METHOD OF PREPARATION COMPOST FROM SEWAGE SLUDGE (VERSIONS) Russian patent published in 2014 - IPC C05F7/00 

FIELD: agriculture.

SUBSTANCE: method of preparation compost from sewage sludge comprises mixing of fresh sewage sludge with the retention period of less than 3 years with the organic component, which is used as sawdust of any tree species, with the addition of bioactivator and subsequent aerobic composting of the resulting mixture, and prior to mixing the components the layering of sawdust with humidity of 30-40% and sewage sludge, which humidity is 79-81% is carried out, in a ratio of 3:1, at that the dust is subjected to bioactivation by spraying with the working solution of preparation EM-1 "Baikal" at a consumption rate of 5 liters per 1 t at its concentration in the working fluid of 0.0001%, in addition, the aerobic composting of the resulting mixture is carried out in storage pits, at that when the temperature of the composted mixture reaches 50-60°C the mixture is incubated for 20 days, after which the break-in of the storage pit is repeatedly carried out for 2 months with the intervals of 15-20 days, followed by aging of compost for 14-15 days.

EFFECT: invention enables to provide the low-cost environmentally friendly organic fertiliser, to resolve the problem of disposal of sewage sludge.

4 cl, 3 tbl, 2 ex