Study on Treatment of Piggery Wastewater With Upflow Anaerobic Sludge Blanket(UASB) and Sequencing Batch Reactor(SBR)

According to the piggery wastewater characteristerics, the UASB and SBR system were introduced into the experiment in order to improve the wastewater treatment efficiency. In the UASB experiments, the removal of COD, BOD, and NH⁺₄-N was studied in three scales of VLR (Volume Loading Rate), COD 2, 5, and 8 kg/(m³·d). The results indicated that the removal rates of COD were 50%～70% in the UASB reactor, and the running of UASB reactor was stable. In the SBR's experiment, the removal effect of NH⁺₄-N was very obvious, when the effluent of UASB was introduced into the SBR equipment. The removal rate of NH⁺₄-N was 80%～95%.