Xylose
utilization was
observed
when glucose and arabinose
were
exhausted
at 42 h
and cells cultured
in 500 ml glass fermentor
grew
to the highest cell density (OD600) of 7.65.
The cells produced 14.26 g/L
ABE solvents,
including 4.1 g/L acetone, 9.3 g/L butanol and 0.86 g/L ethanol.
The solvent productivity and yield reached 0.24 g/(L h) and 0.35 g/g.
The solvent concentration and yield was similar to batch fermentation using pure glucose as carbon source,
while the solvent productivity decrease 18%.
All supplied sugars were exhausted after 60 h fermentation,
suggesting that the hydrolysate with 41 g/L total sugars could be potential carbon resource for butanol fermentation.