Ethanol production from mixtures of wheat straw and wheat meal

Table 3 Composition of WIS and liquid (prehydrolysate) fractions in steam-pretreated wheat straw slurry.

Steam-pretreated wheat straw
WIS		Prehydrolysate
Components	Percentage of DM	Components	Oligosaccharides	Monosaccharides
Glucan	67.6 ± 0.5	Sugars, g/L
Mannan	BDL	Glucose	0.9 ± 0.1	2.3
Xylan	0.7 ± 0.0	Mannose	4.1 ± 0.1	1.1
Galactan	BDL	Xylose	2.9 ± 0.7	22.0
Arabinan	0.4 ± 0.0	Galactose	BDL	1.4
ASL^a	5.1 ± 0.2	Arabinose	BDL	2.9
AIL^b	23.1 ± 0.2	Inhibitors, g/L
Total ash	1.0 ± 0.1	Acetic acid	1.7
AIA^c	0.4 ± 0.2	HMF	0.4
		Furfural	1.5
		Total ash, % of prehydrated material	0.3 ± 0.2

All the sugars in the prehydrolysate are reported as monomer sugars. Where standard deviations are presented, it was calculated from duplicate measurements on the same sample.
^aAcid-soluble lignin.
^bAcid-insoluble lignin.
^cAcid-insoluble ash.
BDL = below detection limit; DM = dry matter; WIS = water-insoluble solids.

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