污水处理厂的脱氮除磷改造

Reconstruction in N and P Removal in Wastewater Treatment Plants

结合城镇污水处理厂脱氮除磷改造工程实例,对老氧化沟进行功能区划分、设备改造:增加好氧区溶解氧浓度,降低缺(厌)区溶解氧浓度;同时适当增容,延长氧化沟水力停留时间和污泥泥龄。运行结果表明,系统出水主要指标稳定达到GB18918-2002一级A标准。

According to the reconstruction case in the town, classing function zone and improving equipment on oxidation channel. At the same time enforcing the DO concentration of aerobic zone, while decreasing the DO concentration of anoxic zone; meantime,cementing the capacity of oxidation channel to extend HRT and SRT. The results show that the key output indicators of the system stably achieve GB18918-2002 first-degree emission standards.