Table 1.
Composition analyses of the inoculum as well as the untreated versus pretreated feedstocks.
| Samples | Pretreatment | TS content (%) | VS content (%) | Total lignin∗ (%) | Hemicellulose (%) | Cellulose (%) |
|---|---|---|---|---|---|---|
| Inoculum | — | 5.7 | 2.7 | ND | ND | ND |
| Centrifuged | 11.7 | 5.3 | ND | ND | ND | |
|
| ||||||
| Elmwood | Untreated | 95.5 | 94.5 | 26.2 | 26.3 | 46.4 |
| 150°C, 0.5 h | 95.5 | 94.1 | 25.1 | 23.4 | 50.0 | |
| 150°C, 1 h | 95.5 | 93.8 | 23.4 | 21.5 | 53.3 | |
| 180°C, 0.5 h | 96.3 | 94.4 | 20.4 | 21.9 | 55.7 | |
| 180°C, 1 h | 94.9 | 93.6 | 19.1 | 21.3 | 58.1 | |
|
| ||||||
| Pinewood | Untreated | 95.1 | 95.2 | 26.8 | 28.0 | 44.5 |
| 150°C, 0.5 h | 95.3 | 94.6 | 27.8 | 20.2 | 51.3 | |
| 150°C, 1 h | 95.9 | 95.1 | 26.5 | 21.3 | 51.4 | |
| 180°C, 0.5 h | 96.5 | 95.5 | 22.1 | 18.5 | 58.4 | |
| 180°C, 1 h | 96.9 | 95.8 | 21.1 | 16.9 | 60.8 | |
|
| ||||||
| Rice straw | Untreated | 95.4 | 83.9 | 17.1 | 50.1 | 21.5 |
| 150°C, 0.5 h | 95.6 | 83.8 | 12.2 | 45.6 | 29.9 | |
| 150°C, 1 h | 95.7 | 83.6 | 13.4 | 45.3 | 28.7 | |
| 180°C, 0.5 h | 95.9 | 86.2 | 11.4 | 42.3 | 36.2 | |
| 180°C, 1 h | 96.0 | 84.7 | 10.6 | 42.2 | 35.3 | |
ND = not determined.
∗Sum of acid soluble lignin (ASL) and acid insoluble lignin (AIL) contents.