Table 3.
Fermentation efficiency of B. succiniciproducens and A. succinogenes batch cultures carried out at three initial concentrations of commercial carbon sources and OFMSW hydrolysate
| Initial and consumed carbon sources (g/L)a | Medium | Succinic acid (g/L) | Yield (g/g)a | Productivity (g/L/h) | By-product: succinic acid (g/g) |
|---|---|---|---|---|---|
| Basfia succiniciproducens | |||||
| 30 (27.8) | Commercial | 12.5 | 0.45 | 0.44 | 1.19 |
| 30 (31.3) | OFMSW | 14.4 | 0.46 | 0.64 | 0.90 |
| 50 (51.7) | Commercial | 26.9 | 0.52 | 0.45 | 0.66 |
| 50 (50.6) | OFMSW | 26.8 | 0.53 | 0.85 | 0.88 |
| 80 (81.1) | Commercial | 35.7 | 0.44 | 0.46 | 0.56 |
| 80 (78.9) | OFMSW | 37.1 | 0.47 | 0.56 | 0.68 |
| Actinobacillus succinogenes | |||||
| 30 (30.8) | Commercial | 15.4 | 0.5 | 0.6 | 0.71 |
| 30 (30.2) | OFMSW | 15.7 | 0.52 | 0.52 | 0.71 |
| 50 (47.1) | Commercial | 27.3 | 0.58 | 0.49 | 0.20 |
| 50 (52.7) | OFMSW | 29.4 | 0.56 | 0.89 | 0.31 |
| 80 (78.2) | Commercial | 37.9 | 0.54 | 0.45 | 0.21 |
| 80 (77.3) | OFMSW | 37.9 | 0.5 | 0.57 | 0.31 |
aThe initial total carbon source concentration is ± 5% of the indicated value, while the consumed carbon source is presented in the brackets; succinic acid to sugars conversion yield has been calculated based on the quantity (g) of succinic acid produced during fermentation and the quantity (g) of total sugars added in the bioreactor