Fermentation parameters | Sodium butyric (mM) | Sodium acetic (mM) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Control | 20 | 40 | 50 | 60 | 70 | 20 | 40 | 50 | 60 | 70 | |
Acetone (g/L) | 0.93 | 1.18 | 1.91 | 2.32 | 2.83 | 2.76 | 2.03 | 2.41 | 2.61 | 2.53 | 2.59 |
Isopropanol (g/L) | 0.55 | 0.86 | 1.23 | 1.66 | 1.78 | 1.75 | 1.93 | 2.04 | 2.12 | 1.98 | 2.06 |
Butanol (g/L) | 5.14 | 6.78 | 8.95 | 10.35 | 11.07 | 11.03 | 5.98 | 8.23 | 10.71 | 10.68 | 9.70 |
Acetate (g/L) | 0.21 | 0.22 | 0.18 | 0.21 | 0.18 | 0.25 | 0.78 | 0.98 | 1.15 | 1.02 | 1.98 |
Butyrate (g/L) | 0.41 | 1.12 | 2.06 | 2.12 | 2.15 | 3.56 | 0.35 | 0.37 | 0.21 | 0.31 | 0.21 |
AIB productivity (g/L/h) | 0.14a | 0.18a | 0.34b | 0.40b | 0.44b | 0.43b | 0.21a | 0.26b | 0.40b | 0.42b | 0.40b |
Glucose consumption (g/L) | 20.18 | 25.94 | 35.56 | 39.81 | 42.35 | 42.03 | 30.12 | 39.29 | 42.89 | 42.19 | 41.07 |
AIB yield (g/g) | 0.33 | 0.34 | 0.34 | 0.36 | 0.37 | 0.37 | 0.33 | 0.34 | 0.36 | 0.36 | 0.35 |
pHc | 4.5 | 4.7 | 5.0 | 5.4 | 5.6 | 5.7 | 4.6 | 5.1 | 5.4 | 5.6 | 5.7 |
Final pH | 5.3 | 5.6 | 5.8 | 6.0 | 6.1 | 6.1 | 5.3 | 5.5 | 5.9 | 6.1 | 6.2 |
ADHd (U/mg) | 0.26 | 0.31 | 0.39 | 0.45 | 0.51 | 0.51 | 0.27 | 0.37 | 0.49 | 0.48 | 0.47 |