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Table 2 Comparison of ABE fermentations by C. acetobutylicum ATCC55025 without/with pervaporation

From: Evaluation of hydrophobic micro-zeolite-mixed matrix membrane and integrated with acetone–butanol–ethanol fermentation for enhanced butanol production

Fermentation parameters Batch fermentation Fed-batch fermentation with pervaporation
Initial glucose, g/L 80.0 ± 1.5 80.0 ± 1.1
Consumed glucose, g/L 70.5 ± 2.0 172.3 ± 1.6
Residual glucose, g/L 9.5 ± 0.5 10.0 ± 0.5
Maximum OD 3.90 5.50
Fermentation time, h 52 120
Acetone, g/L 6.0 ± 0.1 17.0 ± 0.6
Butanol, g/L 12.8 ± 0.9 34.5 ± 1.5
Ethanol, g/L 1.9 ± 0.2 3.4 ± 0.2
Total ABE, g/L 20.7 ± 1.2 54.9 ± 1.5
Butanol yield, g/g 0.18 ± 0.02 0.20 ± 0.01
ABE yield, g/g 0.29 ± 0.03 0.32 ± 0.01
Butanol productivity, g/L h 0.25 ± 0.02 0.29 ± 0.02
ABE productivity, g/L h 0.40 ± 0.02 0.46 ± 0.02
Acetic acid, g/L 3.6 ± 0.2 2.7 ± 0.1
Butyric acid, g/L 3.1 ± 0.2 3.2 ± 0.1
Total acids, g/L 6.7 ± 0.4 5.9 ± 0.2