Method for preparing organic fertilizer with municipal sludge

Abstract

The invention relates to a method for preparing an organic fertilizer with municipal sludge, which comprises the steps of: firstly mixing municipal sludge with 66%-74% water content and a Furde microbe starter fully in proportion by weight of 1000:5, then putting in a fermentation pool for natural fermentation after fully mixing with sheep manure and wheat grass in proportion, overturning in the fermentation process and stopping the fermentation until accumulated temperature reaches a rang between 1450 DEG C to 1700 DEG C. Designed according to cycle of ordinary inedible plant, the method can obtain the organic fertilizer by utilizing rich microbial population in the microbe starter, taking the sheep manure as microbe adhered reproduction carriers and high voidage of the wheat grass to decompose and ferment nutrient elements in the sludge, and the organic fertilizer can effectively improve the nutrient release efficiency of the sludge, prolong the nutrient release cycle, improve the utilization efficiency of the sludge, reduce the production cost of the fertilizer, effectively improve soil structure, and accelerate the soil-ripening for newly-assarted farmlands.

Description

technical field [0001] The invention belongs to the technical field of fertilizer production, in particular to a method for preparing organic fertilizer from urban sludge. Background technique [0002] For a long time, the use of fertilizers in gardens, green spaces, and afforestation processes has mainly been fermented animal manure and straw landfills. The problems are: 1. Increasing production costs; 2. Waste of agricultural production materials; 3. Short fertilizer use cycle ; 4. The contribution rate to the environment is low. [0003] In recent years, with the operation of sewage treatment plants in cities, especially some large and medium-sized sewage treatment plants, the sludge production has also increased rapidly while the sewage treatment rate in my country has continued to increase. How to treat and dispose of these sewage Mud has always been a matter of concern from all sides. Studies have shown that urban sludge contains a large amount of organic matter, nitr...

AI Technical Summary

Problems solved by technology

At present, the main fermentation mode of urban sludge fermentation fertilizer is to dehydrate the sludge and then dry it at high temperature, and then produce it with auxiliary materials such as slag and animal manure. The problems of this kind of sludge fertilizer are: 1. Sludge fermentation Incomplete, the nutrients in the sludge cannot be effectively decomposed; 2. Due to the use of slag, the organic nutrient content of this fertilizer is reduced; 3. Due to the high temperature dehydration process, the microbial population in the fertilizer is completely lost; 4. This fertilizer low in organic nutrients