METHOD FOR PRODUCING METHANE GAS AND COMPOST BY USING BIOMASS RESOURCES

摘要

The present invention pertains to a method for producing methane gas and fermentation-derived compost by performing methane fermentation more efficiently using a method having a small burden on the external environment. In this method for producing methane gas and compost, in a piece of equipment for methane fermentation in which a roughly pulverized product of biomass resources is loaded, and reaction water containing a methanogen is sprayed from above the loaded object so that the loaded object undergoes a methane fermentation reaction, the amount of water contained in resulting fermentation-derived compost is greater than or equal to an amount obtained by subtracting the amount of water consumed in the fermentation reaction from the amount of water contained in the biomass raw material, and the amount of water contained in the fermentation-derived compost is at most 75 wt%. The present invention is also a method which is for producing methane gas and compost and in which a pair of methane fermentation tanks are used, and at the time that spraying of reaction water is started and thereby a methane fermentation reaction is started in one of the methane fermentation tanks, a reaction stop operation of ending a methane fermentation reaction is performed in the other methane fermentation tank, and the amount of inert gas introduced into the other fermentation tank is substantially equal to the amount of biogas generated in the one fermentation tank.