Comprehensive treatment technology of farming excrement and mulching film non-point source pollution

Abstract

The invention discloses a comprehensive treatment technology of farming excrement and mulching film non-point source pollution. The technology comprises the following steps: (1) with a livestock excrement flocculation concentration squeezed separation treatment technology, adding a flocculating agent into the livestock excrement, separating the livestock excrement added with the flocculating agent by a mechanical roller screen, and dehydrating with a screw extrusion dehydrator; (2) performing sewage treatment by a modular sewage treatment equipment, wherein a modular A / O device, a flocculating agent adding device, a flocculation separation and disinfection integrated device and a solid-liquid separation squeezing device are adopted; (3) with a solid excrement acid removal thermal hydrolysis technology, performing solid excrement treatment in an acid removal thermal hydrolysis way; and (4) with a mulching film cracking technology, selecting the heating rate, pyrolysis temperature and catalyst and determining the heating rate and pyrolysis temperature of the technology and corresponding product recycling and environment-friendly treatment technology to realize an environmental protection effect of 'treating waste with waste' and avoiding secondary pollution.

Description

technical field [0001] The invention relates to a prevention and treatment process for livestock and poultry manure pollution and non-point source pollution of agricultural mulching film, in particular to a comprehensive treatment process for breeding manure pollution and non-point source pollution of agricultural mulching film. Background technique [0002] In recent years, with the continuous development of my country's economy and the adjustment of agricultural structure, the large-scale livestock and poultry breeding industry has developed rapidly and has become an important pillar in the development of my country's rural economy. [0003] With the rapid development of modern animal husbandry, large-scale and intensive farms have become the main direction of the current development of animal husbandry. There are about 4.3 million large-scale livestock and poultry farms in the country, which produce feces every year. About 3 billion tons. [0004] As the degree of inte...

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Problems solved by technology

[0014] For the problem that the thermal hydrolysis process requires external energy, the agricultural film cracking is used to generate combustible hydrocarbons, and the heat energy of the combustible hydrocarbons can meet the energy demand of the cracking and thermal hydrolysis process, and realize the coordinated environmental protection treatment and disposal of livestock and poultry manure and agricultural film non-point source pollution. Achieve the "win-win" effect of solving external energy sources and agricultural non-point source pollution

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