan kesuburan tanah dan mengurangi kebutuhan pupuk kimia hingga 8%–14%. Implementasi teknologi ini juga berkontribusi pada pengurangan pengeluaran energi rumah tangga. Evaluasi hasil kegiatan menunjukkan bahwa tingkat pemahaman dan keterampilan mitra dalam pengoperasian sistem meningkat hingga lebih dari 80%. Secara keseluruhan, SI-BIMO berhasil mengubah limbah peternakan yang semula menjadi sumber pencemaran menjadi aset ekonomi sirkular yang mendukung kemandirian energi, ketahanan pangan, dan pembangunan berkelanjutan berbasis masyarakat.
ANALYSIS OF THE EFFECT OF ELECTRODE TYPE VARIATION AND PWHT TEMPERATURE VARIATION ON SMAW WELDING ON THE IMPACT STRENGTH AND BENDING OF ST 42 STEEL Muhammad agung nadjmi nasution; Kisto
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/bnfdf348

Abstract

ST 42 steel is a medium carbon steel that is widely used in the construction and shipping industries because it has high strength and ability to accept heat treatment. However, the welding process using the Shielded Metal Arc Welding (SMAW) method often causes residual stress that can reduce the quality of the weld joint. To overcome this, Post Weld Heat Treatment (PWHT) is needed to reduce residual stress, refine the microstructure, and improve the mechanical properties of the weld. This study aims to analyze the effect of variations in electrode types (E7016 and E7018) and PWHT temperatures (500°C and 600°C) on the flexural strength and toughness of ST 42 steel weld joints. The welding process was carried out at position 1G, then the specimen was given PWHT for 60 minutes. Testing was carried out using a bending test to assess flexural strength and an impact test to measure the toughness of the joint. The results showed that PWHT had a significant effect on improving mechanical properties. In the bending test, the highest strength was achieved by the E7016 electrode with PWHT 600°C of 940.808 MPa, while the lowest value was shown by the E7018 electrode without PWHT of 572.607 MPa. In the impact test, the highest toughness was obtained by the E7018 electrode with PWHT 600°C of 1.72 J/mm², and the lowest value was found in the E7016 electrode without PWHT of 1.20 J/mm². Thus, PWHT is proven to increase the flexural strength and toughness of the connection, while the electrode selection must be adjusted to the application needs, both for flexural resistance and toughness against dynamic loads..
INFLUENCE OF ELECTRODE TYPE ON THE MECHANICAL PROPERTIES OF THE RESULT AISI 1018 STEEL SMAW WELDING Deny Wakhyudi; Kisto
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/6swg4257

Abstract

The mechanical and physical characteristics of a welded joint are greatly influenced by the choice of electrode type and the applied current. Therefore, this research was conducted to evaluate the impact of these two variables on specimen performance, which includes macro-micro review, hardness mapping, and tensile strength. Experiments were conducted using the Shielded Metal Arc Welding (SMAW) method on AISI 1018 steel material with a constant welding rate. The test involved three electrode variants (E6013, E7016, and E7018) combined with three current levels (70A, 110A, and 130A). Based on the analysis results, it was proven that the current plays a vital role in changing material properties. An inverse correlation was found: increasing the welding current consistently triggered a decrease in both hardness and tensile strength. Regarding the comparison between electrodes, the most optimal hardness level reached 105 HRB obtained from the combination of the E7018 electrode with a current setting of 70A. On the other hand, the maximum tensile strength was recorded at 34.697 MPa, which was produced through the use of E6013 electrodes at a current strength of 110A.
Co-Authors Andriansyah Deny Wakhyudi Muhammad agung nadjmi nasution Ramadhan, Muhammad Hardiman Nur Sandra Mayang Dika Ridwan Supriyanto Woro Mustika Resmi