Livestock breeding waste water treatment method

Abstract

The invention discloses a livestock breeding waste water treatment method. The method comprises the steps that a waste water treatment system comprising a methane tank, a solid-liquid separator, a regulating tank, a sand filter tank, a granule bacterium algae reaction tank and a sedimentation tank is built; in the granule bacterium algae reaction tank, under the condition suitable for culture, an IC internal circulation vortex flow is formed in the bacteria and algae reaction tank by changing the hydraulic condition, the action of the vortex flow enable microalgae and activated sludge to be mutually wrapped together, and bacteria and algae granule micelle which takes sludge as the core and is wrapped by the microalgae is formed finally. The granule bacterium algae system can greatly increase the biomass of the algae reaction tank, and the livestock breeding waste water treatment efficiency is improved; meanwhile, good settling performance is achieved, the advantages of rapid algae-water separation and the like can be achieved through an ordinary gravity sedimentation tank, and a good treatment effect on treating livestock breeding waste water which is high in nitrogen and phosphorus content is achieved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating livestock and poultry breeding wastewater with a granular bacteria and algae system as the core. Background technique [0002] In the national standard released in 2014, the discharge standard of livestock and poultry breeding wastewater will be more stringent. At present, the treatment of livestock and poultry wastewater is mainly based on biological methods, including anaerobic and aerobic treatment. [0003] Although the traditional SBR process, contact oxidation method and oxidation ditch process can better remove COD, SS, etc. in livestock and poultry wastewater, the removal effect on nitrogen and phosphorus is poor. [0004] Effect of anaerobic-aerobic-constructed wetland combined process on COD and BOD of livestock and poultry breeding wastewater 5 And SS treatment effect is very good, but it has the disadvantages of low nitrogen and phosphorus remov...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of low wastewater treatment efficiency, complex process, low treatment efficiency, high cost, and difficult separation of algal water in the prior art.

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