Abstract
A computationally efficient method is described for the identification of two parameters and a metabolic coefficient contained in a spatially distributed model of an external loop airlift fermenter. The two parameters describe the spatially dependent volumetric oxygen transport coefficient between the gas and liquid phases. The simultaneous identification of a metabolic coefficient allows the identification to be performed using only on-line available measurements and provides additional information for other estimation/ identification routines. The algorithm is based on both the Newton and a quasi-Newton iterative search method. Factors leading to the good performance of the method include the direct calculation of first derivative information using orthogonal collocation and an analysis of the characteristics of the identification problem which has led to a reduction in interactions between the parameters.
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