溶解氧静态和动态控制技术的探讨与应用

Discussion and Application of Dissolved Oxygen Static and Dynamic Control System

文中探讨了溶解氧静态和动态控制技术在采用生物池两段进水工艺的上海某污水处理厂的工程应用。实际运行情况表明:当采用溶解氧静态控制的28 d中,进水COD_(Cr)为184.8 mg/L,进水氨氮为23.5 mg/L,鼓风机吨水电耗为0.083 kW·h/t;而当采用溶解氧动态控制的28 d中,相比静态溶解氧均值降低了0.75 mg/L左右,进水COD_(Cr)为213.7 mg/L,进水氨氮为20.5 mg/L时,鼓风机吨水电耗为0.077 kW·h/t。动态控制相比静态控制,鼓风机能耗降低了7.2%,碳源投加量降低了20.7%。

This paper discusses the engineering application of dissolved oxygen static and dynamic control technology in a sewage treatment plant in Shanghai that adopts the two-stage inflow process of biological pool.Actual operation situation shows that when the static control of dissolved oxygen is used for 28 days,when the COD_(Cr) of influent is 184.8 mg/L and the ammonia nitrogen of influent is 23.5 mg/L,the water and electricity consumption per ton of the blower is 0.083 kW·h/t.When the dissolved oxygen dynamic control is adopted for 28 days,the average value of dissolved oxygen is reduced by about 0.75 mg/L compared with the static dissolved oxygen,the COD_(Cr) of the influent water is 213.7 mg/L,and the ammonia nitrogen of the influent water is 20.5 mg/L,and the water and electricity consumption per ton of the blower is 0.077 kW·h/t.Compared with static control,dynamic control reduces the energy consumption of blower by 7.2% and the carbon source dosage by 20.7%.