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Table 1 Chemical composition of different birch samples

From: Microbial biogas production from hydrolysis lignin: insight into lignin structural changes

Birch Composition (%)
Glucanb Arabinan Galactan Xylan Mannan Klason lignin
Untreated 36.5 ± 2.04 1.1 ± 0.02 1.4 ± 0.04 16.5 ± 0.42 2.8 ± 0.12 29.2 ± 1.12
Steam-explodeda 43.2 ± 2.06 0.3 ± 0.01 0.9 ± 0.04 9.9 ± 0.08 1.7 ± 0.02 40.3 ± 1.02
HL 9.7 ± 1.01   0.1 ± 0.01 1 ± 0.02 0.6 ± 0.01 79.8 ± 3.27
  1. The amounts of all components are expressed as a percentage of dry matter. The amount of carbohydrates was calculated using the mass of anhydrous sugar
  2. aThe SE material was not washed and represents the whole slurry obtained after the pretreatment
  3. bIt should be noted that while almost all of the glucan originate from cellulose, hemicelluloses also contain some glucose that will contribute to the glucan fraction