Livestock waste nutrient recovery and water quality standard-reaching technical method

Abstract

The invention discloses a livestock waste nutrient recovery and water quality standard-reaching technical method. According to the invention, primary solid-liquid separation is carried out on livestock waste, the separated solid manure slag is taken as an organic fertilizer raw material nutrient for outward transport for sale for benefit-increasing cycle utilization or returning utilization, scientific circulation uses combination of farming and animal husbandry, urine through emission reduction, solid-liquid separating and interception, sewage and domestic water flow into an equalizing tank,a solid-liquid separating biological slag removal apparatus, a black film methane tank, a combination reaction environmental-protection pool, a MBR membrane pool, and a ball algae treatment pool in order for multilevel processing, during a whole process, solid-liquid-gas omnibearing processing utilization is carried out on waste, the method is characterized in that biogas is used for generating orproduction and living, the processed water is subjected to nutrient recovery and returning utilization, the filtered manure slag stockyard is subjected to organic fertilizer recovery or returning utilization, and the energy cycle utilization is realized. The processed reclaimed water through a chemical reaction can reach standard time-limited zero pollution discharge, and the environmental protection performance is good.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a process method for recovering nutrients from poultry and livestock waste and meeting water quality standards. Background technique [0002] my country's aquaculture industry developed relatively late. Since the reform and opening up, with the continuous improvement of people's living standards, the demand for meat, eggs, and milk has increased rapidly, and the aquaculture industry has also developed rapidly. However, while meeting the needs of people's lives, with the continuous expansion of the scale of livestock and poultry breeding, the concentrated production and random dumping of a large number of livestock and poultry excreta have also brought increasingly prominent environmental problems. [0003] It is estimated that in 2016, the country produced about 3.8 billion tons of livestock and poultry manure, which is several times the amount of industrial and domestic...

AI Technical Summary

Problems solved by technology

[0024] However, the above treatment methods have one thing in common, that is, only for the treatment of poultry pollutants, but do not consider the recycling of poultry pollutants at the same time, turning waste into treasure, the treatment effect is not very sufficient, and the energy saving and environmental protection have not been fully realized.

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