Method for producing methane by first heating and mixing an organic substrate to 70.degree. C. and cooling same with fresh substrate to 50.degree.-60.degree. C. in an antechamber, transferring same to a processing chamber in the presence of methane-producing anaerobic microorganisms and therein cultivating...http://www.google.ca/patents/US4481293?utm_source=gb-gplus-sharePatent US4481293 - Method for the production of methane
