METHOD FOR TREATING ORGANIC WASTE

摘要

PROBLEM TO BE SOLVED: To remarkably decrease amt. of addition of an oxidizing agent for solubilization and to decrease cost for treatment in a method wherein after org. waste is methane-fermented, it is solubilized by adding the oxidizing agent and methane fermentation is furthermore performed to reduce the vol. SOLUTION: After digested sludge prepd. by methane fermentation in an anaerobic treating tank 1 is aerated in an aeration tank 2 to remove reductive substances in the digested sludge, an oxidizing agent such as ozone and hydrogen peroxide is added in an modifying tank 3 to solubilize it and methane fermentation is furthermore performed in the anaerobic treating tank 1. It is possible to decrease amt. of the oxidizing agent consumed by these reductive substances by removing the reductive substances in the digested sludge by aeration before adding the oxidizing agent.