This paper deals with the isolation of yeasts from molasses and
grapes, and further evaluation of bioethanol production in commercial media. Selected strains were taxonomically characterized
and assayed for optimizing some operational variables and the use
of sugarcane molasses as economic fermentative medium. Finally,
the noflocculent A2 strain was employed to scale up the process
aiming to achieve an industrial application
strains with increased tolerance to stress conditions in industrial
fermentation: high concentrations of ethanol, sugar and CO2
pressure and low O2pressure and low pH[10]