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In laboratory scale, submerged citric acid fermentation enabled to obtain similar to the industrial bioreactor volumetric oxygen transfer rate (kLa) amounted to 240 h-1. Nevertheless, such level of kLa seems not to be necessary for the process. Bioreactors used for the production of citric acid using Aspergillus niger W78B strain, assuring kLa at the 120 h-1 level in a overproduction phase, allowed...
The mixing and mass transfer have been investigated in industrial bioreactors of capacity 10,30,50 and 150 m cu.meter. used for citric acid fermentation.Hydrodynamic parameters were examined on water using mineral acid as a trace. Volumetric <mass transfer coefficient> (kLa) was determined by balance method. It was found that the examined <bioreactors> have similar <hydrodynamic parameters>...
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