Power generating method for hydrogen production, involves converting heat energy around heat gas flow from exhaust stream of aerobic fermentation process through heat exchanger, Peltier unit, and another heat exchanger to fresh-air flow
DE4107340A1
Process for composting organic waste
DE3040543A1
Biological decay heat utilisation equipment - has heat pump combined with decay box
DE2705720A1
Continuous sludge composting silo having stacked tanks - each with rotatable base with aperture to discharge into tank below