Table 2.
Effect of nitrogen sources on butanol production and growth of YM1 isolate using TYA medium.
| Nitrogen source (g/L) |
Growth (OD at 600 nm) | Residual glucose (g/L) | Final pH | Solvents (g/L) |
|||||
|---|---|---|---|---|---|---|---|---|---|
| Tryptone | Yeast extract | Acetate salt (3 g/L) | Acetone | Butanol | Ethanol | ABE | |||
| 6 | 2 | Ammonium | 1.369 | 0.03 | 4.89 | 1.22 | 4.35 | 0.06 | 5.62 |
| 8 | 0 | Ammonium | 1.417 | 0.06 | 4.90 | 1.48 | 4.21 | 0.06 | 5.75 |
| 0 | 8 | Ammonium | 1.494 | 1.94 | 4.70 | 0.74 | 2.60 | 0.03 | 3.37 |
| 6 | 2 | Sodium | 1.437 | 0.24 | 4.70 | 1.04 | 3.47 | 0.04 | 4.55 |
| 4 | 4 | Ammonium | 1.652 | 0.09 | 4.81 | 1.06 | 3.55 | 0.04 | 4.66 |
| 2 | 6 | Ammonium | 1.520 | 3.61 | 4.66 | 0.64 | 2.61 | 0.03 | 3.28 |