In comparison, another type of yeast, Pichia stipitis, takes up to
200 h to consume all sugar in the hydrolyzate when the
concentration of starting sugar is approximately 45 g/L (Telli-
Okur and Eken-Saraçoglu, 2008). P. stipitis is among one of the most
common types of yeasts used to produce ethanol due to its ability to
utilize variety of sugars (Lee et al., 2000). However, its low tolerance
to inhibitory products and slow ethanol production cause the yeast
to be less preferable as an ethanol fermenter