Abstract
Highly viscous media often occur in biotechnology, fermentation and food processing industries as well as in chemical and pharmaceutical industries. The present paper considers the behavior of aerated highly viscous media employing stirred tank reactors, sparged single and multistage tower reactors.Measuring methods to determine rheological properties, hydrodynamical behavior, power input, and mass transfer as well as behavior of single bubbles and bubble swarm are reviewed.Hydrodynamical properties, power inputs, oxygen transfer rates, volumetric mass transfer coefficients and heat transfer coefficients are considered as a function of the mean operating parameters employing stirred tank reactors with different impellers. Also sparged single and multistage tower reactors are treated, especially hydrodynamical properties, oxygen transfer rates and volumetric mass transfer coefficients. Relationships are given to lay out stirred tank and tower reactors with highly viscous media.KeywordsOxygen TransferBubble ColumnPerforated PlateOxygen Transfer RateGlycerol SolutionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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