Kvasny Prum. 1982; 28(4): 82-87 | DOI: 10.18832/kp1982018

Yeast biomass production in a multistage culture system.Peer-reviewed article

J. PÁCA

The effect of increasing ethanol concentration in the feed on the growth and physiological activity of the yeast Candida utilis was studied. The measurements of biomass, ehano1 and acetic acid concentrations, biomass yield and productivity and respiration activity were made at steady-states of continuous culture. All experiments were performed in three fermentors in series with constant values of dilution rate, temperature and pH of the medium. The maximum biomass concentration in the effluent and maximum productivity was achieved between 20 and 25 g ethanol per litre in the feed. At higher concentrations, ethanol negatively affects the coupling of oxidative phosphorylation and respiratory control of cells resulting in a decrease in biomass yield and intracellular protein content. It was proved that the presence of acetate in the medium inhibits the respiration activity of yeasts growing on ethanol.
(In Czech, English summary only)

Keywords: yeast biomass, production, ethanol

Published: April 1, 1982