Table 1 Chemical composition of washed pretreated solids prior to enzymatic saccharification at 12.5% WIS with varied enzyme preparation loadings and after 72 h reactions with air or N2a,b
Constituent | PS | PS-Air | PS-N2 | ||||
|---|---|---|---|---|---|---|---|
6% | 9% | 12% | 6% | 9% | 12% | ||
Glucan | 48.3 (1.9) | 31.9 (0.3) | 26.6 (0.4) | 26.9 (0.3) | 41.0 (0.1) | 39.2 (0.2) | 36.8 (0.1) |
Xylan | ≤ 0.1 | ≤ 0.1 | ≤ 0.1 | ≤ 0.1 | ≤ 0.1 | ≤ 0.1 | ≤ 0.1 |
Mannan | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 |
Arabinan | ND | ND | ND | ND | ND | ND | ND |
Galactan | ND | ND | ND | ND | ND | ND | ND |
Klason lignin | 42.1 (2.2) | 54.2 (3.0) | 56.4 (2.2) | 55.4 (0.7) | 46.3 (4.0) | 46.7 (1.5) | 49.6 (2.3) |
ASL | 6.6 (0.4) | 5.8 (0.3) | 5.9 (0.3) | 6.1 (0.5) | 5.7 (0.2) | 5.8 (0.1) | 5.4 (0.4) |