Process for treating livestock and poultry breeding sewage entering Lake Taihu

Abstract

The invention relates to a process for treating livestock and poultry breeding sewage entering the Lake Taihu. According to the designed and adopted treating process, the technology that primary precipitation and filtration, anaerobic-aerobic biochemical treatment, dosing flocculation and coagulation reactions and membrane module filtration are combined is mainly used, and a material method for adding a compound water treatment agent is adopted, so that efficient denitrification, dephosphorization and COD reduction functions are realized; meanwhile, the process has good decoloration and sterilization effects. According to the process, the operation cost and the management cost are low, the sewage treatment effect is good, and treated livestock and poultry breeding sewage can reach the state-specified first-class discharge standard for sewage treatment in Lake Taihu regions.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and mainly aims at the treatment of livestock and poultry breeding sewage at the lake entrance along the Taihu Lake, and provides a process for treating the livestock and poultry breeding sewage entering the Taihu Lake. Background technique [0002] At present, along the Taihu Lake, due to the high attention and strict supervision of government departments at all levels, the treatment and discharge of industrial enterprise sewage can basically meet the standards. There are still many livestock and poultry breeding sites at the entrance of Taihu Lake, including many agricultural demonstration parks. Due to the typical "three highs" characteristics of livestock and poultry farm sewage, CODcr is as high as 3000-12000mg / l, and ammonia nitrogen is as high as 800-2200mg / l , P exceeds the standard by dozens of times, limited to the livestock and poultry breeding industry is a small prof...

AI Technical Summary

Problems solved by technology

[0002] At present, along the Taihu Lake, due to the high attention and strict supervision of government departments at all levels, the treatment and discharge of industrial enterprise sewage can basically meet the standards. There are still many livestock and poultry breeding sites at the entrance of Taihu Lake, including many agricultural demonstration parks. Due to the typical "three highs" characteristics of livestock and poultry farm sewage, CODcr is as high as 3000-12000mg / l, and ammonia nitrogen is as high as 800-2200mg / l , P exceeds the standard by dozens of times, limited to the livestock and poultry breeding industry is a small profit industry, and there are still great technical and economic difficulties in meeting the emission standards. The reason is that the sewage from thousands of breeding farms and agricultural demonstration parks along the Taihu Lake has not been treated up to the standard.

Although some large-scale farms and agricultural demonstration parks have set up simple sewage treatment equipment and facilities, due to their simple equipment and facilities and single treatment process, UASB+SBR process, ZWD new biogas digester + biological cycle treatment process, etc. The advanced anaerobic or aerobic process treatment is not suitable for farm sewage, the treatment effect is not ideal, the effluent water quality cannot meet the sewage discharge standard above the second level in the Taihu Lake area, or the normal application cannot be popularized due to the high cost

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