UASB-two-stage A/O-coagulation treatment piggery methane slurry system

Abstract

The invention discloses a UASB-two-stage A / O-coagulation treatment piggery methane slurry system. The system comprises a regulating reservoir, a UASB reactor, a primary anoxia tank, a primary aerobiotic tank, a secondary anoxia tank, a secondary aerobiotic tank, a mid-sedimentation tank, a coagulating tank, a secondary sedimentation tank, a disinfection tank and a standard discharge outlet which are connected in sequence. The UASB reactor, a sludge thickening tank and a plate-and-frame filter press are sequentially connected; the mid-sedimentation tank, the secondary sedimentation tank, the coagulating tank and the sludge thickening tank are connected, sot that sludge in the three tanks is discharged into the slurry thickening tank. The system is obvious in nitrogen and phosphorus removal effect, stable in treatment effect, high in impact load resistance, easy to operate and low in operating cost, and all indexes of outflow water obtained after piggery methane slurry is treated through the combination technology meet the requirement the discharge standard of pollutants for livestock and poultry breeding (GB 18596-2001).

Description

technical field [0001] The invention relates to an improved upflow anaerobic sludge bed reactor (UASB), a two-stage anoxic / aerobic (two-stage A / O) and coagulation comprehensive treatment pig farm biogas slurry system, and belongs to the technical field of environmental protection water treatment. Background technique [0002] In recent years, my country's large-scale livestock and poultry breeding industry has developed rapidly, which has caused serious environmental pollution while increasing income and improving people's living standards. Discharge pollution from livestock and poultry breeding industry has become one of the main factors of rural non-point source pollution in my country, and also the third largest pollution source after industrial wastewater and domestic sewage. Statistics show that in 2010, the chemical oxygen demand (COD) discharged by the national livestock and poultry breeding industry has reached 12.6826 million tons, of which the high-concentration wa...

AI Technical Summary

Problems solved by technology

Biogas slurry from pig farms is still organic wastewater with high ammonia nitrogen, direct aerobic treatment, excessive energy consumption and high operating costs

The appropriate solution should be an anaerobic and then aerobic combined treatment process, but at this stage there is still a lack of economical, reasonable and technologically mature combined processes to treat this type of wastewater

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