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Table 2 Sweet sorghum bagasse recovered after distillation combined with alkaline pretreatment and main composition

From: A novel cost-effective technology to convert sucrose and homocelluloses in sweet sorghum stalks into ethanol

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
  1. NaOH, sodium hydroxide; KOH, potassium hydroxide; Ca(OH)2, calcium hydroxide; NA, not applicable. All the data are shown as mean ± SD.
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