ISER

For a nonlinear model of a wastewater treatment process the input-output static caracteristics are studied with respect to uncertainties in process parameters. Computer simulations and visualizations are performed in Maple to show how these uncertainties influence the efficiency of the bioreactor.

The stability characteristics of a nonlinear model of a continuously stirred tank bioreactor with cell recycle are studied. Assuming that some practically important model parameters are uncertain, existence of bifurcations of equilibrium points is shown. The dynamic behaviour of the system near bifurcation points is also demonstrated. Numerical simulations in the computer algebra system Maple are presented.