METHANE FERMENTATION METHOD OF ORGANIC WASTE AND SYSTEM THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a methane fermentation method of organic waste and system therefor which enable reduction of the production rate of residual and sludge accompanying organic waste treatment and enable the efficient recovery of a biogas containing methane. SOLUTION: The methane fermentation system is provided with a solubilizing tank 4 which solubilizes organic waste, a solid-liquid separator 7 which separates solubilized material produced in the solubilizing tank into solubilized liquid and solubilized residue, a mesophilic methane fermentation tank 14 which subjects the solubilized liquid to anaerobic fermentation at a temperature of 33∼40°C and a thermophilic fermentation tank 37 which subjects the solubilized residue to anaerobic fermentation at a temperature of 50∼58°C. COPYRIGHT: (C)2004,JPO