1 Oct 2005

MODELING AND PREDICTIVE CONTROL OF PELLET REACTORS FOR WATER SOFTENING

Authors: K.M. van Schagen, R. Babuska, L.C. Rietveld, J. Wuister, A.M.J. Veersma

Copyright (c) 2005 IFAC Publications

Abstract: A nonlinear chemical/physical dynamic model in the form of partial direrential equations was adopted and further developed to serve as a basis for model predictive control of a pellet reactor for drinking water softening. The model was calibrated using full-scale process measurements. A linear predictive controller based on a lineralization of the model has been designed to achieve the desired hardness of the effluent water through cost-effective operation of the reactor. This controller has been extensively validated in nonlinear simulations. The results are promising and the strategy found by the predictive controller leads to a moother operation compared to the currently used heuristic controller.

Keywords: drinking water, softening, modeling, model predictive control