TABLE 1.
Final fermentation values
| Culturea | Fermentation time (h)b | Cell dry wt (g liter−1) | Sugar fermentation rate (g liter−1 day−1) | Ethanol concn (%, vol/vol) | Glycerol concn (g liter−1) | Succinic acid concn (g liter−1) | Acetic acid concn (g liter−1) |
|---|---|---|---|---|---|---|---|
| Normal (300 mg of N liter−1) | 170 ± 12 | 5.8 ± 0.1 | 33.5 ± 2.6 | 12.7 ± 0.9 | 7.8 ± 0.6 | 1.8 ± 0.2 | 1.0 ± 0.1 |
| Sluggish (50 mg of N liter−1) | 700 ± 10 | 1.5 ± 0.1 | 7.6 ± 0.3 | 9.5 ± 0.4 | 7.2 ± 0.3 | 1.0 ± 0.1 | 1.0 ± 0.1 |
| Concentrated twofold | 330 | 3.2 | 17.1 | 13.4 | 8.1 | 1.4 | 0.6 |
| Concentrated fivefold | 120 | 8.0 | 47.7 | 11.2 | 9.4 | 1.4 | 0.8 |
a
Data for the normal and sluggish fermentations were obtained from three independent experiments. Musts for the concentration experiments were obtained from a single sluggish fermentation.
b
Time for 93% of the sugar consumption for sluggish fermentations.