中文摘要：

在利用ASM2d模型对城市污水处理厂氧化沟工艺进行动态模拟的基础上,将曝气能耗、污泥产量与出水水质超标率整合为一个综合效能指数,对该工艺进行了成本-效能分析。最优运行策略为：3~10月温度高于15℃时运行8台曝气转刷,其余时间段运行10台转刷,同时剩余污泥排放量控制在250 m3/d。这一策略能够使出水NH4-N和TN的超标率分别低于5%和2%,保证出水TP的持续达标,与常规运行策略相比,在明显降低氮磷超标率的同时,节省曝气能耗约12%。

英文摘要：

ASM2d model was employed for the dynamic simulation of a full-scale oxidation ditch process in a municipal wastewater treatment plant. The cost indicators including aeration energy and sludge production were integrated with the performance indicators of effluent violation to introduce a unified index as the evaluation criteria for the cost-performance analysis. The proposed optimal strategy is： 8 activated aerators for the operation from March to October with water temperature above 15℃, and 10 activated aerators for other periods, as well as the sludge discharge of 250 m3/d. This operational strategy could achieve effluent violation of NH4-N and TN below 5% and 2%, respectively, and no effluent violation of TP. Compared with baseline strategy, the aeration energy could be saved by 12% with significant reduction of effluent violation of nitrogen and phosphorus.