The results also suggested that improving the tolerance of C. acetobutylicum
strain
to NaCl or exploring new method for phase separation should be carried out in future work.
During ABE fermentation, acetic acid and butyric acid could be produced and re-assimilated,
while the total concentration of two acids at the end of fermentation with 61 g/L sugars was 1.42 times higher than that with 41 g/L sugars,
which might suggest that more acids were produced to generate ATP
for cell metabolism
when exposed
to inhibiting environment.