Gain scheduled predectived control for integrated wastewater systems in storm conditions

The aim of this paper is to demonstrate the application of integrated control in minimizing the effect of wastewater treatment plants (WWTP) and overflows on a river basin under wet weather conditions. An Integrated Urban Water System comprised of the WWTP, river and sewer is considered. The control strategy is based on model predictive control, which enables the physical and quality constraints to be explicitly incorporated into the control solution. Model based predictive control of dissolved oxygen that considers the entire integrated process is presented. The linear control method used is extended to this nonlinear system using fuzzy gain-scheduling. Simulation results are presented to demonstrate the effectiveness of the proposed integrated control system.