摘要随着我国对城镇污水处理厂氮磷排放标准的要求越来越严格，脱氮除磷工艺日益受到广泛关注，因此对高效脱氮除磷工艺的开发显得必要而紧迫。而反硝化除磷技术在污水脱氮除磷工艺中有着广泛应用。它具有节省有机碳源、减少温室气体排放、剩余污泥产量小等优点，是一种具有广阔发展前景的污水脱氮除磷技术。64145

本论文以上海市实际市政污水作为研究对象，重点考察了改良复合式膜生物反应器的反硝化除磷性能，通过对各项进出水常规指标及污泥活性指标进行测定，评价系统对有机物及氮磷的处理效果，同时考察和分析系统内的污泥特性及微生物特性，优化该新型膜生物反应器的运行并研究其机理。

研究结果表明，竹园污水处理厂进水C/N比约为6，属于低碳源城市污水。A2O工艺和改进型A2O-MBR工艺对COD去除率分别为82.32%和85.49%；对TN的去除率为56.11%、68.14%；对TP的去除率分别为41.54%和83.68%。通过采用荧光原位杂交(FISH)及定量图像分析技术考察了反硝化聚磷菌（DPAO）占总聚磷菌（PAO）的比例，结果发现：改良复合式MBR中反硝化聚磷菌占总聚磷菌的54%，而在对照的A2/O工艺中，该比例仅为35%，这表明反硝化除磷的性能在改良复合式MBR中得到了一定程度的强化。

本论文研究结果对研究开发具有反硝化除磷功能的新型膜生物反应器具有一定的理论指导意义和参考价值。

毕业论文关键词：城市污水；A2O工艺；A2O-MBR工艺；脱氮除磷；反硝化除磷；PHA

毕业设计说明书（论文）外文摘要

Title   Study on the Operating Characteristics of the Membrane Bio-Reactor for Denitrifying Phosphorus Removal                                              

Abstract With the increasingly stringent requirements of nitrogen and phosphorus in municipal wastewater treatment plant emission standards, nutrient removal process was increasingly attracted widespread attention. Therefore, development of efficient nutrient removal technology is appeared to be necessary and urgent. Denitrifying phosphorus removal technology has a wide application in nutrient removal process.Because of its many advantages, such as saving of organies, decrease in greenhouse gas emission and less sludge production, this technique has broad development prospects in nitrogen and phosphorus removal of wastewater treatment.

In this pilot study, the actual municipal wasterwater in Shanghai was taken as an object and a modified hybrid membrane bioreactor with intermediate solid-liquid separator was also adopted.Some conventional indicators of water and activated sludge were measured to evaluate the removal of organic matter, TN and TP. Meanwhile, by the investigation and analysis of the sludge and microbial characteristics,the operation of MBR system was optimized and the mechaniam was studied 

The research shows that the influent C/N ration of Zhu Yuan is 6. For the A2O, improved A2O-MBR process, the COD removal rates are 82.32% and 85.49% respectively; the TN removal rates are 56.11% and 68.14% respectively; the TP removal rate are 41.54%and 83.68% respectively. The system gets the best condition when the MLSS maintains at 2~3 g/L and the DO maintains at 3~4 mg/L in the aerobic bank. FISH image analysis indicated that denitrifying phosphate accumulating organisms accounted for 36% of the total phosphorus accumulating organisms, while the ratio was 27% in A2/O process.The results indicated that denitrifying phosphorus removal performance in the novel MBR has been strengthened at some degree.

The results of this thesis have some theoretical significance and reference value on development of new membrane bioreactor of denitrifying phosphorus removal.