Table 3
Hydrogen and bioethanol production. Efficacy and efficiency values at the end of
fermentation.
NPah UP BP PCa
Hydrogen (NL/L) 0.54 ± 0.30 0.81 ± 0.32 1.98 ± 0.61 1.09 ± 0.15
Ethanol (g/L) 2.67 ± 0.28 5.36 ± 1.23 9.01 ± 0.51 4.65 ± 0.30
h (%) 8.11 ± 0.68 14.62 ± 2.31 18.72 ± 0.94 13.87 ± 1.17
x (') 1.00 ± 0.00 1.84 ± 0.44 2.33 ± 0.31 1.73 ± 0.28
Non pretreated test after the hydrolysis stage (NPah), ultrasonic pretreatment (UP), a
basic pretreatment (BP) and a calcium carbonate pretreatment (PCa).