Table 3 Effects of presoaked WWS and raw WWS on autohydrolysis
Sample | Soaking reagent | Concentration (mmol/L) | Composition (%) | Recovery (%) | Removal (%) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
Glucan | Xylan | Lignin | Acetyl | Solid | Glucan | Xylan | Lignin | |||
Raw WWS | No soaking | – | 43.7 ± 0.2 | 8.4 ± 0.6 | 24.5 ± 0.1 | 0.7 ± 0.1 | 60.9 ± 0.4 | 94.3 ± 0.5 | 61.7 ± 0.2 | 16.5 ± 0.2 |
H2O | – | 48.9 ± 0.3 | 7.6 ± 0.1 | 24.4 ± 0.2 | 0.4 ± 0.0 | 59.4 ± 0.3 | 96.7 ± 1.7 | 66.8 ± 0.2 | 19.8 ± 0.3 | |
H+ | 30 | 48.2 ± 0.5 | 7.6 ± 0.2 | 24.2 ± 0.4 | 0.3 ± 0.1 | 56.1 ± 0.6 | 95.8 ± 1.4 | 69.3 ± 0.6 | 21.6 ± 0.3 | |
K+ | 30 | 46.7 ± 0.3 | 7.3 ± 0.5 | 24.0 ± 0.2 | 0.4 ± 0.1 | 57.2 ± 1.1 | 94.7 ± 0.6 | 68.5 ± 0.5 | 20.1 ± 0.5 | |
Na+ | 30 | 49.1 ± 0.4 | 8.9 ± 0.2 | 24.3 ± 0.6 | 0.4 ± 0.2 | 56.8 ± 0.5 | 98.7 ± 1.1 | 62.2 ± 0.3 | 22.7 ± 0.2 | |
Ca2+ | 30 | 48.1 ± 0.2 | 7.8 ± 0.6 | 22.5 ± 0.1 | 0.4 ± 0.0 | 57.4 ± 0.8 | 97.7 ± 1.4 | 66.6 ± 0.3 | 21.6 ± 0.1 | |
Mg2+ | 30 | 46.5 ± 0.3 | 7.1 ± 0.7 | 25.5 ± 0.2 | 0.3 ± 0.1 | 58.3 ± 0.3 | 96.2 ± 0.7 | 69.1 ± 0.1 | 23.4 ± 0.4 | |
Zn2+ | 30 | 50.5 ± 0.3 | 5.4 ± 0.5 | 26.5 ± 0.1 | 0.2 ± 0.1 | 50.3 ± 0.9 | 90.1 ± 1.3 | 79.7 ± 0.2 | 25.3 ± 0.6 | |
Fe2+ | 30 | 53.4 ± 0.6 | 4.8 ± 0.3 | 27.1 ± 0.3 | 0.2 ± 0.0 | 49.4 ± 0.4 | 94.2 ± 0.4 | 81.9 ± 0.4 | 27.6 ± 0.3 | |
Fe2+ | 10 | 54.7 ± 0.7 | 4.3 ± 0.1 | 25.4 ± 0.2 | 0.3 ± 0.0 | 49.4 ± 0.6 | 93.2 ± 0.8 | 80.2 ± 0.5 | 24.9 ± 0.1 | |
20 | 53.7 ± 0.2 | 4.4 ± 0.5 | 26.5 ± 0.3 | 0.2 ± 0.1 | 50.9 ± 0.4 | 96.8 ± 1.1 | 81.5 ± 0.2 | 26.3 ± 0.4 | ||
30 | 53.6 ± 0.1 | 4.9 ± 0.5 | 27.2 ± 0.1 | 0.2 ± 0.1 | 49.7 ± 0.7 | 94.9 ± 0.9 | 82.7 ± 0.4 | 27.4 ± 0.5 | ||
60 | 54.1 ± 0.5 | 4.7 ± 0.2 | 26.4 ± 0.6 | 0.1 ± 0.2 | 47.4 ± 0.4 | 93.9 ± 1.5 | 83.1 ± 0.8 | 29.8 ± 0.3 | ||
120 | 54.0 ± 0.4 | 4.6 ± 0.4 | 27.1 ± 0.4 | 0.0 ± 0.0 | 45.9 ± 0.3 | 87.8 ± 2.2 | 84.7 ± 0.7 | 30.2 ± 0.3 | ||