Make a Biogas Generator to Produce Your Own Natural Gas

Transform grass clippings, food waste and livestock manure into renewable biogas energy with a homemade biogas generator.

Biogas Generator Materials Graph
Freshly cut grass clippings can produce about 11/2 cubic feet of biogas per pound. At this rate, about 20 pounds of grass clippings will generate one hour of cooking fuel (grass silage is even better, requiring only about 10 pounds to produce this same amount of biogas). One cow will produce about 140 pounds (18 gallons) of manure each day, which could ultimately generate, on average, 85 cubic feet of biogas, or about three hours of daily cooking fuel.
Illustration courtesy Bavarian Association for the Promotion of Solar Energy