TREATMENT METHOD AND EQUIPMENT FOR ORGANIC WASTE CONTAINING SALTS

摘要

PROBLEM TO BE SOLVED: To produce a good compost which does not give rise to a salt damage from an organic waste containing salts and to effectively utilize generated methane gas to power generating, heating and warming. SOLUTION: The organic waste containing the salts is subjected to desalting treatment by desalting equipment 3, 6 and 9 and are then subjected to methane fermentation treatment in a methane fermenter 10. A generator 13 is driven by generated methane-containing gas, by which electric power is generated. The waste combustion gas thereof is utilized for a heat source for temperature control of the methane fermenter 10. The post-fermentation liquid from the methane fermenter 10 is subjected to a separation of solid from the liquid in a filter machine 17 and is separated to a solid slurry and a waste liquid. The solid slurry is dried by a drying machine 21 using the waste combustion gas from the generator 13 as a heat source until the moisture content suitable for composting is attained. The resultant dry matter is composed in a primary fermenter 22 and a secondary fermenter 23.