后置缺氧A^2O/A-MBR工艺脱氮除磷特性研究

Study on Nitrogen and Phosphorus Removal by A^2O /A-MBR Process

介绍了太湖流域某城镇污水处理厂采用的A2O/A-MBR工艺及该工艺的主要特点。通过对污水处理厂的运行情况进行分析,研究了该工艺脱氮除磷的降解特性。监测数据表明,该工艺运行稳定可靠,出水水质稳定,达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)中的一级A排放标准,增加后置缺氧段的A2O/A-MBR工艺强化了脱氮除磷效果,对NH3-N、TN和TP的去除率分别为98.0%、78.8%和94.4%,并具有较强的耐冲击负荷能力。

The main features of the A^2 O /A- MBR process adopted in a municipal wastewater treatment plant in Taihu Lake basin were introduced. Based on the analysis of the practical operation data,the removal efficiency of nitrogen and phosphorus by the A^2 O /A- MBR process was studied. The monitoring data indicated that the combined process operated steadily,and the effluent quality met the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant（GB 18918- 2002）. The removal efficiency of nitrogen and phosphorus was enhanced by the A^2 O /A- MBR process. The removal rates of NH3- N,TN and TP were 98. 0%,78. 8% and 94. 4%respectively. The whole system showed strong resistance to impact load.