A small, small system made from a 55-gal drum will accept about 3 gallons of waste per week and make enough fuel to cook as many meals. A larger system (like the Homebiogas 7) will accept about 250lbs of food waste per week and makes about 6 hours of cooking fuel per day on a 2-burner stove. It takes about 30 days for the biome in a biodigester to get up and running and make fuel reliably. Setting up a small biodigester takes the good part of a day. Tending a biodigester requires feeding scraps daily/every other day and periodically emptying the effluent bucket.
Appears in: FAQ