CUITao,LISheng,TIANMin,et al.Evaluation of Nitrogen and Phosphorus Removal Performance in an Oxidation Ditch Based A2/O Process[J].China Water & Wastewater,2022,38(7):75-79.
氧化沟型A2/O工艺脱氮除磷性能评价
- Title:
- Evaluation of Nitrogen and Phosphorus Removal Performance in an Oxidation Ditch Based A2/O Process
- 关键词:
- 氧化沟型A2/O工艺; 脱氮除磷; 硝化菌; 聚磷菌
- Keywords:
- oxidation ditch based A2/O process; nitrogen and phosphorus removal; nitrifying bacteria; phosphorus accumulating organisms (PAO)
- 摘要:
- 通过测定沿程氮磷去除效果、污泥的硝化活性以及聚磷和释磷活性，并利用荧光原位杂交技术分析了西安市某城市污水处理厂氧化沟型A2/O工艺和典型A2/O工艺的脱氮除磷性能。结果表明，氧化沟型A2/O工艺中污泥的硝化活性较高，好氧池存在显著的同步硝化反硝化现象，具有更高的脱氮性能；污泥中聚磷菌的含量、活性和除磷能力与典型A2/O工艺相近，其作为一种新型的城市污水脱氮除磷工艺具有推广应用价值。
- Abstract:
- The removal of nitrogen and phosphorus along the process, the activity of nitrification, phosphorus accumulation and phosphorus release of sludge in an oxidation ditch based A2/O process and a typical A2/O process in a municipal wastewater treatment plant in Xi’an were measured, and the performances of the two processes for nitrogen and phosphorus removal were compared by fluorescence in situ hybridization（FISH）. In the oxidation ditch based A2/O process, the nitrification activity of sludge was higher, and significant simultaneous nitrification and denitrification took place in the aerobic tank, indicating that higher nitrogen removal performance was obtained. The abundance, activity and phosphorus removal capacity of phosphorus accumulating organisms（PAO） in sludge from the oxidation ditch based A2/O process were similar to those from the typical A2/O process. As a new municipal wastewater denitrification and phosphorus removal process, oxidation ditch based A2/O process has the value for extension and application.
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