Skip to main content

Advertisement

Table 1 Chemical composition of sugarcane bagasse before and after alkaline-sulfite pretreatment, and glucurono-arabinoxylans (GAX) extracted from the pretreated material

From: Xylan extraction from pretreated sugarcane bagasse using alkaline and enzymatic approaches

Components (g/100 g of sample on dry basis) Untreated bagasse Unwashed pretreated bagasse Alkaline-extracted GAX (Hoije method) Alkaline-extracted GAX (Lopez method) Enzymatically extracted GAX
Total lignin 21.1 ± 0.4 13.6 ± 0.2 8.4 ± 0.1 10.2 ± 0.2 < 4
Glucan 40.4 ± 0.2 45.2 ± 0.3 5.23 ± 0.1 4.4 ± 0.1 2.2 ± 0.1
Xylan 22.4 ± 0.3 23.2 ± 0.3 61.7 ± 0.8 64.2 ± 0.2 72.5 ± 0.1
Arabinosyl groups 2.6 ± 0.1 2.8 ± 0.1 7.7 ± 0.1 6.8 ± 0.1 11.5 ± 0.8
Uronic acid groups 2.5 ± 0.2 2.4 ± 0.4 6.5 ± 0.1 5.7 ± 0.1 13.3 ± 0.8
Acetyl groups 3.3 ± 0.9 0.2 ± 0.0 nd nd nd
Extractives 4.5 ± 0.5 5.4 ± 0.1 na na na
  1. na not analyzed, nd not detected