Ethanol yields produced by K. marxianus IMB 3 at 96 and 120 h
were similar to S. cerevisiae D5A (p > 0.05). Ethanol production by
IMB 1, IMB 2, IMB 4, and IMB 5 slowed after 72 h while IMB 3 continued fermentation until 96 h. The results of this work show that
the K. marxianus IMB 3 strain has potential to be used for ethanol
production in SSF processes at 45 C. Reducing the pH of the buffer
used in SSFs with S. cerevisiae D5A at 37 C from 5.5 to 4.8 resulted
in lower ethanol yields, as was previously observed with K. marxanus IMB 4