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Power requirement in non‐newtonian fermentation broth
Author(s) -
Taguchi Hisaharu,
Miyamoto Saburo
Publication year - 1966
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260080105
Subject(s) - impeller , carboxymethyl cellulose , non newtonian fluid , newtonian fluid , aeration , laminar flow , thermodynamics , chemistry , viscometer , dimensionless quantity , materials science , fermentation , chromatography , mechanics , viscosity , physics , food science , organic chemistry , sodium
Power requirements in the agitation of non‐Newtonian fermentation broths with and without aeration were measured by a strain gage‐type dynamometer. Broth from the production of gluc‐amylase by Endomyces species and carboxymethyl cellulose solutions were used as non‐Newtonian fluids. In gas–liquid agitation systems, the correlation between P g and P 0 2 ND 3 / Q 0.56 observed by Michel and Miller was found to be applicable to non‐Newtonian fluids in laminar and transition regions. This was particularly true for fluids with apparent viscosities larger than 300 cp. The impeller diameter and impeller blade width had considerable effects on power consumption in a nongassed system. It was suggested, therefore, that P g / P 0 should be correlated by a dimensionless term involving some impeller‐size factors.