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All Journal Rotasi Jurnal Kreativitas PKM PEDULI: Jurnal Imiah Pengabdian Pada Masyarakat Indonesian Journal of Community Dedication Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Journal of Applied Science, Engineering, Technology, and Education Jurnal Bakti Masyarakat Indonesia Academia Open Journal La Multiapp Indonesian Journal of Innovation Studies Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Eduvest - Journal of Universal Studies Madani : Jurnal Pengabdian Kepada Masyarakat Nemui Nyimah
Damora Rhakasywi
UNIVERSITAS PEMBANGUNAN NASIONAL VETERAN JAKARTA
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Other

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Analysis of Biopellets from a Mixture of Coffee Grounds and Sawdust as an Alternative Energy Source: Analisis Biopelet Dari Campuran Ampas Kopi dan Serbuk Gergaji Sebagai Sumber Energi Alternatif Sutarya, Muhamad Farad; Rhakasywi, Damora; Fahrudin, Fahrudin
Academia Open Vol. 10 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.10.2025.12889

Abstract

Background: Indonesia’s growing energy demand and dependence on fossil fuels necessitate renewable alternatives such as biomass-based biopellets. Specific Background: Coffee grounds and sawdust are abundant organic wastes with complementary thermal and mechanical properties suitable for pelletization. Knowledge Gap: However, limited studies have clarified how varying proportions of these materials influence biopellet quality relative to SNI 8021:2020 standards. Aims: This study evaluates the effects of four ratios of coffee grounds–sawdust mixtures (80:20, 70:30, 60:40, 50:50) on physical and proximate characteristics of biopellets. Results: One-way ANOVA and Tukey HSD (p < 0.05) showed significant differences across all parameters. Formulations A and B produced the highest calorific values (4674–4689 cal/g) meeting SNI requirements, while B achieved the highest density (560.34 kg/m³). Moisture and ash contents also met standards; however, density and fixed carbon fell below SNI thresholds due to the absence of torrefaction. Novelty: This study demonstrates that optimizing coffee grounds–sawdust mixtures alone cannot meet all quality indicators without thermal pretreatment. Implications: Incorporating torrefaction and enhanced pressing conditions is essential to improve energy density and combustion stability, supporting the development of high-quality waste-based biofuel in Indonesia. Highlights: The optimal calorific value is achieved with higher proportions of coffee grounds (80:20 and 70:30). Density and fixed carbon remain below SNI standards due to the absence of torrefaction. Thermal pretreatment is essential to improve combustion stability and overall pellet quality. Keywords: Biopellet, Coffee Grounds, Sawdust, Biomass Energy, Torrefaction
Co-Authors Abhitah, Athallah Nabiel Amir Marasabessy Armansyah Armansyah Ashfi Rayhan, Fajri Asrianti, Nadia Putri Bambang Sudjasta Bambang Sudjasta Budhi Martana Christoforus Deberland David, Jerico Dewi, Talitha Cahya Kemala Didit Widiyanto Diraharja, Rifat Satrio Dora Samaria Fahrudin Fahrudin Fajri Ashfi Rayhan Febriana, Miftakhul Jannah Francisco, Jeremi Harinaldi . Kusumo, Rayhan Suryo Lina Ayu Marcelina Nur Cholis Nurzati, Syarif Adhika Adhin Pamungkas, Eny Dewi Prasetyo, Eko Andi Rachman, Muhammad Nanda Fatur Rita Ismail Rizkiati Ramadhani, Mahirah Salwa Aurelia Ananda Rosidi, Erlia Nurbayti Shafa, Naura Sudjasta, Bambang Sulistyawati, Wiwin Suryo, Taufik Hadi Sutarya, Muhamad Farad Wiwin Sulistyawati