A kind of pig farm wastewater advanced treatment and resource recycling method

A pig farm wastewater and advanced treatment technology, which is applied in the direction of animal husbandry wastewater treatment, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problem of inability to realize the resource utilization of coagulation sludge and the inability to reflect the removal effect of TP and COD , Dealing with high cost and other issues, achieving the effect of realizing high value-added recycling, realizing resource utilization, and simple operation
CN106995223BActive Publication Date: 2020-01-17SOUTH CHINA AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA AGRI UNIV
Publication Date
2020-01-17

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Abstract

The invention discloses a piggery wastewater advanced treatment and resource recycling method. The method comprises the following steps: (1) adding water into a mixed metal salt and dissolving to obtain a coagulant solution; (2) regulating the pH of the piggery wastewater to alkalinity to obtain piggery wastewater I; (3) adding biochar into the piggery wastewater I obtained in the step (2), and stirring to obtain piggery wastewater II; (4) adding the coagulant solution obtained in the step (1) into the piggery wastewater II obtained in the step (3), stirring, standing, and performing solid-liquid separation, wherein the upper layer is the treated piggery wastewater III, and the lower layer is coagulated sludge. The method provided by the invention realizes a good advanced treatment effect on the piggery wastewater and can effectively remove phosphorous and COD; meanwhile, the recycled coagulated sludge can serve as a potassium-phosphorous organic compound fertilizer, and resource utilization is realized; moreover, the process is simple and stable, the production cost is low, and large-scale application is easy to realize.
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Description

technical field

[0001] The invention belongs to the field of waste water resource utilization, and in particular relates to a pig farm waste water advanced treatment and resource recycling method. Background technique

[0002] Pig farm wastewater has complex components, high nitrogen and phosphorus concentrations, difficult treatment, and high cost. Incomplete treatment can lead to a series of serious environmental problems. The Ministry of Environmental Protection of the People's Republic of China has implemented a second consultation on the discharge standard of livestock and poultry breeding wastewater (Huan Ban Han

[2014] No. L was raised to 5.0mg / L and 150mg / L respectively. In the original conventional treatment process, it was difficult for biochemical / ecological treatment to achieve TP 5.0mg / L and COD150mg / L effluent. Taking a pig farm in Huizhou as an example, the previous research experience found that most of the toxic and harmful substances such as heavy metals a...

Claims

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