The reduced model of self-oscillating dynamics in an anaerobic system with sulfate-reduction

A reduced model of self-oscillating dynamics in an anaerobic system with sulfate reduction was developed using the experimental data of Parkin et al. (1990) where anaerobic chemostats were maintained at changing acetate/sulfate influent concentrations. This model was originated from the general model of an anaerobic system suggested earlier for the description of Parkin's experiments (Vavilin et al., 1994). Using the reduced model the oscillating phenomenon was investigated, where hydrogen sulfide inhibition to biomass growth, pH level influence on the equilibrium between ionized and non-ionized forms of sulfide and a relatively small volume of the gaseous phase were the main factors of oscillating dynamics. (C) 1997 Elsevier Science B.V.