Table 2 ABE production in single-stage and three-stage continuous fermentations
Parameters | Single-stage continuous fermentation | Three-stage continuous fermentation |
|---|---|---|
Dilution rate (h−1) | 0.2 | 0.2 |
Initial starch (g/L) | 54.2 | 55.6 |
Residue starch (g/L) | 23.7 | 3.6 |
Residue glucose (g/L) | 4.7 | 4.8 |
Butanol (g/L) | 6.3 | 11.2 |
ABE (g/L) | 9.3 | 16.8 |
Butanol yield (g/g) | 0.24 | 0.24 |
Butanol productivity (g/L/h) | 1.26 | 0.75 |
ABE productivity (g/L/h) | 1.86 | 1.12 |
Substrate utilization rate (%) | 48.5 | 85.8 |