Results and Discussion
Biomass and ethanol yields, after cultivation
with 5 %, 10 % and 15 % of lactose into the media
by 5 yeast strains of Kluyveromyces marxianus in
aerobic conditions at 30 °C, 34 °C and 37 °C, are
illustrated in Figures 1 and 2, respectively.
In figures 1 and 2 it is possible to see that all
yeast strains have fermented lactose at different
mass fraction (5%-15%) in whey media. The strain
Kluyveromyces marxianus DS12 in the same conditions
have given the lowest yields. However, it
seems that two yeast strains of Kluyveromyces
marxianus, ZIM75 and VST44, have given the best
results for alcoholic fermentation.
Statistical analysis of the data (Table 1) for the
biomass yield after alcoholic fermentation in aerobic
conditions at different temperatures has pointed
out, that there is a significant difference (p < 0.05)
between five strains of Kluyveromyces marxianus
with regard to the biomass yield, but the temperature
and lactose concentration have no significant
influence on it