Volume 40, Issue 5 pp. 878-888
Research Article

Volumetric Mass Transfer Coefficient in Fermenters: Scale-up Study in Viscous Liquids

Radim Petříček

Corresponding Author

Radim Petříček

University of Chemistry and Technology, Chemical Engineering Department, Technická 5, 166 28 Praha 6, Czech Republic

Correspondence: Radim Petříček ([email protected]), University of Chemistry and Technology, Chemical Engineering Department, Technická 5, 166 28 Praha 6, Czech Republic.Search for more papers by this author
Libor Labík

Libor Labík

University of Chemistry and Technology, Chemical Engineering Department, Technická 5, 166 28 Praha 6, Czech Republic

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Tomáš Moucha

Tomáš Moucha

University of Chemistry and Technology, Chemical Engineering Department, Technická 5, 166 28 Praha 6, Czech Republic

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František Jonáš Rejl

František Jonáš Rejl

University of Chemistry and Technology, Chemical Engineering Department, Technická 5, 166 28 Praha 6, Czech Republic

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Lukáš Valenz

Lukáš Valenz

University of Chemistry and Technology, Chemical Engineering Department, Technická 5, 166 28 Praha 6, Czech Republic

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Jan Haidl

Jan Haidl

University of Chemistry and Technology, Chemical Engineering Department, Technická 5, 166 28 Praha 6, Czech Republic

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First published: 23 January 2017
Citations: 3

Abstract

In the design of mechanically agitated fermenters, the volumetric mass transfer coefficient kLa often becomes the key parameter. In case of viscous liquids, kLa prediction based on literature correlations suffers from a wide distribution. The aim is to provide reliable kLa correlations based on a large experimental data set obtained using the dynamic pressure method, the physical correctness of which was verified earlier. Multiple-impeller fermenters of two scales were used. The impeller tip speed, rather than the power input, revealed to be the proper term for prediction of kLa. When the impeller power number is used, kLa values for various impeller types can be predicted by a common correlation which, based on a wide range of operational conditions, can be applied in the design.

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