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1

The influence of the tower air-lift bioreactor geometry on the oxygen transfer rate in the apparatus

100%
Gluszcz P., Michalski H.
Biotechnologia
|
1993
|
issue 3
16-30
EN
The hydrodynamic and mass transfer parameters in water, in several types of tower-loop air-lift bioreactor were investigated. The following configurations of the apparatus were used for experiments: with , internal-loop with static mixers in the draft tube, with various circulation tube diameters (0 more thet Ad/Ar more thet 1), external-loop with perforated plates in the main zone (multistage reactor). The highest kla coefficients were-loop with perforated plates in the main zone (multistage reactor). The highest kla coefficients were obtained in external-loop multistage reactor. Ad/Ar ratio had significant influence on the main process parameters: , , transfer coefficient and mixing time.
2

Bioreactor modification for plant cell culture

70%
Chmiel A., Jezus de M., Schwitzguebel J.-P., Zryd J.-P.
Biotechnologia
|
1993
|
issue 3
56-60
EN
for plant cell culture was improved. Diameter of the upper part of the bioreactor, was expanded from 155 to 220 mm. Function of a draughtube was changed from a suspension riser to a downcomer. Instead of original aeration tube with holes stainless steel sintered air sparger was introduced. As a result the aeration rate was reduced sixfold for the same kLa value, and the culture foaming and cell deposit on the bioreactor wall was markedly limited.
3

Engineering aspects of the A.Niger cultivation in a tower air-lift bioreactor

61%
Gluszcz P., Jamroz T., Sencio B.
Biotechnologia
|
1993
|
issue 3
38-47
EN
Changes of the main hydrodynamical and parameters during. in a pilot plant external-loop were investigated. the final average concentrations of biomass and citric acid obtained in experimental fermentations were 10.5g/l and 96.6 g/l, respectively. Significant influence of the increasing biomass concentration on the apparent viscosity of the broth, gas holdup, liquid velocity and volumetric oxygen transfer coeficient was found.
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