Research of the Dissolved Oxygen Intelligent Control System in the Aeration System of Wastewater Treatment

Abstract

Based on these characteristics of dissolved oxygen control in sewage treatment aeration process, such as nonlinearity, large time delay in a timely manner and difficult to model accurately, this paper puts forward an intelligent control strategy of dissolved oxygen. First, make intelligent dynamic dissolved oxygen value setting according to water quality parameters as the feed forward control, and then Fuzzy PID control and conventional PID control fan control systems compose a cascade control system to ensure the stability of dissolved oxygen value in given value. I used the simulation and experimental analysis. The results show that under the condition of ensuring water quality, the control strategy can reduce aeration energy consumption and guarantee the stability of system.