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Xanthan production in an external‐circulation‐loop airlift fermenter
Author(s) -
Kessler Wolfgang R.,
Popović Milan K.,
Robinson Campbell W.
Publication year - 1993
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.5450710114
Subject(s) - industrial fermentation , airlift , xanthan gum , fermentation , xanthomonas campestris , viscosity , chemistry , pulp and paper industry , bioreactor , food science , materials science , rheology , engineering , composite material , biochemistry , gene , organic chemistry
A preliminary study of xanthan production by Xanthomonas campestris was performed in an external‐circulation‐loop airlift (ECL‐AL) fermenter. An average of 25 g/L xanthan of good viscosity characteristics was obtained in a total fermentation time of 49 hours. Oxygen limitation was observed after 36 hours of fermentation time. It is conclusively demonstrated that the ECL‐AL fermenter can be used to economically produce xanthan. The key operating and design features are the liquid height, downcomer‐to‐riser cross‐sectional area ratio ( A D / A R ) and the orfice diameter of the air sparger.