厌氧释磷量和温度对反硝化聚磷的影响

Effects of phosphorus release amount and temperature on denitrifying phosphorus removal in a two-sludge system

为了提高双污泥系统的脱氮除磷效率,以反硝化除磷污泥为研究对象,采用静态试验进行对比研究,考察了厌氧释磷量和温度对缺氧反硝化聚磷的影响。结果表明：在试验范围内,随着厌氧释磷量的增加,反硝化聚磷量、净聚磷量和硝氮去除效率增加,聚磷量与释磷量之比基本不变。在8、16、28℃三种情况下,均在约260min时结束反硝化聚磷,低温下反硝化聚磷效果显著下降。在各试验条件下,NO3^--N去除量与PO4^3--P去除量均呈良好的线性关系,系数为1.002-1.044,体现了系统中污泥的固有特性。

To improve the efficiency of denitrifying phosphorus removal in the two-sludge process, the effects of phosphorus release amount and temperature on denitrifying phosphorus removal were investigated in parallel batch experiments. The results indicated that as phosphorus release amount increased from 8.64 mg · L^- 1 to 28.93 mg · L^-1, phosphorus uptake amount, net phosphorus uptake amount and nitrate removal efficiency increased, but the ratio of uptake amount and release amount remained almost unchanged. At the temperatures of 8℃, 16℃, 28℃, denitrifying phosphorus removal all ended after approximately 260 min reaction. Nitrate and phosphorus removal efficiency decreased at lower temperatures. A good linear relationship between nitrate consumption and phosphorus uptake amount was observed in the experiments with the correlation coefficient ranging from 1. 002 to 1. 044. This relationship between nitrate consumption and phosphorus uptake amount indicated the sludge intrinsic characteristics.