A/A/O工艺脱氮除磷运行效果分析  

Analysis on running effect for biological nitrogen and phosphorus removal of A/A/O technology

作　　者：李曈[1] 郝瑞霞[1] 刘峰[1] 刘京[1] 

机构地区：[1]北京工业大学建工学院,北京100124

出　　处：《环境工程学报》2011年第8期1729-1734,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50778004);北京市自然科学基金项目(8082006);国家水体污染控制与治理科技重大专项(2009ZX07104-006)

摘　　要：为提高城市污水处理厂科学运行管理水平和出水质量,通过对某污水处理厂污水处理工艺的沿程采样分析,对比分析了A/A/O工艺脱氮除磷效果与工艺运行控制参数之间的相关关系。结果表明,A/A/O工艺对总氮去除率为83.2%,出水中氮的形态主要为硝酸盐氮;出水中总磷浓度基本达到一级A标准,总磷去除率在86.3%以上;缺氧段具有明显的反硝化聚磷作用;脱氮除磷效果与污泥负荷有反向变化关系,泥龄对磷的去除效果影响明显,当污泥负荷控制在0.15kg BOD5/(kg MLVSS.d)左右,泥龄控制在10～12 d时,可以同时获得较好的脱氮与除磷效果。污水处理系统内部磷的积累与排泥量具有显著的反向相关关系,排泥量控制在进水量的2%～2.5%时,可以保持系统稳定除磷状态,同时可避免过量排泥造成的经济浪费。In order to improve the scientific management level and effluent quality of a municipal wastewater treatment plant（WWTP）,the relationship between nitrogen and phosphorus removal effect and operating parameters of the A/A/O technology was studied by sampling and analyzing along the process in WWTP of Beijing.The results showed that the total nitrogen removal rate was 83.2%,and the main form of nitrogen was nitrate nitrogen in effluent.The TP concentration in effluent could reach the 1 grade A level of national discharging standard in China basically,and the TP removal rate was over 86.3%.The denitrifying phosphorus removal played a remarkable role in the anoxic phase of A/A/O process.The relationship between nitrogen and phosphorus removal effect and sludge loading expressed inverse variation.Sludge retain time（SRT） had an obvious impact on phosphorus removal.When the sludge loading was about 0.15 kg BOD5/（kg MLVSS·d）and the SRT was about 10~12 d in A/A/O process,nitrogen and phosphorus removal rates were up to 81% and 88%,respectively.There was an inverse variation relationship between the phosphorus accumulation and the sludge emission capacities in the wastewater treatment system.When the sludge emission capacities maintained about 2~2.5 percent of influent,phosphorus removal can be controlled in the stable and economic status.

关 键 词：A/A/O工艺 脱氮除磷 磷积累 运行参数 

分 类 号：X703[环境科学与工程—环境工程]