Kinetic parameters of continuous cultures of Bacillus thermoleovorans sp. A2 degrading phenol at 65 degrees C

In this paper, we report on the kinetics of phenol degradation and cell growth in continuous cultures of suspended cells of Bacillus thermoleovorans sp. A2 at 65 degrees C. A high yield coefficient of Y(x/s)=0.84 g cell dry weight g(-1) phenol was measured at a dilution rate of 0.5 h(-1). At the sam...

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Bibliographic Details
Published in:Journal of biotechnology 2003-06, Vol.103 (2), p.129
Main Authors: Feitkenhauer, Heiko, Schnicke, Stephanie, Müller, Rudolf, Märkl, Herbert
Format: Article
Language:English
Subjects:
Bacillus - growth & development
Bacillus - metabolism
Biodegradation, Environmental
Bioreactors - microbiology
Culture Media
Hot Temperature
Kinetics
Minerals
Models, Biological
Oxygen - metabolism
Phenol - metabolism
Quaternary Ammonium Compounds - metabolism
Waste Disposal, Fluid - methods
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Summary:In this paper, we report on the kinetics of phenol degradation and cell growth in continuous cultures of suspended cells of Bacillus thermoleovorans sp. A2 at 65 degrees C. A high yield coefficient of Y(x/s)=0.84 g cell dry weight g(-1) phenol was measured at a dilution rate of 0.5 h(-1). At the same dilution rate the coefficient for maintenance metabolism (m(s)) was determined to be 0.045 g phenol g(-1) cell dry weight h(-1). The maximal growth rate (wash-out) determined at a phenol inlet concentration of 188 mg l(-1) was 0.9 h(-1). Up to 7 g phenol l(-1) per day were degraded in a continuously operated 2-l stirred tank reactor with suspended cells (feed concentration 660 mg l(-1)). Additionally, yield coefficients for oxygen and ammonium are reported.
ISSN:0168-1656
DOI:10.1016/S0168-1656(03)00105-6