Non-linear multivariable adaptive control of an activated sludge wastewater treatment process

In this paper a non-linear adaptive feedback-linearizing control is designe d for a biological wastewater treatment model. The adaptive control structu re is based on the non-linear model of the process and combined with a join t observer estimator which plays the role of the software sensor for the on -line estimation of biological states and parameter variables of interest o f the bioprocess. The performances of both estimation and control algorithm s are illustrated by simulation results. They demonstrate effectiveness and significant robustness against measurement noises and kinetic parameter ju mps. Copyright (C) 1999 John Wiley & Sons, Ltd.