A/O生物接触氧化反应器的挂膜与启动  

Biofilm Formation and Start-up of A/O Biological Contact Oxidation Reactor

作　　者：崔鹏[1] 彭永臻[2] 曾立云[1] 张永辉[1] 马娟[1] 陈永志[1] 

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《中国给水排水》2016年第9期25-29,共5页China Water & Wastewater

基　　金：甘肃省财政厅基本科研业务费资助项目(213065);国家自然科学基金资助项目(51168027)

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、NH_4^+-N、PO_4^(3-)-P和NO_3^--N的去除性能。在平均进水COD、NH_4^+-N、PO_4^(3-)-P和NO_3^--N浓度分别为179、45.8、3.61和0.93 mg/L,水温为22~25℃,DO为2~3 mg/L的条件下,采用连续流人工接种挂膜,22 d后生物膜成熟。第6天,HRT为12 h时,对COD、NH_4^+-N和PO_4^(3-)-P的去除率分别为64.29%、38.38%和18.25%,出水NO_3^--N为16.21 mg/L;第15天时HRT为9 h,开始排泥使SRT保持在30 d,对COD、NH_4^+-N和PO_4^(3-)-P的去除率分别为78.51%、67.71%和36.49%,出水NO_3^--N为17.67 mg/L,填料表面附着一层黄褐色的生物膜;第22天时HRT降至6 h,达到设计值,SRT为10 d,对COD、NH_4^+-N和PO_4^(3-)-P的去除率分别为86.84%、78.20%和73.79%,出水NO_3^--N浓度为10.79 mg/L,生物膜增厚呈深褐色,表明系统启动成功。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.

关 键 词：A/O生物接触氧化反应器 人工接种 挂膜 生活污水 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]