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All Journal Publikasi Pendidikan Jurnal Simetris Jurnal Simantec SITEKIN: Jurnal Sains, Teknologi dan Industri Journal of Energy, Mechanical, Material and Manufacturing Engineering Infotekmesin STEAM Engineering : Journal of Science, Technology, Education And Mechanical Engineering Community Development Journal: Jurnal Pengabdian Masyarakat International Journal of Science, Engineering and Information Technology Jurnal Pengabdian kepada Masyarakat Nusantara GUYUB: Journal of Community Engagement Civitas Ministerium: Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Masyarakat dan Riset Pendidikan Widya Teknik PROCEEDINGS CONFERENCE ON DESIGN AND MANUFACTURE AND ITS APPLICATION
Rifky Maulana Yusron
UNIVERSITAS TRUNOJOYO MADURA
Religion Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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Journal : Jurnal Simetris

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Physical Characterization of Briquettes Composed of Corn Cob and Sawdust Waste Mixtures Yusron, Rifky Maulana; Budiarto, Hairil; Irawan, Ibnu
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol 15, No 2 (2024): JURNAL SIMETRIS VOLUME 15 NO 2 TAHUN 2024
Publisher : Fakultas Teknik Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/simet.v15i2.11657

Abstract

Corncobs were agricultural waste, while sawdust was waste of furniture industries.  Both materials can well decomposition naturally, but it was still time-consuming. The aim of this research to provide both wastes by converting them into sustainable and worthwhile solid-fuels briquettes format. In this research, variation of mixture ratio of corn cob powder and sawdust in briquettes used was 50:50, 60:40, 70:30, 80:20, and 90:10. 1:1 ratio of tapioca starch and water was used as the adhesive to bond the briquette mixture well. Compaction process used hydraulics by 2 tons pressing load. Testing of physical characteristics includes calorific value, moisture, and ash content. The lowest calorific value was 4589.94 kCal/g, which was achieved in the 50:50 mixture of corn cob and sawdust. The highest calorific value was 6579.87 kCal/g, which was achieved in the combination of a corn cob and sawdust ratio of 90:10. The calorific value continued to increase with more mixture of corn cob. Highest moisture content was 20.00%, achieved in 50:50 combination mixture of corn cob and sawdust. Moisture content decreased as the ratio of corn cobs used in the briquettes increased, with the lowest content obtained at 8.88% using a 90:10 mixture of corn cobs and sawdust. Highest ash content on this research 16.85%, was achieved in the 50:50 combination of corncob and sawdust. Ash content also tended to decrease with the increase of corn cob powder used in the briquettes. Lowest ash content was obtained at 10.10% using a mixture of corn cob and sawdust 90:10.
Job Safety Analysis of Confined Space on Fertilizer Division on Seasoning Industries Rifa'i, Emon; Yusron, Rifky Maulana; Kam, Booi
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol. 16 No. 2 (2025): JURNAL SIMETRIS VOLUME 16 NO 2 TAHUN 2025
Publisher : Fakultas Teknik Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/simet.v16i2.15861

Abstract

Confined space activities in fertilizer production present significant risks, including toxic gas exposure, oxygen deficiency, fire and explosion hazards, and physical or ergonomic challenges. This study applies the Job Safety Analysis method to systematically identify hazards, assess risks, and establish effective control measures during the repair and maintenance of the FRP Pond 22000 Kl at the fertilizer division on seasoning industry. The methodology consisted of six structured stages: job selection, task breakdown, hazard identification, risk control, verification, and monitoring. Hazard identification was carried out through field observation, consultation with Health, Safety, and Environment officers, and adherence to national regulatory standards. Results revealed that atmospheric testing prior to entry was essential, with oxygen levels recorded at 20.8% and toxic gases, within safe limits. The JSA identified potential risks at each task stage and applied control measures following the hierarchy of controls, including engineering controls ventilation, and gas detection. While administrative measures section permit towork system, time restrictions, and health certificates. On energy isolation is installation Lock Out Tag Out. The essential is mandatory of personal protection equipment. Collaborative inspections by contractors, supervisors, and Health, Safety, and Environment staff reinforced compliance and improved communication. The study concludes that job safety analysis is not only a compliance requirement but also a practical framework for hazard anticipation, safety culture reinforcement, and operational continuity. It is recommended that future practice integrates digital job safety analysis systems, real-time monitoring, and enhanced training to strengthen confined space safety in fertilizer production and other high-risk industries.
Co-Authors Aldila Septiana Anindita Trinura Novitasari Anis Arendra Dahda, Said Salim Dhika Aditya Purnomo Didik Hermanto Doni Abdul Fatah Elly Ismiyah Emon Rifa'i emon rifai'i Hairil Budiarto Hidayat Hidayat Hidayat, _ Ibnu Irawan Imam Hanafi Irma Dila Febrianti Kam, Booi Khoirul Hidayat Mirza Pramudia Moh Jufriyanto Moh. Jufrianto Mohamad Mustajib, Mohamad Mohammad Jufriyanto Mohammad Safiudin Muhammad Zainur Ridlo Nina Aini Mahbubah Nisa Isrofi nuruddin, mochammad Okie Maria Amul Husnah R.A Rica Wijayanti Rahayu Mekar Bisono Ria Kristia Fatmasari Rica Wijayanti RICA WIJAYANTI Rica Wijayanti Wijayanti Rica Wijayanti, Rica Rifa'i, Emon Rifai, Emon Rohmat -, Rohmat sabarudin ahmad Safiudin, Mohammad Saiful Arif Sholeh, Yusrianto Teguh Prasetyo Teguh Prasetyo Tidar, Feri Prakus Yuli Handayani, Heni Yulia Nur Ainiyah Zainudin Zainudin