METHANE FERMENTATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a methane fermentation method in which the liquid waste generated when methane fermentation is performed can be treated stably with activated sludge while reducing the cost required to cool the liquid waste. SOLUTION: The methane fermentation method comprises the steps of: supplying organic waste to a slurry preparation tank 10 to slurry the supplied organic waste; throwing the slurry in the slurry preparation tank 10 into a methane fermentation tank 20 to methane-ferment the thrown slurry; and throwing the liquid waste, which is generated when the slurry is methane-fermented, into a liquid waste treatment tank 40 to treat the thrown liquid waste with activated sludge. A diluting water to be supplied to the slurry preparation tank 10 and/or the methane fermentation tank 20 is heat-exchanged with the liquid waste to be discharged from the methane fermentation tank 20 and the heat-exchanged diluting water is supplied to the slurry preparation tank 10 and/or the methane fermentation tank 20. COPYRIGHT: (C)2008,JPO&INPIT