Abstract：Activated sludge models (ASMs) have been widely applied in wastewater treatment plant design and control.ASM1 was used to optimize the control strategy of oxidation ditch in Jiaozuo wastewater treatment plant.The influence of three parameters on effluent quality, including anoxic zone, mixture liquid circumfluence and DO, were analyzed through simulation.According to the simulation analysis of the effluent under different condition, the ideal, which operating parameters are the ratio of anoxic zone and aeration zone of 1∶2, mixture liquid circumfluence percent of 200%, the DO of aeration zone of 3.0mg/L respectively are put forward.Under this condition, the energy consumption is reduced and the capacity against shock load is increased.

Keyword：activated sludge process;mathematical model;oxidation ditch system;energy consumption