Farm Biodigesters: Turning Agricultural Waste into Clean Energy Farm biodigesters are a powerful example of how agriculture and renewable energy can work together. The image shows an underground biogas digester installed on a farm, where animal manure and organic waste are transformed into clean energy and natural fertilizer, creating a closed-loop, sustainable system. How a Farm Biodigester Works Organic waste such as cow manure, pig waste, and food residues is collected and fed into an airtigh