Methane fermentation method, methane fermentation system, waste recycling method and waste recycling system

摘要

A methane fermentation method for producing biogas containing methane from raw material containing at least one of glycerol and fatty acid glycerol esterMixing ingredients and inorganic acidsA first separation step for separating the first oil and the first glycerol containing solutionNeutralization process for neutralizing primary glycerol containing solution by alkaline materialFrom the neutralized primary glycerol containing solutionA second separation step for separating the second oil and the deposited inorganic salt to obtain a second glycerol containing solutionFermentation process for methane fermentation using secondary glycerol containing solutionMethane fermentation method comprising comprising.According to the present invention, biogas containing methane can be efficiently produced from glycerol containing waste or waste containing glycerol ester.The recovery rate of methane from glycerol containing waste becomes drastically larger than in the conventional method.