Process and system of producing organic fertilizer by anaerobically fermenting excrement of livestock and poultry

Abstract

The invention discloses a process and a system of producing organic fertilizer by anaerobically fermenting excrement of livestock and poultry, wherein the process includes the following steps: 1) crushing crop straw into powder via a straw crusher, and feeding the straw powder into a straw bin; 2) collecting the excrement of livestock and poultry in an excrement bin; 3) outputting the straw powderand the excrement of livestock and poultry under metering control and delivering the materials into a stirring apparatus via a delivery device, and stirring the mixture, wherein anaerobic fermentation bacteria are added with uniform mixing; 4) conveying the stirred material into a bundling and coating device to bundle and coat the mixture, and storing the packed material in a natural environmentto perform anaerobic fermentation in a sealing status, so that the organic fertilizer is produced by completely fermenting and composting the excrement of livestock and poultry and straw. In the invention, the organic fertilizer is produced from the excrement of livestock and poultry and crop straw, so that problems of pollution due to livestock and poultry and incineration of straw are solved from the source, and pollution on water body, farmland and atmosphere and environment pollution due to incineration of straw are reduced. The system is reliable in operation and allows the bundling and film-coating operations to be carried out in one step, thus achieving automatic continuous operation. The method is effective for processing the excrement of livestock and poultry and the farmland waste straw.

Description

technical field [0001] The invention belongs to the technical field of anaerobic fermentation, and relates to a process and a system for producing organic fertilizer by anaerobic fermentation of livestock and poultry manure and crop stalks and the like. Background technique [0002] In my country, there are nearly 5 billion tons of waste every year, and the annual discharge of livestock and poultry manure such as pigs, cattle, sheep, chickens, and ducks alone has reached 3.8 billion tons, and crop straw has reached 1 billion tons. At present, the comprehensive utilization rate of livestock and poultry manure is less than 60%, and the utilization rate of crop straw is even lower. More than 30% of livestock and poultry manure is directly discharged into the surface, causing pollution to water bodies, farmland, and the atmosphere; and environmental pollution caused by crop straw burning is also becoming more and more serious. [0003] Accelerating the utilization of livestock ...

AI Technical Summary

Problems solved by technology

At present, the comprehensive utilization rate of livestock and poultry manure is less than 60%, and the utilization rate of crop straw is even lower.

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