Presented work aimed at determination of effect of various strains of yeast Saccharomyces
cerevisiae and concentration of fermentation worts on dynamics and efficiency of alcoholic
fermentation. Fermentation worts contained either thick juice or green syrup.
It was found that yeast strains designated as M1, M2 and D-2 most efficiently fermented
thick juice worts inoculated with yeast cream at a rate of 2 kgm3 of wort. Fermentation
processes lasted for approximately 2 days and ethanol yield approached 92e94% of the
theoretical yield. Fermentations of green syrup worts were most efficient (ethanol yield
reached 90e92% of the theoretical yield) when these processes were carried out by yeast
strains M1, M2, D-2 and As4 (inoculum e 2 kgm3 of wort).
S. cerevisiae strains M1 and M2 dynamically and efficiently fermented thick juice worts
with extract of 200 g kg1 and 250 g kg1 (89e94% of the theoretical yield) while strain D-2
preferred less dense worts (extract of 200 g kg1) and produced ethanol with the yield of
over 92% of the theoretical yield. The optimum green syrup worts extract was 200 g kg