Method for preparing nutrient soil by performing mixed aerobic fermentation on sewage plant dewatered sludge and fly ash

The invention provides a method for preparing nutrient soil by performing mixed aerobic fermentation on sewage plant dewatered sludge and fly ash. The mass ratio of the sludge to the fly ash is 1:0.7-1:1. The method provided by the invention can effectively reduce the environmental hazards respectively caused by the sludge and fly ash. The sewage plant dewatered sludge and fly ash are major problems which are faced by the municipal department at present, and favorable treatment measures can not be easily found. The combination of the sewage plant dewatered sludge and fly ash for preparing the nutrient soil solves the two problem at one time. 1 ton of dewatered sludge can consume about 0.7-1 ton of fly ash.