改良A^2／O工艺在城市污水中的应用

针对石家庄市桥西污水处理厂二期工程采用的改良A^2／O工艺的3种不同工况；并结合该厂污水处理工艺流程和实际运行情况进行了论述。运行结果表明：改良A^2／O处理效果稳定，除磷脱氮效果明显，适宜应用于大型污水处理厂，经过二级处理，出水能够达到排放标准，三级处理后可作为中水回用。’

Application of improved A^2/O process in treatment of municipal sewage

This paper discusses the three processes of the modified A^2/O adopted in phase two of the project in a sewage treat- ment plant, in view of its process flow and the actual operation situation. The running results show that the improved A^2/O treatment effect is stable, and the phosphorus and nitrogen removal effect is good, suitable for large-scale sewage treatment plant. The effluent can meet the national discharge standards through secondary treatment, and the effluent after the third class treatment is capable of the use as reclaimed water.