Table 2 Sweet sorghum bagasse recovered after distillation combined with alkaline pretreatment and main composition
Alkali | Alkali loading (mmol/g dry biomass) | Solid recovery (%) | Composition (%) | ||
|---|---|---|---|---|---|
Glucan | Xylan | Lignin | |||
Untreated | NA | NA | 30.33 ± 0.34 | 20.93 ± 0.23 | 20.46 ± 0.64 |
NaOH | 0.83 | 72.8 ± 1.3 | 41.22 ± 0.12 | 28.94 ± 0.78 | 15.93 ± 0.27 |
NaOH | 1.67 | 61.8 ± 2.4 | 48.62 ± 0.21 | 39.07 ± 0.56 | 13.62 ± 0.43 |
NaOH | 2.50 | 57.9 ± 1.7 | 51.31 ± 0.75 | 32.26 ± 0.37 | 11.21 ± 0.29 |
NaOH | 3.33 | 51.8 ± 3.9 | 57.25 ± 0.35 | 32.38 ± 0.74 | 8.21 ± 0.25 |
NaOH | 4.17 | 51.3 ± 3.3 | 57.69 ± 0.55 | 30.81 ± 0.63 | 7.34 ± 0.36 |
NaOH | 5.00 | 49.3 ± 2.2 | 60.04 ± 0.81 | 29.34 ± 0.39 | 7.27 ± 0.20 |
NaOH | 6.67 | 47.7 ± 0.9 | 61.63 ± 0.22 | 27.55 ± 0.49 | 7.86 ± 0.83 |
KOH | 0.83 | 71.5 ± 1.8 | 42.01 ± 0.33 | 26.34 ± 0.52 | 16.94 ± 0.31 |
KOH | 1.67 | 62.8 ± 3.1 | 47.84 ± 0.51 | 29.10 ± 0.16 | 13.23 ± 0.58 |
KOH | 2.50 | 60.7 ± 1.6 | 49.28 ± 0.73 | 29.28 ± 0.63 | 9.92 ± 0.56 |
KOH | 3.33 | 58.2 ± 1.2 | 51.07 ± 0.23 | 28.62 ± 0.04 | 8.01 ± 0.72 |
KOH | 4.17 | 51.9 ± 2.4 | 57.10 ± 0.95 | 30.02 ± 0.77 | 6.50 ± 0.25 |
KOH | 5.00 | 51.5 ± 0.7 | 57.55 ± 0.64 | 29.43 ± 0.19 | 7.02 ± 0.28 |
KOH | 6.67 | 50.5 ± 2.1 | 57.97 ± 0.63 | 26.97 ± 0.83 | 7.26 ± 0.46 |
Ca(OH)2 | 0.83 | 78.3 ± 1.2 | 38.33 ± 0.76 | 23.89 ± 0.36 | 16.72 ± 0.39 |
Ca(OH)2 | 1.67 | 81.7 ± 0.8 | 36.73 ± 0.42 | 23.18 ± 0.73 | 15.98 ± 0.32 |
Ca(OH)2 | 2.50 | 68.7 ± 1.3 | 43.59 ± 0.33 | 26.55 ± 0.53 | 13.64 ± 0.17 |
Ca(OH)2 | 3.33 | 69.2 ± 0.5 | 42.98 ± 0.08 | 26.85 ± 0.71 | 15.05 ± 0.31 |
Ca(OH)2 | 4.17 | 70.7 ± 2.1 | 41.95 ± 0.55 | 26.20 ± 0.81 | 14.52 ± 0.48 |
Ca(OH)2 | 5.00 | 71.3 ± 1.7 | 41.57 ± 0.18 | 25.82 ± 0.31 | 13.18 ± 0.17 |
Ca(OH)2 | 6.67 | 69.5 ± 1.4 | 42.14 ± 0.38 | 26.13 ± 0.75 | 13.51 ± 0.42 |