RECYCLE SYSTEM OF RESOURCES WHICH APPLIED COW EXCRETA

Development for recycle technology of the organic refuses is a subject to prevent environmental pollution and to secure natural resources. In a case of Japan, most of natural resources are imported from foreign countries. Therefore organic refuses are increasing and accumulating in any place of Japan. This is coursedby effect of global warming. We developed a recycle system of resources that is consisted from methane fermentation and composting. This recycling system was built in Hokkaido. Hokkaido is a famous place for dairy farming and approx. one million number of milk cows is keeping. In this system, cow excreta is converted to electric energy andmanure by microorganisms. In this report, we describe (1) summary of our recycle system which was built in Bekkai-cho, (2) results of fundamental study of seed microorganisms for startup of methane fermentation, (3) operational condition of methane fermentation, (4) effect of temperature on disinfection of pathogens, and (5) importance of recycle system and subject of methane fermentation.