改进型A^2/O工艺处理城市生活污水的脱氮除磷效能研究  

Research on phosphorus and nitrogen removal efficiency of modified A^2/O process in municipal sewage treatment

作　　者：张卉[1] 李伟光[1,2] 田文德 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [2]城市水资源开发利用(北方)国家工程研究中心,黑龙江哈尔滨150090

出　　处：《环境污染与防治》2012年第3期26-29,共4页Environmental Pollution & Control

基　　金：国家水体污染控制与治理重大专项(No.2009ZX07317-008-01)

摘　　要：在分析传统A2/O工艺缺陷的基础上,提出了一种改进型A2/O工艺。为了防止回流污泥中的硝酸盐进入厌氧区,在传统A2/O工艺的厌氧区后面增加一个体积较小的缺氧选择池,回流污泥进入缺氧选择池,并进行反硝化消耗回流污泥中的硝酸盐;同时,在缺氧区通过反硝化除磷实现"一碳两用"。结果表明,改进型A2/O工艺有较好的脱氮除磷效果,在COD为298mg/L、TN为55mg/L左右、TP为7mg/L左右时,系统对COD、TN、TP的平均去除率分别为88.44%、77%、95%。A modified A^2/O process was designed base on analyzing the defects of traditional A^2/O process. In order to prevent the nitrate in the returned sludge flows into the anaerobic zone, a small selector zone was added be- hind the anaerobic zone of traditional A^2/O process to accept the returned sludge. The nitrate in the returned sludge was consumed in selector zone through denitrification so as to decrease the nitrate quantity in anaerobic zone. In the anoxic zone, the organic carbon substrate can be used simultaneously for both nitrogen and phosphorus removal through the denitrifying dephosphatation. The experimental result showed that the modified A^2/O process presented favorable effect on simultaneous nitrogen and phosphorus removal. Under the condition of influent COD 298 rag/L, TN 55 mg/L and TP 7 nag/L, the removal rates of COD, TN and TP were 88.44%, 77% and 95%, respectively.

关 键 词：改进型A2/O工艺 反硝化除磷 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]