A practical village biogas system for wastes and agricultural residues

A low-capital biogas system for production of fuel gas from available organic residues is described with application to developing countries. As a specific example, the village of Nawagi in the SWAT Province of Pakistan was selected for presenting calculations. The system described is based on recent experience with fuel gas recovery from municipal solid waste (MSW) landfill sites via anaerobic digestion and from experiments on batch anaerobic digestion of combined agriculture residues. The “process” is low capital cost and a simple batch anaerobic digestion of the combined organic residues available from a populous area including: all municipal wastes (solid wastes, garbage, sewages sludge); industrial residues such as those from food processing; and agricultural residues such as wheat, rice, and barley straws as well as animal manures.