Method for preparing fertilizer by using domestic sludge

Abstract

The invention discloses a method for preparing a fertilizer by using domestic sludge, which comprises the following steps of: (1) reducing the water content of the domestic sludge to be less than 60 percent; (2) crushing; (3) adding aerobic biological strains and accessories to perform high-temperature fermentation on the domestic sludge till thorough decomposition; (4) supplying oxygen to the domestic sludge and turning; (5) after the compost is thoroughly decomposed, crushing the blocky sludge; (6) adding nutrients; (7) stirring; and (8) preparing a granular or powdery organic fertilizer. The method realizes sterilization, ova killing, uniform fermentation and stable quality; and the prepared fertilizer is used for agricultural and forest production, and fulfills the purpose of recycling resources.

Description

Domestic sludge fertilizer method technical field The invention relates to a method for making fertilizer from domestic sludge. Background technique In any country, the treatment and utilization of sludge needs to proceed from the national conditions of the country, not only the geographical environment and land resources of the country, but also the energy, economic strength and technological level of the country. For example, Japan, Switzerland, Sweden and other countries with small land and developed economy and technology often use incineration, melting and solidification; processing waste, etc.) as supplementary energy; France and Spain adopt drying reduction and agricultural use; most of the sludge in Italy is landfilled, and a small part is dried and used as building materials, which is rarely used in agriculture and is almost not allowed to be burned. In my country, sanitary landfill, dry incineration, traditional composting and other methods are used to treat dom...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the defects of various domestic sludge treatment methods in the prior art and provide a method for producing fertilizer with domestic sludge as raw material

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