The industries of alternative energy sources are trying to reduce the utilization of fossil fuels. In
order to minimize the environmental impact of gasoline-only as a transportation fuel is to make
blends of gasoline with ethanol. Ethanol, a metabolite obtained through the fermentation of
sugars by the yeast Saccharomyces cerevisiae, can be blended with gasoline up to 25% (E25)
without the need to make any alteration to our existing car engines. The purpose of this research
is to obtain ethanol through the anaerobic fermentation by the S. cerevisiae using as primary
carbon and energy source the hydrolyzed sugars from the recycled paper with and without ink.
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