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Effect of tank size on k L a and mixing time in aerated stirred reactors with non‐newtonian fluids
Author(s) -
Gabelle J.C.,
Augier F.,
Carvalho A.,
Rousset R.,
Morchain J.
Publication year - 2011
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20571
Subject(s) - carboxymethyl cellulose , mixing (physics) , aeration , rheology , xanthan gum , viscosity , non newtonian fluid , mass transfer , scale up , thermodynamics , power consumption , newtonian fluid , bioreactor , chemistry , materials science , mechanics , chemical engineering , physics , power (physics) , engineering , classical mechanics , organic chemistry , quantum mechanics , sodium
Abstract The most important scale‐up parameters of aerated bioreactors are investigated in 42 and 340 L vessels, with water and various xanthan gum and carboxymethyl cellulose solutions. The study focuses mainly on mass transfer ( k L a ) measurements under various operating conditions. The relevance of existing correlations is discussed. The traditional viscosity‐contribution approach appears unable to predict the changes in k L a during scale‐up and an alternative formulation is proposed. The effect of rheology on power consumption and mixing time is in fair agreement with works published on this topic.