A^2O-BAF中试系统处理城镇污水的脱氮除磷性能  

Nitrogen and Phosphorus Removal Performance of Pilot-scale A^2O- BAF System in Treating Municipal Wastewater

作　　者：黎京士[1] 刘钢[1] 谌建宇[1] 黄荣新[1] 骆其金[1] 何晨晖 李鑫华[1] 

机构地区：[1]环境保护部华南环境科学研究所广东省水与大气污染防治重点实验室,广东广州510655

出　　处：《中国给水排水》2014年第21期6-9,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07206-002);中央级公益性科研院所基本科研业务专项(zx021-201211-121);粤港关键领域重点突破项目(2009A030902002)

摘　　要：针对目前城镇污水处理厂升级改造的技术需求,研发了"厌氧/缺氧/短时好氧—曝气生物滤池(A2O-BAF)"工艺,并建立一套20 m3/d的中试系统。A2O段的HRT为4.0 h,厌氧、缺氧、好氧体积比为1∶2∶1;BAF的HRT为1.2 h,硝化液回流比为100%。研究表明,在进水COD、NH3-N、TN、TP、SS分别为249、28.77、40.37、1.04、108 mg/L条件下,出水值分别为28.44、2.63、9.51、0.42及9.21 mg/L,出水水质达到城镇污水处理厂一级A排放标准。同时,该工艺还具有占地面积小、运行成本低、污泥产率低等特点,是一种有较好应用前景的污水处理组合工艺。An anaerobic/anoxic/short-time aerobic process coupled with biological aerated filter （ A2O - BAF） was developed, and a pilot-scale 20 m3/d system was set up to meet the technical require- ment of upgrading and retrofitting for municipal wastewater treatment. The HRT of the A2O reactor was 4 h with the anaerobic/anoxic/aerobic volume ratio of 1 ： 2 ： 1, and the HRT of the BAF was 1.2 h with nitrification liquid reflux ratio of 100%. The average concentrations of COD, ammonium nitrogen, total nitrogen, total phosphorus and suspended solids were reduced from 249 mg/L, 28.77 mg/L, 40.37 rag/ L, 1.04 mg/L and 108 mg/L to 28.44 mg/L, 2.63 mg/L, 9.51 rag/L, 0.42 mg/L and 9.21 rag/L, respectively. The effluent quality could meet the national discharge standard （the first class-A） for mu- nicipal wastewater treatment plant. The combined process has the advantages of small footprint, low operation cost and low excess sludge, and its application prospect is wide.

关 键 词：反硝化除磷 曝气生物滤池 脱氮除磷 城镇污水 

分 类 号：X703[环境科学与工程—环境工程]