Gain Scheduling control of dissolved oxygen concentration in a wastewater treatment process

The paper deals with the robust control of the dissolved oxygen concentration in the case of wastewater treatment processes. The Gain Scheduling control method has been chosen for the dissolved oxygen concentration control. Firstly the dissolved oxygen control loop was experimental identified in various operating points. The Gain Scheduling strategy was designed so that the behaviour of the closed loop system to be the same around the mentioned operating points. The Gain Scheduling control strategy of the dissolved oxygen concentration was tested by simulation and using an experimentally pilot plant that is also presented in the paper.