Adaptive Feedback Controller for Dosage of Water Treatment Chemicals

Abstract This paper describes an adaptive feedback PI-type controller for dosing of water treatment chemicals. The controller is based on Linguistic Equation (LE) method. The adaptive feedback LE-controller suits well for chemical dosage in such processes where fast adaptation of the controller is required. The performance of adaptation is based on identification of process states. The adaptive model modifies control parameters according to this knowledge. As a result, the adaptive LEcontroller can operate at the large range of process conditions. The control strategy for a flotation application was developed. Tuning and testing of the controller were carried out in a dynamic simulator. The controller operates moderately well in the simulator.