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1

The influence of immobilization on the overall rate of substrate biodegradation by bacterial cells

100%
Wojnowska-Baryla I.
Biotechnologia
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1997
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issue 3
88-99
EN
The paper includes the results of mass transfer influence on the overall rate of substrate biodegradation by bacterial cells immobilized in alginate gel. The overall rate of substrate biodegradation by immobilized bacteria is the function of the following parameters: ref = f (rmax, kl2, Deff). The results indicate that overall ratio of substrate biodegradation by immobilized bacteria is limited by external and internal transport. The effectiveness of the substrate biodegradation depends on the value of overall effectiveness factor. When limiting the overall rate of substrate biodegradation by the diffusion in a phase liquid-beads surface, the effectiveness factor is the function of Damkohler number. In the case of the internal diffusion limiting the overall rate of substrate biodegradation by immobilized bacteria the effectiveness factor depends on the Thiel number.
2

Characteristics of the ability to uptake cadmium by free and immobilized bacteria Kliebsiella pneumoniae

88%
Wojnowska-Baryla I., Stolarczyk E., Gredzinska A.
|
|
issue 4
103-112
EN
The ability to uptake cadmium of the following biosorbents: alginate gel, free and immobilized in alginate bacteria Kliebsiella pneumoniae was characterized. An average efficiency of cadmium removal from solution with initial cadmium concentration range from 1 to 200 mg Cd2+?dm-3 was 78,6% by alginate gel and immobilized bacteria Kliebsiella pneumoniae and 60% by free bacteria. The maximum efficiency of cadmium removal from solution with initial concentration 1 mg Cd2+? dm-3 was obtained for bacteria immobilized in alginate gel.
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