Variation of the ethanol yield during oscillatory concentrations changes in undisturbed continuous ethanol fermentation of sugar-cane blackstrap molasses

During the oscillatory phase of an undisturbed continuous ethanol fermentat ion of sugar-cane blackstrap molasses, the relative ethanol yield oscillate d between 70 and 92% of the theoretical value (0.511), while its actual val ue was 85.6%. The ethanol yield based on catabolic activity oscillated betw een 0.290 and 1.174 g/kcal, while its actual value was 0.686 g/kcal. The sp ecific production rate of ethanol increased when the specific growth rate o f the yeast cells increased; a linear equation correlates the above specifi c rates.