Method and system for treating livestock and poultry culture wastewater

Abstract

The invention relates to a method and a system for treating livestock and poultry culture wastewater, and belongs to the field of control of water pollution in environment engineering. The method comprises the following steps of separating solid and liquid of the livestock and poultry culture wastewater, further coagulating and precipitating to remove suspended solids in the wastewater; hydrolyzing the wastewater after removal of suspended solids, completely mixing, adjusting and homogenizing the quality and quantity of wastewater, and converting macromolecular organic pollutants into degradable micromolecular organic matters; adopting an anaerobic ammonia oxidation technique to remove the organic pollutants and ammonia-nitrogen in the wastewater; adopting an anoxic-aerobic technology to further degrade the organic matters in the wastewater, removing nitrogen and phosphor, and then separating sludge and water; finally, coagulating and precipitating again, and draining the up-to-standard effluent. The method has the advantages that the solid pollutants in the livestock and poultry culture wastewater are removed, and the organic pollutants and ammonia-nitrogen pollutants in the wastewater are effectively removed by steps and stages, so that the up-to-standard water can be drained; the technology is reliable, the treatment effect is good, and the running cost is low.

Description

technical field [0001] The invention relates to a waste water treatment method and system, in particular to a high ammonia nitrogen livestock and poultry breeding waste water treatment method and system, belonging to the field of water pollution control of environmental engineering. Background technique [0002] Livestock and poultry breeding wastewater is the wastewater produced during the process of cleaning livestock manure during livestock and poultry breeding. Large-scale farms discharge a large amount of livestock and poultry breeding wastewater every day. This wastewater contains a large number of pollutants, such as suspended solids, COD, ammonia nitrogen, Phosphate, heavy metals, residual veterinary drugs and a large number of pathogens, etc., if discharged directly without treatment, will cause serious pollution to the surrounding environment, which will have an extremely bad impact on our lives. At present, as far as the treatment of livestock and poultry wastewat...

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Problems solved by technology

[0005] Although the above documents all involve the treatment of aquaculture wastewater, due to the complex content of organic pollutants in aquaculture wastewater, not only macromolecular organic matter, ammonia nitrogen, but also a certain amount of phosphorus, the above methods cannot effectively remove the pollutants in the wastewater , so it is still necessary to improve

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