Mixed-methods assessment shows biogas systems can improve waste conversion and household energy supply.
Key Points
Biodigester produced 12 m³ of biogas daily, supporting 13 households with clean fuel and displacing firewood.
Organic waste represented 99.9% of market waste, contributing to reduced indoor PM2.5 from over 300 µg/m³ to below 50 µg/m³.
Operational efficiency of the biodigester was 57.7%, diverting 50.4 tonnes of organic waste annually and avoiding 28.05 tonnes of CO₂-equivalent emissions.
Biofertilizer yielded 200.02 m³/year with potential for producing 16 tonnes of maize, showing better results under irrigation.
Cite This Study
Hope Baxter Chamdimba (2025) studied this question.