Abstract
Volumetric gas-liquid mass transfer coefficients were measured in suspensions of cellulose fibers with concentrations ranging from 0 to 20 g/L. The mass transfer coefficients were measured using the dynamic method. Results are presented for three different combinations of impellers at a variety of gassing rates and agitation speeds. Rheological properties of the cellulose fibers were also measured using the impeller viscometer method. Tests were conducted in a 20 L stirred-tank fermentor and in 65 L tank with a height to diameter ratio of 3:1. Power consumption was measured in both vessels. At low agitation rates, two Rushton turbines gave 20% better performance than the Rushton and hydrofoil combination and 40% better performance than the Rushton and propeller combination for oxygen transfer. At higher agitation rates, the Rushton and hydrofoil combination gave 14 and 25% better performance for oxygen transfer than two Rushton turbines and the Rushton and hydrofoil combination, respectively.
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© 1997 Humana Press Inc.
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Dronawat, S.N., Svihla, C.K., Hanley, T.R. (1997). Effect of Impeller Geometry on Gas-Liquid Mass Transfer Coefficients in Filamentous Suspensions. In: Davison, B.H., Wyman, C.E., Finkelstein, M. (eds) Biotechnology for Fuels and Chemicals. Applied Biochemistry and Biotechnology, vol 63-65. Humana Press. https://doi.org/10.1007/978-1-4612-2312-2_32
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DOI: https://doi.org/10.1007/978-1-4612-2312-2_32
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