Table 5.
Parameters of periodical (static) fermentation of cellulose stillage, T = 37 °C.
| Retention Time (day) | pH | Dry Matter (DM) (g/L) | Dry Organic Matter (g/L DM) | VFA (mg/L) | Daily Biogas Volume (L/L) |
|---|---|---|---|---|---|
| 0 | 7.45 ± 0.02 | 92.0 ± 0.8 | 66.2 ± 0.6 | 850.0 ± 33,7 | - |
| 1 | 5.17 ± 0.08 | 85.9 ± 2.2 | 54.8 ± 0.1 | 1904.2 ± 58.1 | 3.73 ± 0.35 |
| 2 | 6.13 ± 0.12 | 79.8 ± 2.4 | 48.1 ± 0.3 | 960.8 ± 38.9 | 4.20 ± 0.42 |
| 3 | 6.52 ± 0.15 | 78.3 ± 1.7 | 46.5 ± 2.1 | 578.4 ± 29.9 | 1.20 ± 0.10 |
| 4 | 6.77 ± 0.09 | 73.5 ± 0.9 | 41.5 ± 0.8 | 520.1 ± 37.8 | 0.80 ± 0.07 |
| 5 | 6.85 ± 0.05 | 69.1 ± 1.1 | 37.0 ± 0.5 | 548.6 ± 41.8 | 0.33 ± 0.03 |
| 6 | 6.91 ± 0.06 | 67.8 ± 0.7 | 35.7 ± 0.9 | 556.9 ± 25.8 | 0.13 ± 0.04 |
| 7 | 6.83 ± 1.10 | 66.5 ± 2.5 | 34.2 ± 1.8 | 523.3 ± 32.7 | 0.13 ± 0.02 |
| 8 | 7.02 ± 0.08 | 66.5 ± 1.9 | 34.2 ± 1.8 | 580.2 ± 18.8 | 0.10 ± 0.01 |
Notes: Table shows mean values and standard deviations.