中文摘要：

采用生活污水，研究了A／O生物接触氧化反应器的挂膜启动及对COD、NH4^＋-N、PO4^3-P和NO3^-N的去除性能。在平均进水COD、NH4^＋-N、PO4^3-P和NO3^--N浓度分别为179、45．8、3．61和0．93mg／L，水温为22—25℃，DO为2～3mg／L的条件下，采用连续流人工接种挂膜，22d后生物膜成熟。第6天，HRT为12h时，对COD、NH4^＋-N和PO4^3--P的去除率分别为64．29％、38．38％和18．25％，出水NO3^--N为16．21mg／L；第15天时HRT为9h，开始排泥使SRT保持在30d，对COD、NH4^＋-N和PO4^3--P的去除率分别为78．51％、67．71％和36．49％，出水NO3^-N为17．67mg／L，填料表面附着一层黄褐色的生物膜；第22天时HRT降至6h，达到设计值，SRT为10d，对COD、NH4^＋-N和PO4^3--P的去除率分别为86．84％、78．20％和73．79％，出水NO3^--N浓度为10．79mg／L，生物膜增厚呈深褐色，表明系统启动成功。

英文摘要：

The removal performance of COD, NH4^＋ - N, PO4^3- - P and NO3^- - N during the biofilm formation and start-up in a continuous flow A/O biological contact oxidation reactor was investigated using real domestic sewage. When the average influent concentrations of COD, NH4 - N, PO4^3- - P and NO3^- - N were 179 mg/L, 45.8 mg/L, 3.61 mg/L and 0.93 mg/L respectively, the water temperature was about 22 to 25 ℃, the DO was maintained at around 2 to 3 mg/L, the biofilm was formed within 22 d by using continuous flow artificial inoculation. At the HRT of 12 h, the removal rates of COD, NH4^＋ -N and PO4^3- - P were 64.29% , 38.38% and 18.25% respectively and the concentration of NO3^- -N in the effluent was 16.21 mg/L on the sixth day. At the HRT of 9 h and SRT of 30 d, the removal rates of COD, NH4^＋ - N and PO4^3- - P were 78.51%, 67.71% and 36.49% respectively, the concentration of NO3^ - N in the effluent was 17.67 mg/L, and a layer of brown biofilm was developed on bio-filler on the 15th day. At the I-IRT of 6 h and SRT of 10 d, the removal rates of COD, NH4^＋ -N and PO43^- - P were 86.84%, 78.20% and 73.79% respectively, the concentration of NO3^- - N in the effluent was 10.79 mg/L, and the dark brown biofilm became thicken on the 22nd day, which indicated the successful start-up of the system.