改良型A2/O工艺的脱氮诊断分析  

Diagnosis Analysis on Nitrogen Removal by Modified A^2/O Process

作　　者：陈亚松[1] 颜孜佳 文嘉[1] 许斌 苏大雄 胡洪营[3] 

机构地区：[1]北京建工环境发展有限责任公司,北京100192 [2]昆山市北区污水处理厂,江苏昆山215300 [3]清华大学环境科学与工程系,北京100084

出　　处：《中国给水排水》2010年第18期23-27,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(2008ZX07313-002)

摘　　要：随着污水排放标准不断提高,基于污水厂现状的A2/O工艺的脱氮诊断和优化,是解决脱氮问题最为经济也是优先采取的方案。以昆山市北区污水厂为例,对改良型A2/O工艺的脱氮抑制问题进行了系统识别、诊断分析。研究表明,系统的硝化效果较好,出水NH3-N均值为1.2 mg/L;针对反硝化不足,提出了碳源、回流比对反硝化脱氮的抑制,当R=200%时,TN的平均去除率提高至73.7%;前置反硝化是去除TN的重要途径,必须权衡与缺氧区脱氮的关系以保证出水TN值达标。With the upgrading of wastewater discharge standard, the diagnosis and optimization of nitrogen removal by A2/O process based the current situation of WWTP are the most economic and preferential method to solve nitrogen removal problem. Taking Beiqu WWTP in Kunshan as example, the sys- tem identification and diagnosis analysis on inhibition of nitrogen removal by modified A2/O process were performed. The study shows that the nitrification efficiency is good, and the effluent NH3 -N is 1.2 mg/L. Carbon source and recycle ratio are the key factors affecting denitrification. When the recycle ratio is 200% , the average removal rate of TN is increased to 73.7%. As an important way for TN removal in pre-denitrification, the relationship between anoxic denitrification and pre-denitrification should be balanced in order to meet TN discharge standard.

关 键 词：A2/O工艺 工艺诊断 脱氮 优化调控 北区污水厂 

分 类 号：X703.1[环境科学与工程—环境工程]