Deep treatment process for wastewater at tail end of livestock breeding pollution

Abstract

The invention relates to a deep treatment process for wastewater at the tail end of livestock breeding pollution. The deep treatment process comprises the following steps that a flocculating agent isadded into to-be-treated wastewater at the tail end of livestock breeding pollution, and reaction sedimentation treatment is carried out to obtain a supernatant and sludge A; ozone is introduced intothe supernatant in step S1, and H2O2 is added to obtain a degradation solution; the degradation solution is subjected to repeated AO treatment, and MBR membrane reaction treatment is carried out to obtain sludge B and clear water. The deep treatment process for the wastewater at the tail end of livestock breeding pollution has the advantages that cooperative treatment of ozone oxidation, a multistage AO process and an MBR membrane process is utilized, so that an effluent is superior to new standard requirements, the removal efficiency of each pollutant is high, the removal rate of CODCr is 75%or above, the removal rate of BOD5 is 80% or above, the removal rate of SS is 65% or above, the removal rate of ammonia nitrogen is 70% or above, and the environmental benefits are significant.

Description

technical field [0001] The invention relates to an advanced treatment process for waste water at the polluted end of livestock and poultry breeding, belonging to the field of water treatment. Background technique [0002] As a national key pollution prevention and control industry, the livestock and poultry breeding industry needs to be further emphasized and strengthened. In order to ensure the healthy and sustainable development of the livestock and poultry breeding industry, the state will further increase the control requirements for the discharge of water pollutants from the livestock and poultry breeding industry . The advanced treatment of wastewater at the end of livestock and poultry breeding has attracted great attention from farm owners and relevant departments. It is urgent to adopt a series of end treatment measures and select economical and efficient advanced treatment technologies. [0003] As the national sewage discharge standards are being updated day by d...

AI Technical Summary

Problems solved by technology

The organic matter in the terminal wastewater is relatively complex, mainly composed of complex macromolecular structures in the feces. The easily degradable organic matter has been treated at the front end, and the organic matter remaining in the terminal water is more difficult to degrade, and contains antibiotic pollutants; the terminal wastewater ammonia nitrogen, total Nitrogen concentration is high, and part of the raw water needs to be diverted to the terminal wastewater as a carbon source supplement when considering the process; the chromaticity of the terminal wastewater of livestock and poultry breeding is still high, although the discharge standard does not require chromaticity, but the effluent color is too high. Water quality and appearance have a great impact, and discharge into the water body directly affects the production and life of surrounding residents, so the advanced treatment process needs to consider reducing the chroma

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