Table 1 Chemical compositions of the as harvested and screening upgraded (FS-10) Douglas-fir forest residue
| Untreated forest residue | Bark (%) | Glucan (%) | Xylan (%) | Mannan (%) | K Lignin (%) | G + X + M a (%) |
|---|---|---|---|---|---|---|
| As harvested | 5.9 | 38.4 | 4.4 | 7.5 | 30.5 | 50.3 |
| Screening upgraded (FS-10) | 4.7 | 41.0 | 5.7 | 9.7 | 29.3 | 56.4 |