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Robust Feedback Control Designfor a Nonlinear Wastewater Treatment Model

Published online by Cambridge University Press:  02 October 2009

M. Serhani ,
N. Raissi  and
P. Cartigny
M. Serhani*
Affiliation:
FSJES, University My Ismail, B.P. 3102, Toulal, Meknes, Morocco
N. Raissi
Affiliation:
EIMA, FS, University Ibn Tofail, B.P. 133, Kénitra, Morocco
P. Cartigny
Affiliation:
GREQAM, University la Méditerranée, 2 rue de la Charité, 13002 Marseille, France
*
mserhani@hotmail.com
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Abstract

In this work we deal with the design of the robust feedback control of wastewater treatment system, namely the activated sludge process. This problem is formulated by a nonlinear ordinary differential system. On one hand, we develop a robust analysis when the specific growth function of the bacterium μ is not well known. On the other hand, when also the substrate concentration in the feed stream sin is unknown, we provide an observer of system and propose a design of robust feedback control in term of recycle rate, in order to keep the pollutant concentration lower than an allowed maximum level sd.

Keywords

wastewater treatmentdynamical systemsstabilityrobustnessfeedback controlactivated sludge
Type
Research Article
Information
Mathematical Modelling of Natural Phenomena , Volume 4 , Issue 5: Modelling of geographical processes and natural resources , 2009 , pp. 128 - 143
Copyright
© EDP Sciences, 2009

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