International Journal of Natural Science Studies and Development (IJOSS)
Focus The International Journal of Natural Science Studies and Development (IJOSS) is an academic journal dedicated to disseminating the latest and most innovative research in the field of natural sciences. IJOSS provides a platform for researchers, academics, and practitioners to publish high-quality research findings related to various disciplines within the natural sciences. The journal is committed to supporting scientific and technological advancement through the publication of articles that significantly contribute to the understanding and application of natural sciences. The International Journal of Natural Science Studies and Development (IJOSS) focuses on publishing high-quality research articles, literature reviews, and case studies in the field of natural sciences. Scope: Biological Sciences: Research related to living organisms, ecology, genetics, microbiology, botany, zoology, evolutionary biology, living organisms, ecosystems, genetics, biotechnology, and environmental biology. Chemistry: Research on chemical reactions, chemical substances, synthesis, materials chemistry, and environmental. Physical Sciences: Studies in physics, earth sciences, meteorology, environmental science, fundamental principles of physics, applied physics, materials physics, and nuclear physics. Interdisciplinary Natural Sciences: Integration of natural sciences with other disciplines, including biochemistry, biophysics, environmental science, and materials science. Developmental Studies: Research on the application of natural science principles in technology, environmental sustainability, and socio-economic development. Environmental Studies: Articles addressing climate change, pollution control, conservation efforts, and sustainability practices. Agricultural Sciences: Research focusing on agronomy, soil science, plant pathology, entomology, crop management, crop production, agricultural biotechnology, sustainable farming practices, and pest management. Natural Resource Management: Studies on the sustainable use and management of natural resources like water, forests, and minerals. Civil Engineering: Research that explores the intersection of natural sciences and civil engineering, including structural engineering, environmental engineering, geotechnical engineering, and sustainable infrastructure development. Scientific Methodology: Innovative methods and approaches in conducting and applying natural science research. Geosciences: Research on geological processes, geography, geophysics, and environmental changes.
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"Vol. 2 No. 2 (2025): IJOSS"
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Sustainable Conversion of Mixed Organic Waste into High-Quality Bio-Briquettes through Controlled Carbonization and Densification for Community-Based Energy Systems
Rahmat Sabani;
Ari Handono Ramelan;
Surya Abdul Muthalib;
Yuhendra AP
International Journal of Natural Science Studies and Development (IJOSS) Vol. 2 No. 2 (2025): IJOSS
Publisher : PT Inovasi Pratama Internasional
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DOI: 10.55299/ijoss.v2i2.37
The conversion of organic waste into renewable solid fuel represents a promising strategy to simultaneously address waste management challenges and local energy demand. This research evaluates the technical performance, energy characteristics, and environmental implications of producing bio-briquettes from mixed organic waste through controlled carbonization and densification. Mixed organic biomass representative of community waste streams was carbonized using an insulated drum retort under controlled temperature conditions, followed by grinding and densification with a starch-based binder and a low-dose potassium nitrate additive. The resulting bio-briquettes were characterized in terms of physical, mechanical, thermal, and combustion properties. In addition, mass and energy balance analyses and a cradle-to-gate life cycle assessment were conducted to evaluate process efficiency and environmental performance. The results demonstrate that carbonization temperature strongly influences char yield and fuel quality, with optimal performance observed at approximately 400 °C. Under these conditions, the bio-briquettes achieved a high calorific value of approximately 24.3 MJ kg⁻¹ (≈ 5,800 kcal kg⁻¹), high density, adequate compressive strength, and stable combustion behavior. The addition of potassium nitrate significantly improved ignition performance when applied at appropriate concentrations. Life cycle assessment results indicate that bio-briquette production from mixed organic waste results in substantially lower greenhouse gas emissions compared with fossil fuels delivering equivalent energy. Overall, this research confirms that bio-briquettes derived from mixed organic waste represent a technically feasible and environmentally sustainable waste-to-energy solution suitable for decentralized, community-based energy systems.