Abstract

GOMEZ-ACATA, R.V.; LARA-CISNEROS, G.; FEMAT, R.  and  AGUILAR-LOPEZ, R.. On the dynamic behaviour of a class of bioreactor with non-conventional yield coefficient form. Rev. Mex. Ing. Quím [online]. 2015, vol.14, n.1, pp.149-165. ISSN 1665-2738.

The goal of this work is to analyze by numerical bifurcation the dynamical behavior of a class of continuous bioreactor used to hydrolyze cellulose using Cellulomonas cellulans, talcing into account the effect of mo deling the growth rate of this microorganism by six different kinetics models (monotonic and non-monotonic). Furthermore, it is considered that the biomass yield can be modeled as a constant or a variable case, for the variable case, a substrate dependent Gaussian-type function was proposed. The proposed non-conventional yield function is a realistic appro ach that describes the behavior of the cellular yield, unlike other model_t, this one Is bounded to the maximum cellular yield and can be extrapolated to several operation conditions. Numerical results show changes in the equilibrium branches due to the kinetic growth model used. The non-conventional model of biomass yield produces a shift in the steady state multiplicity intervals, and new limit cycles were found with certain specific values of dilution rate and substrate feed.

Keywords : bifurcation analysis; continuous flow; limit cycle; local stability analysis; steady-state multiplicity; unstructured kinetic models.