Livestock and poultry wastewater is a majpor source of non-pont pollution in rural areas, a large amount of livestock and poultryexcrement sewage cumulative, in the surrounding areas of major cities formed a huge source of pollution. Pig wastewater is themain body of pollution discharge. In view of the pig farm biogas liquid rich in ntrogen; phosphorus, organic matter and nutrientratio serious mbalance, carbon to nitrogen ratio is very low water qually charactenistics. High-efic ent bioreactor treatmenttechnology is the fundamentalway to achieve in-situ pllution control.
Batch batch boreactor with intermitent. aeration can effectively realize the accumulation of ntrte nitrogen and realize stabledenitrification and denitrification by alternating the anoxic environment and aerobic envronment in a single operating cycle,Thus, 40% oxygen consumption was saved in nitrification stage, 25% organic carbon consumption was saved in denitrificationstage, sludge production was greatly reduced, and denitr fcation reaction rale was greatly increased. At the same time, underthe operation mode of intermttent aeration, the akalinity proouced in anoxic dentrfication process can replenish the alkalinityconsumed in aerobic nitrification process and save the consumption of alkali regulating agents.