Kinetic Modeling and Enhanced Production of Fructose and Ethanol From Date Fruit Extract
Ethanol and fructose are important materials for the fuel and food markets; high fructose syrup production processes are still
costly. The effect of inoculum medium composition on the production of fructose and ethanol from dates by selective fermentation
was investigated. The addition of minerals improved the fructose content in the produced syrup and ethanol productivity. The
addition of malt extract to the medium increased fructose yield from 94% to 97%, but decreased ethanol yield from 78% to
69%. The presence of peptone increased ethanol productivity and fructose fraction in sugar, while iron increased fructose yield
to 100% in syrups with 371 g initial sugar=L. Compared to the commonly marketed 55% fructose, selective fermentation of date
extract produced sugar syrups with at least 82% fructose and significant amounts of ethanol. The excellent fit by the new expanded
model prediction to the experimental data makes them valuable tools for further process development or industrial applications.
