Bond Graph modeling of a baker´s yeast bioprocess

The modeling of bioprocesses is a difficult task, because of the high interaction degree of the phenomena, nonlinearities, and uncertainties of reaction kinetics. Bond Graph method is an appropriate tool for modeling such nonlinear processes. In this paper, the so-called pseudo Bond Graph method is proposed as a modeling technique for a baker´s yeast process, widely used in bioindustry. First, the pseudo Bond Graph method is applied in order to model a prototype bioprocess starting from the reactions schemes and taking into account the biochemical phenomena. Then the obtained rules are applied on a complex baker´s yeast process, which is carried out into a Continuous Stirred Tank Bioreactor. The obtained Bond Graph models and several simulations are conducted using 20sim modeling and simulation environment.