Table 4 Comparison of batch ABE fermentations by C. acetobutylicum TSH1 and symbiotic system
C. acetobutylicum TSH1 with pretreatment | Symbiotic system without pretreatment | Symbiotic system with air sparging | |
|---|---|---|---|
Glucose consumed (g/L) | 49.5 ± 1.0 | 50.4 ± 1.8 | 58.6 ± 1.0 |
Acetone (g/L) | 4.9 ± 0.1 | 4.9 ± 0.1 | 3.1 ± 0.2 |
Butanol (g/L) | 11.1 ± 0.9 | 11.0 ± 0.5 | 11.2 ± 0.7 |
Ethanol (g/L) | 2.3 ± 0.04 | 2.2 ± 0.1 | 2.6 ± 0.07 |
Total ABE (g/L) | 18.3 ± 1.8 | 18.1 ± 1.2 | 16.9 ± 0.9 |
Butanol yield (g/g) | 0.22 ± 0.01 | 0.22 ± 0.01 | 0.18 ± 0.01 |
ABE yield (g/g) | 0.37 ± 0.01 | 0.36 ± 0.01 | 0.29 ± 0.01 |
Butanol productivity (g/L h) | 0.26 ± 0.01 | 0.21 ± 0.01 | 0.23 ± 0.01 |
ABE productivity (g/L h) | 0.44 ± 0.01 | 0.38 ± 0.01 | 0.37 ± 0.01 |