A2O-BAF工艺反硝化聚磷效果的影响因素

为了提高系统的反硝化除磷脱氮效率,采用静态试验考察了厌氧反应时间和厌氧段COD对A2O-BAF工艺反硝化聚磷效果的影响,同时对缺氧阶段反硝化聚磷量与脱氮量之间的关系进行了探讨.试验结果发现,在试验范围内,随着厌氧反应时间和厌氧段COD的增加,厌氧释磷量均增加,反硝化聚磷量,净聚磷量和硝氮去除量亦都随之增加,但是反硝化聚磷量与释磷量的比值基本维持不变.在2组8个不同的试验条件下,缺氧段反硝化聚磷量和脱氮量之间均呈现出良好的线性关系,系数为1.007~1.053,R2为0.992~0.997,反映了A2O-BAF系统中污泥的固有特性.

Factors influencing the denitrifying phosphorus removal efficiency of A2O-BAF process

The effects of anaerobic reaction time and COD concentration on denitrifying phosphorus removal efficiency of A2O-BAF process were studied in parallel batch experiments, at the same time the relationship between denitrifying phosphorus uptake amount and nitrate consumption was investigated in anoxic condition. The results found that as anaerobic reaction time from 30min to 120min and COD concentration from 50mg/L to 200mg/L increased, phosphorus release amount, denitrifying phosphorus uptake amount, net phosphorus uptake amount and nitrate removal amount increased, but the ratio of denitrifying phosphorus uptake amount and release amount remained almost unchanged. In the all tests, a good linear relationship between denitrifying phosphorus uptake amount and nitrate consumption was presented in anoxic condition, with the linear coefficient and correlation coefficient ranging from 1.007 to 1.053 and 0.992 to 0.997 respectively, which showed the sludge intrinsic characteristics in the anaerobic/anoxic/aerobic process with biological aerated filter (A2O-BAF) denitrifying phosphorus removal system.