To date, global energy consumption has depended mainly on
non-renewable fossil fuels, which are a finite source associated
with pollution and global warming. To circumvent these issues,
biofuels are increasingly viewed as a viable solution (1). Since
commercial productions of bioethanol involve edible farm products
of corn and sugarcane, these operations have caused a new
problem of competing with availability of food supplies (2).
Therefore, the demand for ethanol productions from non-edible
biomass such as food waste or renewable biomass such as grasses
and woods has increased.