Table 3.
Effect of C/N ratio on butanol production in batch culture of C. acetobutylicum YM1.
| C:N ratio | Growth DCW (g/L) | Residual glucose (g/L) | Final pH | Solvent production (g/L) |
Acid production (g/L) |
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| Acetone | Butanol | Ethanol | ABE | Acetic | Butyric | T. Acids | ||||
| 5.00 | 1.65 | 10.36 | 5.20 | 2.21 | 5.20 | 0.67 | 8.09 | 2.70 | 0.38 | 3.08 |
| 10.00 | 1.39 | 3.79 | 5.27 | 3.27 | 9.05 | 1.65 | 13.98 | 1.23 | 0.22 | 1.45 |
| 12.80 | 1.34 | 6.24 | 5.15 | 2.61 | 9.21 | 1.70 | 13.52 | 0.86 | 0.02 | 0.87 |
| 25.00 | 1.20 | 8.82 | 6.67 | 1.59 | 7.38 | 0.90 | 9.88 | 0.92 | 0.46 | 1.38 |
| 30.00 | 1.17 | 14.36 | 4.51 | 1.40 | 6.84 | 0.73 | 8.98 | 1.00 | 0.65 | 1.65 |
| 45.00 | 1.12 | 14.21 | 4.38 | 1.31 | 6.24 | 0.63 | 8.18 | 0.93 | 0.69 | 1.62 |
| 65.00 | 1.07 | 18.30 | 4.20 | 1.32 | 6.61 | 0.65 | 8.59 | 0.86 | 0.67 | 1.52 |
| 75.00 | 1.05 | 16.15 | 4.12 | 1.25 | 6.08 | 0.57 | 7.91 | 0.76 | 0.67 | 1.44 |
| 90.00 | 1.06 | 17.12 | 4.11 | 1.24 | 6.01 | 0.56 | 7.81 | 0.75 | 0.63 | 1.38 |
| 120.00 | 1.06 | 17.91 | 4.08 | 1.17 | 5.55 | 0.51 | 7.23 | 0.68 | 0.60 | 1.28 |