METHOD FOR RECOVERING ENERGY BY RAPID ANAEROBIC FERMENTATION TREATMENT OF FINE GRINDING RICE STRAW, AND METHOD FOR RECOVERING FERMENTATION GAS IN SOIL BY FERMENTATION GAS CIRCULATION

摘要

PROBLEM TO BE SOLVED: To provide a means which raises fermentation efficiency of rice straw dramatically by anaerobic fermentation which can collect high-definition biomass energy not mixing an additive to rice straw, and to provide a means to collect a lot of anaerobic fermentation gas which contained in paddy soil of a flooding state at high efficiency.SOLUTION: An anaerobic fermentation treatment method comprises mixing rice straw made fine to a section whose major axis is at most 9 mm into paddy soil of a flooding state to be presented for anaerobic fermentation. A method for recovering energy comprises mixing rice straw made fine into paddy soil of a flooding state to be presented for anaerobic fermentation, and collecting formed fermentation gas by a sealed container which is installed at an upper surface of the paddy soil. A method for recovering fermentation gas in soil comprises collecting anaerobic fermentation gas formed from paddy soil of a flooding state, then circulating the anaerobic fermentation gas in the paddy soil with a pipe line system to be blown off, and making a lot of anaerobic fermentation gas which stays in paddy soil surface on flooding to be collected.