process and efficiency of operation in the factory[7].
Saccharomyces cerevisiaeis the main species of yeast employed
for ethanol production at industrial level since this microorganism
is easy to handle, shows no high nutritional needs, can produce
ethanol concentrations above 15%[8], tolerates high concentrations
of sugars, is not expensive, produces low levels of by-products, is
osmotolerant and presents high viability for recycling[9].