Abstract

MORALES-DIAZ, A.  and  CARLOS-HERNANDEZ, S.. Saturated control design for bounded substrate regulation in a continuous anaerobic bioreactor. Rev. Mex. Ing. Quím [online]. 2010, vol.9, n.2, pp.219-229. ISSN 1665-2738.

The aim of the study presented in this paper is the synthesis of a new saturated control, which forces the substrate concentration to reach a pre-specified bounded region without performance degradation in the bioreactor operation. The proposed controller is designed to achieve performance despite input disturbance and kinetic parameters uncertainties; it is based on an exponential bounded function that allows a smooth and fast convergence by setting a tuning parameter in the exponential function. A stability analysis based on the Lyapunov theorem and also some tuning guidelines are presented. Finally, the applicability of the proposed controller is illustrated via numerical simulations in a model representing a CSTR in continuous operation mode.

Keywords : anaerobic bioreactor; saturated control; substrate regulation.