Growth kinetics of sulfur-oxidizing bacteria and kinetic models
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| Year of publication | 2008 |
| Type | Conference abstract |
| MU Faculty or unit | |
| Citation | |
| Description | The purpose of this study was to investigate changes in growth and oxidation kinetics in cultures of Acidithiobacillus ferrooxidans to evaluate their application for kinetic models. The values of maximum sulfur oxidation rate (v) and growth yield on sulfur (Y) were determined from data obtained in 86 batch cultures. Both the constants demonstrated very different values in different cultures of the same strain. No significant correlation between the v and Y values was observed. Two metabolic phases of ATP formation were observed. During the second one, the rate of cell growth did not correlate with the rate of ATP formation. Apparent Michaelis constant for sulfur in resting cells was dependent on cell concentration. Traditional kinetic approaches (exponential growth, the Monod equation) could be used for data of cell growth and sulfur oxidation. However, the above variations of kinetic constants represented substantial limits for the kinetic model application to predict the bioprocess course. |
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