Large-scale livestock breeding sewage treatment method and equipment

Abstract

The invention provides a large-scale livestock breeding sewage treatment method. The large-scale livestock breeding sewage treatment method comprises the following steps of: step a. carrying out physicochemical treatment on livestock breeding sewage by adopting a chemical agent, so that soluble ammonia nitrogen and phosphorus in the livestock breeding sewage form ammonium phosphate crystals, then removing the ammonium phosphate crystals formed in the sewage and suspended organic pollutants together through flocculation; step b. carrying out biochemical treatment on the sewage treated in the step a, and further removing soluble organic pollutants in the sewage; and step c. using a part of treating water treated in the step b as flushing water for colony houses of livestock, thus realizing the cyclic utilization of sewage. The invention also provides large-scale livestock breeding sewage treatment equipment. The large-scale livestock breeding sewage treatment equipment provided by the invention can be used for preventing pollution caused by livestock sewage breeding and realizing recycle processing and cyclic utilization of breeding sewage.

Description

technical field [0001] The invention belongs to the field of livestock and poultry breeding sewage treatment, in particular to a large-scale livestock and poultry breeding sewage treatment method and equipment. Background technique [0002] With the reform and opening up and economic development, my country's animal husbandry has developed rapidly. A large number of large-scale livestock and poultry farms have been built around large and medium-sized cities. Untreated livestock and poultry excrement and urine sewage directly flow into rivers and lakes, resulting in a large amount of nitrogen and phosphorus loss, resulting in water pollution and eutrophication. Damage to the natural ecological environment. Therefore, strengthening the pollution prevention and control of the livestock and poultry breeding industry has become the top priority of the rural environmental protection work at this stage and in the future, and it is an urgent and urgent task. [0003] In recent yea...

AI Technical Summary

Problems solved by technology

If the supernatant is used as circulating water after simple settling, the accumulation of pollutants will inevitably occur during its circulation, which will eventually lead to the failure of the circulation process

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