AAO工艺脱氮除磷运行效果

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Analysis on running effect for biological nitrogen and phosphorus removal of A / A / O technology
Li Tong Hao Ruixia Liu Feng Liu Jing
( College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124 , China)
Abstract In order to improve the scientific management level and effluent quality of a municipal the relationship between nitrogen and phosphorus removal effect and operwastewater treatment plant ( WWTP) , ating parameters of the A / A / O technology was studied by sampling and analyzing along the process in WWTP of and the main form of nitrogen was Beijing. The results showed that the total nitrogen removal rate was 83. 2% , 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. Key words A / A / O process; biological nitrogen and phosphorus removal; phosphorus accumulation; operational parameter 随着污水资源化利用率的提高和城市河湖富营 养化问题的加重, 对城市污水厂处理出水中氮、 磷指 标要求更为严格, 特别是出水用于河湖补水或作为 再生水厂水源的污水处理厂, 其运行管理水平和氮 磷去除效果对当地污水资源化利用和水环境保护有 显著影响。如何在现有工艺基础上, 通过科学的运 行管理, 最大程度地发挥工艺的处理效能, 降低能 , , 耗 提高出水质量 是污水厂日常运行管理中所面临 的新挑战。 厌氧缺氧好氧( A / A / O) 工艺作为结构上最为 简单的同步脱氮除磷污水处理工艺, 是目前城市污
第5 卷 第8 期 2 0 1 1 年 ห้องสมุดไป่ตู้ 月
环境工程学报
Chinese Journal of Environmental Engineering
Vol . 5 , No . 8 Aug. 2 0 1 1
A / A / O 工艺脱氮除磷运行效果分析
李 曈 郝瑞霞
*




( 北京工业大学建工学院 , 北京 100124 ) 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 , A / A / O A / A / O 工艺对总氮去除率为 对比分析了 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, 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. 15 kg 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 。 关键词 A / A / O 工艺 脱氮除磷 磷积累 运行参数 中图分类号 X703 文献标识码 A 9108 ( 2011 ) 08172906 文章编号 1673-
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