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Table 2 Composition of the pretreated material after the first and second acid hydrolysis steps, expressed as % of dry matter

From: The influence of solid/liquid separation techniques on the sugar yield in two-step dilute acid hydrolysis of softwood followed by enzymatic hydrolysis

Pretreatment1 Glucan Xylan Galactan Arabinan Mannan Lignin (acid-soluble) Lignin (insoluble)
First step, +W 52.7 2.1 1.0 0.7 2.0 0.3 37.8
First step, -W 58.7 0.0 1.9 0.0 1.5 0.7 38.3
Second step, P+W 56.6 0.0 0.9 0.7 1.6 0.3 40.9
Second step, F+W 57.8 0.0 0.9 0.8 1.5 0.3 39.8
Second step, P-W 54.8 0.0 1.8 0.0 1.3 0.6 42.5
Second step, F-W 53.9 0.0 1.6 0.0 1.3 0.6 43.8
  1. 1 Experimental designs: with washing (+W) and without washing (-W) of pressed (P) and vacuum-filtered (F) material.