Table 2 Composition of the 6 different steam-pretreated lucerne samples
Pretreated material | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
DM (%) | 15.7 | 13.4 | 12.9 | 12.9 | 14.1 | 15.0 |
WIS (%) | 9.5 | 7.8 | 7.3 | 6.9 | 8.6 | 8.7 |
Composition of the WIS (in % of WIS) | ||||||
 Glucan | 41.5 | 41.2 | 41.3 | 40.7 | 42.9 | 40.4 |
 Xylan | 7.4 | 6.9 | 6.5 | 6.3 | 7.3 | 5.9 |
 Galactan | 2.0 | 2.0 | 2.6 | 2.9 | 1.5 | 1.5 |
 Arabinan | 1.8 | 1.6 | 1.7 | 1.8 | 1.9 | 1.7 |
 AIL | 36.4 | 40.2 | 36.0 | 37.2 | 35.5 | 37.3 |
 ASL | 1.5 | 1.7 | 1.5 | 1.4 | 1.4 | 1.4 |
 Ash | 1.2 | 0.5 | 1.2 | 1.2 | 0.7 | 2.1 |
 Total (%) | 91.8 | 94.1 | 90.7 | 91.5 | 91.3 | 90.3 |
Composition of the liquid fraction (in g/L) | ||||||
 Glucose* | 0.8 | 0.6 | 0.6 | 0.8 | 0.8 | 0.9 |
 Xylose* | 7.8 | 6.9 | 7.2 | 7.5 | 7.2 | 8.2 |
 Galactose* | 2.4 | 1.5 | 1.6 | 2.5 | 2.4 | 2.0 |
 Arabinose* | 2.0 | 1.3 | 1.5 | 1.9 | 1.8 | 1.7 |
 Lactic acid | 7.3 | 7.1 | 6.8 | 7.0 | 6.7 | 7.7 |
 Acetic acid | 7.9 | 7.6 | 7.3 | 10.3 | 9.7 | 11.6 |