Case Study on Typical Efficient Up-to-standard Discharge of Pig Breeding Sewage
This paper reported a case of pig farm in Huangshan City adopted the process of"pretreatment-two-stage A/O-advanced oxidation-disinfection"to treat the pig breeding wastewater with low C/N ratio.Since it was put into operation,the process has been running stably,and the effluent quality has been implemented according to the"Farmland irrigation Water Quality Standard"(GB5084-2005)in seasonal busy season and the"Comprehensive sewage discharge Standard"(GB8978-1996)in non-busy season.Two-stage A/O efficient biochemical process,differentiated functional regulation technology adopts low-dissolved oxygen operation control strategy,which effectively reduces the operation and treatment cost of the project while ensuring the effluent quality,among which the implementation of the"Comprehensive sewage discharge Standard"(GB8978-1996)is about 11.48 yuan·t-1.The biochemical process can be used as a reference for low C/N ratio sewage projects in farms.
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