改良型双污泥工艺处理低C/N城市污水

目的]优化双污泥工艺存在的缺陷。方法]采用改良型双污泥工艺处理人工配制模拟生活污水,测定处理前后水质并进行比较。结果]系统出水COD〈40 mg/L、TN〈15 mg/L、氨氮〈3 mg/L、TP〈0.5 mg/L,均达到了《城镇污水处理厂污染物排放标准》（GB18918-2002）的一级A标准。结论]改良型双污泥工艺不仅可以解决硝化细菌与除磷菌之间的泥龄矛盾问题,而且较适合处理低C/N条件下的城市污水。

Treatment of Low C/N Urban Sewage by New Type Two-sludge Process

Objective]The research aimed to optimize two-sludge process,and to clear up the problem in this process.Method]Simulated sewage was prepared and treated by new type two-sludge process.Then the qualities of pre-treated and after-treated simulated sewage were determined and compared.Result]The results showed that in the experiment,the quality of effluent sewage(COD<40 mg/L,TN<15 mg/L,NH3-N<3 mg/L,TP<0.5 mg/L) can achieve the classⅠ-A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB18918-2002).Conclusion]These results indicated that the new type two-sludge process could not only resolve nitrifying bacteria and phosphorus removal bacteria contradiction between the sludge age problem,and could also be used for dealing with low C/N urban sewage.