METHOD FOR JOINT COMPOSTING OF CITY MUNICIPAL WASTES (VERSIONS) Russian patent published in 2011 - IPC C05F7/00 C05F9/00 

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture and city municipal engineering, ecological biotechnology and may be used to recycle sediment of waste waters. Method of wastes composting according to the first version includes mixing of ground wood wastes and waste waters sediments and soaking for ripening. Wood wastes are disperse wood chips, which are mixed with mixture of waste waters sediments and excessive active sludge of treatment facilities in amount of 20-40 wt % of dry substance with moisture of 60-80%, and this mixture is fermented in methane tanks. In process of mixing compost is periodically saturated with additive in amount of 5-20% of dry substance selected from the following group: raw sediments of waste waters with moisture of 80-90%, excessive active sludge of treatment facilities, by dry substance, with moisture of 90-99%, mixture of raw sediments of waste waters and excessive active sludge or treatment facilities with moisture of 80-90%. Method of wastes composting according to the second version includes mixing of ground wood wastes, waste waters sediments, solid domestic wastes and soaking for ripening. Wood wastes are disperse wood chips. Solid domestic wastes are residue of undersize fraction of solid domestic wastes produced after screen sizing. Components are mixed with mixture of waste waters sediments and excessive active sludge of treatment facilities in amount of 10-40 wt % of dry substance with moisture of 60-80%, and this mixture is fermented in methane tanks. In process of mixing compost is periodically saturated with additive in amount of 5-20% of dry substance selected from the following group: raw sediments of waste waters with moisture of 80-90%, excessive active sludge of treatment facilities with moisture of 90-99%, mixture of raw sediments of waste waters and excessive active sludge or treatment facilities with moisture of 80-90%. Wood chips are used with size of not more than 10-30 mm. For ripening compost is maintained from 1 to 4 months, during which absolute moisture of compost is maintained within 55-65% in whole volume of mixture at periodical aeration, control of temperature and moisture in compost.

EFFECT: method makes it possible to simplify process of recycling wastes of woodworking production facilities and sediments of waste waters, to improve quality and expand sphere of composts application.

6 cl, 3 tbl