Comprehensive treatment method for livestock and poultry breeding wastewater

Abstract

The invention discloses a comprehensive treatment method for livestock and poultry breeding wastewater. Breeding wastewater flows through an anaerobic pond, a reaction tank, a sedimentation tank and an ecological pond after being subjected to solid-liquid separation pretreatment, and then outlet water is drained after reaching the standard. A wastewater treatment agent is added in the reaction tank and is prepared from, by weight, 45-55 parts of blast furnace slag, 22-25 parts of sodium carbonate, 10-15 parts of poly dimethyl diallyl ammonium chloride, 6-9 parts of titanium dioxide, 8-10 parts of activated carbon, 3-5 parts of zeolite powder and 70-80 parts of water. By means of the method, C, N and P in wastewater are effectively removed, outlet water stably reaches the standard, the average removal rate of COD can reach 99% or above, the removal rate of ammonia nitrogen can reach 97% or above, the removal rate of total phosphorus can reach 99% or above, the recycling rate of energy is high, and operation is stable; the ecological pond treatment method has the basic advantages that pollution transfer is avoided, emission reduction is guaranteed, full ecologic coverage is achieved, and full biological treatment is achieved, and complete treatment of wastewater, sludge and dirt is achieved.

Description

technical field [0001] The invention belongs to the field of livestock and poultry wastewater treatment, and in particular relates to a comprehensive treatment method for livestock and poultry breeding wastewater. Background technique [0002] With the improvement of residents' living standards, the increase in demand for meat promotes the vigorous development of aquaculture, which leads to a sharp increase in the emission of pollutants from the aquaculture industry. According to the analysis of the "First National Pollution Source Survey Bulletin" released in February 2010, livestock and poultry The COD and ammonia nitrogen emissions from the breeding industry are 12.6826 million tons and 717,300 tons respectively, accounting for 41.9% and 41.5% of the national COD and ammonia nitrogen emissions. [0003] At present, the main treatment modes of aquaculture wastewater are returning to fields, returning to forest resources, recycling and anaerobic + aerobic biological treatme...

AI Technical Summary

Problems solved by technology

Returning fields and forests covers a large area, and is affected by weather and seasons, which cannot meet the wastewater treatment requirements of large-scale farms; traditional anaerobic + aerobic biological treatment has low biogas production, single biogas utilization methods, high investment, and energy consumption Large size, high operation requirements, long construction time, poor water stability, foul odor and foam, etc.

Images