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Method for removing high ammonia nitrogen from pig farm dry manure cleaning livestock wastewater

A technology for aquaculture wastewater and dry cleaning of manure, which is applied in chemical instruments and methods, animal husbandry wastewater treatment, multi-stage water treatment, etc. Low and ensure the effect of up-to-standard emission

Inactive Publication Date: 2016-04-06
GUANGDONG SHUIQING ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

The mechanism of ammonia removal by breakpoint chlorination is that chlorine gas reacts with ammonia to generate harmless nitrogen gas. Its disadvantages are: large amount of chlorine addition and high cost

Method used

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  • Method for removing high ammonia nitrogen from pig farm dry manure cleaning livestock wastewater

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Embodiment

[0023] like figure 1 Shown, a kind of removal method of high ammoniacal nitrogen in the waste water of pig farm dry cleaning manure breeding, it comprises the steps:

[0024] In step (1), the pig-raising wastewater discharged from the pig house first passes through mechanical grilles to remove large particles, and then flows into the sump. Driven by the lift pump, it enters the solid-liquid separator for solid-liquid separation, and most of the wastewater is separated. Suspended matter such as small particles of dung and slag to remove part of the ammonia nitrogen and obtain waste water after slag separation.

[0025] In step (2), the waste water after slag separation enters the biogas digester for anaerobic fermentation, then enters the adjustment pond, and then enters the primary anoxic pond, where it is mixed with the mixed solution from the primary aerobic pond for denitrification. Then, the effluent from the first-level anoxic tank enters the first-level aerobic tank, an...

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Abstract

The invention provides a method for removing high ammonia nitrogen from pig farm dry manure cleaning livestock wastewater. The method comprises the following steps: firstly, physically separating ammonia nitrogen from livestock wastewater through a mechanical grid and a solid-liquid separator to obtain residue-isolated wastewater; performing anaerobic fermentation, and performing two-stage hypoxic-aerobic biochemical treatment in order that the nitrogen removal efficiency can be up to 90-95 percent; lastly, arranging a breakpoint chlorination pond at the water outlet of a secondary biological sedimentation pond, and adding a sodium hypochlorite solution once an ammonia nitrogen value exceeds a design value in order to ensure complete removal of the ammonia nitrogen from the wastewater. The method has the advantages of stability, reliability, high automation degree, low running cost, low labor intensity and high impact load resistance, and is worthy of popularization and application. By adopting the method, discharge of the ammonia nitrogen up to standards can be ensured continuously and stably for a long time.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a technology for removing high-ammonia nitrogen in pig farm dry-cleaning manure breeding wastewater. Background technique [0002] With the continuous development of the economy and the improvement of living standards, the pig breeding industry is also developing continuously. The treatment of feces, urine and other excreta produced during the breeding process and the wastewater from flushing pig houses has been paid more and more attention. The wastewater produced by pig breeding is A waste water with high COD, high BOD, high ammonia nitrogen, and high SS has good biochemical properties. Direct discharge of this waste water will cause serious environmental pollution. At the same time, ammonia nitrogen in sewage is one of the important factors causing water eutrophication. [0003] The concentration of ammonia nitrogen in pig farm dry cleaning wastewater is very high, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/20
CPCC02F9/00C02F1/00C02F3/302C02F2103/20C02F2301/08
Inventor 罗小龙林国宁张建华赖日坤何耀武梁康祜
Owner GUANGDONG SHUIQING ENVIRONMENTAL PROTECTION TECH CO LTD
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