气升式氧化沟型MBR对城镇污水的脱氮除磷效果  

Pilot-scale Airlift Oxidation Ditch Membrane Bioreactor for Nitrogen and Phosphorus Removal from Municipal Wastewater

作　　者：张宏扬 夏俊林[1] 孙剑宇[1] 严晓旭[1] 黄霞[1] 施汉昌[1] 储栋 杭俊良 

机构地区：[1]清华大学环境学院环境模拟与污染控制国家重点联合实验室,北京100084 [2]江苏一环集团有限公司,江苏无锡214261

出　　处：《中国给水排水》2015年第11期14-18,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2011ZX07301-002);博士点基金资助项目(20110002130009);教育部长江学者和创新团队发展计划项目(IRT1152)

摘　　要：依托太湖流域某城镇污水处理厂,研究了气升式氧化沟型MBR中试装置在不同运行条件下对污染物的去除效能。结果表明,当水力停留时间分别为9、6.75和5.4 h时,出水COD、氨氮和总氮浓度均能达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)中一级A标准,出水总磷浓度可达到二级标准。通过对不同曝气量和曝气方式的优化试验得知,在底部小孔曝气方式时曝气量最低,为48 m3/h,此时的气水比为6∶1。Wastewater treatment performance of a pilot-scale airlift oxidation ditch membrane bio- reactor （AODMBR） was studied in a wastewater treatment plant located in Taihu Lake Basin. Pollutants removal efficiency of the reactor under different operating conditions was investigated. The concentrations of COD, NH4 - N and TN in the effluent all could meet the first grade A of Discharge Standard of Pollu- tants for Municipal Wastewater Treatment Plant （GB 18918 -2002） when hydraulic retention time （HRT） was 9 h, 6.75 h and 5.4 h respectively. The effluent TP concentration could reach the seconda- ry grade standard. The optimized aeration mode for the pilot-scale AODMBR was small bubble aeration with an aeration demand of 48 m3/h, meanwhile the gas-water ratio was 6 ： 1.

关 键 词：气升式氧化沟 MBR 脱氮除磷 城镇污水 

分 类 号：X703[环境科学与工程—环境工程]