鹤山市某城镇污水处理厂脱氮除磷工艺改造实践

Reconstruction Practice of Nitrogen and Phosphorus Removal Process in a Wastewater Treatment Plant of Heshan City

鹤山市某城镇污水处理厂由于早期设计存在缺陷,出水的氨氮和总磷一直未能稳定达标。为满足达标排放的要求,在不新增主体构筑物的情况下,通过增加混合液回流系统、完善污泥回流系统、改进污泥处理流程等,将原污水处理工艺改造成为A2/O工艺,使该城镇污水处理厂处理工艺具备了脱氮除磷的功能。改造后出水水质能达到排放标准的要求。

Because the original design of a wastewater treatment plant of Heshan City had flaws, the effluent nitrogen and phosphorus were not able to reach the discharge standard. In order to meet the discharge standard, under the condition of not adding new structure, the original wastewater treatment process was reconstructed into A^2/O process by adding a mixed-liquor return system, improving the sludge recycle system, and ameliorating the sludge treatment processes. The effluent quality after reconstruction can steadily achieve the discharge standard.