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基于成本-效能分析的氧化沟工艺运行条件优化

Keywords: 活性污泥模型,成本-效能分析,氧化沟,脱氮除磷

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Abstract:

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250m3/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%。

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