| abstract |
(57) [Summary] [PROBLEMS] To efficiently eliminate pollution by subjecting wastewater, sludge, human excreta and the like of a final treatment plant to odorless fermentation, and to recycle it as a useful organic fertilizer. SOLUTION: A mixed moisture control material such as coffee grounds, sawdust, rice bran, straw and the like is preliminarily fermented in a separate tank, and a water control material fermented at about 50 ° C. is put into a fermentation tank, and miscellaneous wastewater, starch lees, Spray and agitate sludge, human manure, etc. so that the moisture content is about 60%, which is easy to ferment. Spraying, stirring and aeration are repeated, and the water is evaporated while maintaining a high fermentation temperature of about 80 ° C. Odorless fermentation for 2 to 3 months to obtain an organic fertilizer that has been subjected to pollution-free treatment. |