Biomedical Engineering Reference
In-Depth Information
Fig. 10 Co-fermentations of
glucose and xylose in
simulated medium (a) and
wheat straw hydrolysate
(b) by the recombinant
S. cerevisiae 424A(LNH-ST)
lignocellulosic biomass. Process integration aims to optimize these units on the
system level, and thus improve the techno-economic performance of the system,
making bioethanol economically competitive with petroleum-based fuels.
Unlike ethanol production from sugar- and starch-based feedstocks that can be
carried out at HG conditions with more than 10% ethanol achieved, ethanol
concentration that can be achieved with lignocellulosic biomass is much lower due
to the problematic characteristics of the feedstock, and a larger quantity of water
needs to be introduced into the system via feedstock, steam and addition of
chemicals, which inevitably reduces the efficiency of the facility and enhances the
energy consumption of ethanol distillation and distillage treatment. Therefore, the
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