Extracellular microbial polysaccharides: Generalized power law for biopolysaccharide solutions.
A generalized power low model, eta = eta(0)[1+(gamma/gamma(0)](N - 1), is shown to described satisfactorily the shear viscosity data for xanthan gum solutions from 0.18 g/L to nearly 4 g/L and low to intermediate shear rates. Since mixing, mass and heat transfer, residence time distributions, and power input for agitation and aeration all depend on shear viscosity, this equation provides a simple prediction of this important quantity over the shear rate ranges characteristic of fermentations.
Chang
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Department of Chemical Engineering, University of California, Davis, California 95616, USA.
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