Resource utilization method of livestock and poultry breeding wastes

Abstract

The invention discloses a resource utilization method of livestock and poultry breeding wastes. The method comprises the following steps of carrying out solid-liquid separation on livestock and poultry breeding wastes to obtain solid manures and breeding wastewater, composting solid manures at a high temperature and carbonizing to prepare biomass carbon and carrying out biogas fermentation on the breeding wastewater and concentrating to obtain a liquid fertilizer. By adopting the method disclosed by the invention, livestock and poultry breeding wastes are subjected to optimal utilization in form of material and energy to obtain biomass carbon and the concentrated liquid fertilizer capable of being applied to the agricultural production and thus the resource utilization of wastes is achieved, and the recycling of resources can be realized inside a livestock and poultry breeding wastes treatment region to achieve the purposes of reducing energy consumption and pollutant emission.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of organic waste, and in particular relates to a method for resource utilization of livestock and poultry breeding waste. Background technique [0002] There are more than 14,000 large-scale livestock and poultry farms in my country, and the stock of livestock and poultry breeding is 12.36 billion heads (only) per year. The livestock and poultry breeding industry is an important industry related to the national economy and people's livelihood. However, in recent years, the problem of pollution prevention and control of livestock and poultry breeding waste in my country has become increasingly prominent. The national production of livestock and poultry manure is 2.5 billion tons per year, and the discharge of breeding wastewater exceeds 20 billion tons per year. About 80% of the breeding wastewater from farms is discharged without any treatment, which has become the main cause of the d...

AI Technical Summary

Problems solved by technology

Aquaculture wastewater contains a large amount of organic matter and nitrogen and phosphorus nutrients. It is a good organic fertilizer. Its resource utilization can be used to irrigate crops as base fertilizer and topdressing fertilizer. However, due to the high cost of pipeline transportation, the use of aquaculture wastewater crops is currently limited to surrounding farmland. , the radiation radius is shorter

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