摘要
采用两段曝气生物滤池处理生活污水进行了试验研究，探讨了不同的水力停留时间（HRT）对处理效果的影响。结果表明：HRT为1-4h时，进水COD质量浓度98～154．2mg／L的条件下，COD的去除率平均为74．1％，SS的去除率平均为84．5％，NH3-N去除率平均为55．4％，出水COD降至18．6-50．4mg／L，SS降至4．8-14mg／L，NH3-N降至1．7-28．4mg／L；发现NH3-N随着HRT变化较大，COD和TSS变化不显著。同时对第二段生物滤池内生物相特征进行了深入研究，并试验出该系统处理生活污水各段最佳的反冲洗周期。
On treatment of domestic wastewater by two-stage aerated biological filter and the effect of pollutants removal on the different hydraulics retention time（HRT） ,the results show that HRT is 4 -10 h, the COD average removal rate is 74.1%, TSS average removal rate is 84.5% and NH3-N average removal rate is 55.4%. The COD,TSS and NH3-N effluent are decreased by 18.6-50.4 mg/L,4.8-14 mg/L and 1.7-28.4 mg/L. Specially NH3-N removal rate is obviously as the HRT is decreased, but the COD and TSS removal rate is non-significant. Moreover, the biological phase in the second biofilter is studied further and obtained some novel theories. The best backwash time is determined of two stages filter too.
出处
《科学技术与工程》
2008年第13期3563-3566,共4页
Science Technology and Engineering
关键词
生活污水
生物滤池
硝化作用
生物膜法
生物相
反冲洗
domestic wastewater
biofiher
nitrification function
biofilm
biological phase
backwash
