Modeling, simulation and control of the inflow basin of a wastewater treatment plant

Abstract

Inflow basin is an important component for wastewater treatment plant, which can equalize the hydraulic and composition variations of wastewater inflow and stabilize the performance of nutrition and toxicants removal and energy removal in subsequent processes when discharge and component of sewage varies.

In this thesis, the simulations with different MPC’s parameters setting are designed, run and analyzed. The PI controller is tuned by the Skogestad’s tuning method. Both the MPC and PI controller are implemented in a dynamic simulator that is based on a discretized mathematical model of the inflow basin. As the result of well-designed modeling, simulation and control, the MPC with the optimized parameters setting and the Gain schedule of PI controller are verified and established. The simulation data is logged and analyzed graphically and numerically, which shows that the MPC can serve to maintain a good balance between the stability of the basin level1 and the smoothness of the pumps flow