3-1042 at 37 C were higher than at 30 C. At 40 C, after
48 h of fermentation, DMKU 3-1042 produced highest
concentration of ethanol (7.23% w/v) among the four,
and this was only slightly lower than that obtained at
37 C (7.43% w/v); this was reflected in its productivity at
40 C (1.51 g/l/h), which was higher than at 37 C
(1.03 g/l/h). The other three strains produced ethanol at
concentrations of 6.43–6.85% (w/v). However, increasing
the fermentation temperature of these four strains from
40 C to 45 C resulted in drastically decreased maximal
ethanol concentrations and productivities (Table 1). At
45 C, the highest ethanol concentration (4.93% w/v) was
obtained by DMKU 3-1042. Therefore, the strain DMKU
3-1042 was selected for further studies.
Study of ethanol fermentation by the strain DMKU 3-
1042 of a sugar cane juice medium composed of sugar cane