http://bioprocesos.unq.edu.ar/Biopro%20II/Paper%20escalado.pdf

Bioreactor scale-up and oxygen transfer rate in microbial processes: An overview

Xanthan gum: production, recovery, and properties.

Production, recovery and applications of xanthan gum by Xanthomonas campestris

Oxygen transfer and uptake rates during xanthan gum production.

Xanthan gum production under several operational conditions: molecular structure and rheological properties*

The microbial polysaccharide xanthan was produced by cultivation of Xanthomonas campestris in four stirred tanks with volumes ranging from 0.072 to 3 m3. Many of the previously suggested correlations for the volumetric mass transfer coefficient described the present data very unsatisfactorily. When Rushton turbines were employed as stirrers, the experimental results agreed well with a correlation suggested by Kawase and Moo-Young; for the more energy-efficient INTERMIG impellers, this correlation was modified by a factor of three. Constant specific oxygen transfer rate was found to be the appropriate scale-up criterion for constant space-time yield and constant product quality, specifically, the molar mass which determines the viscosity yield.

Xanthan production in stirred tank fermenters: Oxygen transfer and scale‐up

The influence of agitation rate on Xanthan production in a baffled stirred tank reactor is reported. To separate the hydrodynamic effect of agitator speed on any slime layer from the influence on oxygen mass transfer, oxygene-enriched air was used. Furthermore, the influence of agitation speed on the molecular weight distribution was studied

Holger Herbst

Papers

Xanthan production in stirred tank fermenters: Oxygen transfer and scale‐up

The influence of agitation rate on xanthan production by Xanthomonas campestris

Zum Stoffübergang bei Xanthan-Fermentationen