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<p>This study explores the feasibility of ultra-low-cost anaerobic digesters (&lt; $20) for biogas production from household organic waste in the Euro-Mediterranean region, with experiments conducted in Sfax, Tunisia. The waste types evaluated include vegetable and fruit peels, coffee grounds, tea residues, meat and fish scraps, and mixed waste. Key parameters optimized include moisture content (70–85%) and digestion duration (0–63&#xa0;days). Results revealed that the highest biogas yield (1.8&#xa0;L/kg) was achieved with mixed waste at 70% moisture content after 49&#xa0;days of digestion. Although the energy density of biogas (0.06444&#xa0;MJ/kg) is lower than that of fossil fuels such as oil (42&#xa0;MJ/kg) and natural gas (50.67&#xa0;MJ/kg), the study highlights the environmental benefits of biogas, notably its significantly lower CO<sub>2</sub> emissions (0.0225–0.0315&#xa0;kg CO<sub>2</sub>-eq/kg). The findings emphasize the economic and practical feasibility of implementing biogas systems in resource-constrained communities, providing a sustainable alternative for waste management and renewable energy production. This research underlines the potential of biogas technology to enhance energy independence and reduce environmental impacts, particularly in rural and underserved regions of the Euro-Mediterranean area. Furthermore, it offers novel insights into the practicality and scalability of low-cost anaerobic digestion systems for a more inclusive energy transition.</p>

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Optimizing biogas production from household waste: an economical approach to energy and environmental sustainability in rural areas

  • 期刊论文

  • 发表日期：

    2025年4月24日

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  • Siwar SAKKA

摘要

This study explores the feasibility of ultra-low-cost anaerobic digesters (< $20) for biogas production from household organic waste in the Euro-Mediterranean region, with experiments conducted in Sfax, Tunisia. The waste types evaluated include vegetable and fruit peels, coffee grounds, tea residues, meat and fish scraps, and mixed waste. Key parameters optimized include moisture content (70–85%) and digestion duration (0–63 days). Results revealed that the highest biogas yield (1.8 L/kg) was achieved with mixed waste at 70% moisture content after 49 days of digestion. Although the energy density of biogas (0.06444 MJ/kg) is lower than that of fossil fuels such as oil (42 MJ/kg) and natural gas (50.67 MJ/kg), the study highlights the environmental benefits of biogas, notably its significantly lower CO2 emissions (0.0225–0.0315 kg CO2-eq/kg). The findings emphasize the economic and practical feasibility of implementing biogas systems in resource-constrained communities, providing a sustainable alternative for waste management and renewable energy production. This research underlines the potential of biogas technology to enhance energy independence and reduce environmental impacts, particularly in rural and underserved regions of the Euro-Mediterranean area. Furthermore, it offers novel insights into the practicality and scalability of low-cost anaerobic digestion systems for a more inclusive energy transition.