METHOD AND APPARATUS FOR TREATING ORGANIC SOLID WASTE

摘要

PROBLEM TO BE SOLVED: To provide a treatment system capable of decreasing the amount of solid residues to be generated and economically recovering methane gas at a high efficiency, regarding a system for recovering methane gas by carrying out methane fermentation of organic solid wastes. SOLUTION: The organic solid waste treatment method includes the steps of (1) subjecting organic solid wastes to methane fermentation; (2) solid-liquid- separating the fermented products into a treated liquid and solid matter; and (3) biologically solubilizing at least some of the solid matter soluble by thermophilic bacteria and the treated liquid after the solubilization treatment is subjected to the methane fermentation step (1). The apparatus is for carrying out these steps.