This work considers the continuous production of acetic acid by the homoaeetogenic and thermophilic bacterium Acetogeniurn kivui. A mathematical model for the growth kinetics has been developed. The unstructured model for growth and product formation includes product and substrate inhibition as well as maintenance energy effects. The associated model parameters have been identified by non-linear optimization and evidenced experimentally in continuous culture as steady-state data. By using a mineral medium with glucose as the energy and carbon source for the bacteria proper carbon balances are available. The model permits good predictions of steady-state concentrations.

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