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Table 1 Composition of structural carbohydrates and lignin in the water-insoluble fractions of the pretreated materials and sugar compositions and prevalence of inhibitory compounds in hydrolyzate liquors

From: Prefermentation improves ethanol yield in separate hydrolysis and cofermentation of steam-pretreated wheat straw

  Severe wheat straw slurry Mild wheat straw slurry
Steam-pretreated material (% of dry weight)
 Glucan 51.4 50.7
 Xylan 1.7 1.0
 Galactan 0.0 BDL
 Arabinan 0.1 0.05
 Mannan 0.1 0.07
 Acid-soluble lignin 0.7 0.6
 Acid-insoluble lignin 33.8 29.8
 Lignin ash 6.9 10.2
 Total determined 94.6 92.4
Hydrolyzate liquor (g·L−1)
 Glucose 14.5 8.7
 Xylose 32.6 35.4
 Galactose BDL 0.9
 Arabinose 3.5 1.8
 Mannose 1.8 0.7
 Formic acid 1.6 0.8
 Acetic acid 8.5 5.6
 Levulinic acid BDL 0.5
 HMF 1.3 0.3
 Furfural 7.7 3.7
  1. BDL below detection limit