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Table 1 Effect of alkaline pretreatment on Miscanthus biomass.

From: Efficient hydrogen production from the lignocellulosic energy crop Miscanthus by the extreme thermophilic bacteria Caldicellulosiruptor saccharolyticus and Thermotoga neapolitana

Alkali

pH

Insoluble fraction

Lignin, % of insoluble fraction

  

% of initial dry matter

Acid-insoluble

Acid-soluble

None

-

100

21.9

0.8

Ca(OH)2

10.8

87

24.4

0.8

NaOH

11.5

64

12.9

0.6

  1. The pH of Miscanthus biomass after the addition of 0.10 g g-1 Ca(OH)2 or 0.09 g g-1 NaOH at the start of pretreatment at 85°C for 16 h, and the fraction recovered as insoluble material after pretreatment with the lignin content.