废水回用工艺中曝气生物滤池的特性研究

以页岩陶粒为滤料,对曝气生物滤池的运行性能进行了研究。通过考察水力负荷对COD、氨氮去除效果的影响试验,容积负荷对COD去除效果试验,BAF对浊度的去除效果、抗冲击能力试验;结果显示:COD最佳水力负荷为7.0m3/h,NH4+-N最佳水力负荷为5.0m3/h,COD最佳容积负荷为5.89kg/(m3.d);进水浊度平均为12.7NTU,出水浊度平均为3.5NTU时,平均去除率为72.4%。水力冲击负荷对硝化菌的影响较小,而对异养菌影响较大。

Study on Characteristics of Biological Aerated Filter in Waste Water Reuse Process

The characteristics of BAF running in waste water reuse were studied. Tests were done including COD and NH4+-N removal by hydraulic load,COD removal by volume load,turbidity reduction and by BAF and resistance of hydraulic impact. The results showed that the best hydraulic load of COD was 7.0 m3/h; the best hydraulic load of NH4+-N was 5.0m3/h; the best volume load was 5.89 kg/(m3·d); the average turbidity removal rate of BAF was 72.4% with the average influent turbidity 12.7 NTU and the average effluent turbidity 3.5 NTU. Hydraulic impact load had little effects on autotrophic bacteria,but great effects on heterotrophic bacteria.