Functional states modelling of batch aerobic yeast growth process

An application of functional states modelling approach for aerobic batch baker's yeast fermentation is presented in this paper. The functional states help in monitoring and control of complex processes such as bioprocesses. The main idea is to use a two-level hierarchy where on the top level the process is divided into macrostates, called functional states, according to behavioural equivalence. In a functional state, the process is described by a conventional type of model, called local model, which is valid in this functional state. To illustrate the concept of functional states in fermentation processes, experimental data and simulations of an aerobic batch baker's yeast fermentation are presented.