两种污水处理工艺反硝化聚磷比较研究

Comparison of Denitrifying Phosphorus Removal Performance in Two Sewage Treatment Technologies

为了确定不同工艺反硝化聚磷性能及差异,对采用不同工艺的2个污水处理厂的活性污泥进行厌氧释磷、好氧聚磷和反硝化聚磷试验研究,2个污水处理厂分别采用CAST和A/O工艺。结果表明:CAST工艺中好氧聚磷和反硝化聚磷效率分别为3.34mgP/h和2.23mgP/h,A/O工艺中好氧聚磷和反硝化聚磷效率为2.54mgP/h和0.83mgP/h,CAST和A/O工艺的反硝化聚磷菌和好氧聚磷菌比率(DPB/PAO)分别为66.8%和24.9%,CAST工艺反硝化聚磷能力优于A/O工艺。

An experimental study on anaerobic phosphorus release,aerobic phosphorus uptake and denitrifying phosphorus removal by activated sludge from three municipal wastewater treatment plants using different processes was carried out to determine the denitrifying phosphorus removal ability and compare the performances.The processes included the Carrousel system with anoxic-oxic stage(A/O)and the cyclic activated sludge technology(CAST).The results show that the efficiency of aerobic and denitrifying phosphorus accumulation in CAST process is 3.34 mgP/h and 2.23 mgP/h,respectively.The efficiency of aerobic and denitrifying phosphorus accumulation in A/O process is 2.54 mgP/h and 0.83 mgP/h.The proportion of denitrifying phosphorus accumulating bacteria and aerobic phosphorus accumulating bacteria in CAST and A/O processes were 66.8%and 24.9%,respectively.The denitrifying phosphorus accumulating capacity of CAST process was better than that of A/O process.