Studies of the Saccharomyces cerevisiae Cultivation under Oscillatory Mixing Conditions

Abstract

Saccharomyces cerevisiae was cultivated under non-aerated conditions in a 5 l laboratory bioreactor. Using the experimental data and the regression analysis method, some mathematical correlations for stirrer rotational speed oscillation frequency and the reaction of the yeast were established. It has been found that different growth parameters are influenced variously by stirrer rotational speed and stirrer rotational speed oscillation frequency. Stirring oscillations can be among the methods for stimulation of biotechnological processes. The obtained results can be used for designing bioreactors and optimizing working conditions.

Keywords

• bioreactor
• mixing
• stirrer rotational speed oscillations
• Saccharomyces cerevisiae