Techno-economic evaluation of integrated first- and second-generation ethanol production from grain and straw

Table 3 Raw material composition obtained from experiments and the compositions used in Aspen Plus

	Straw (% of DM)	Straw comp. used in Aspen Plus (% of DM)	WBG comp. used in Aspen Plus (% of DM)
Glucan^a	42.3	42.2	6.8
Starch	0.0	0.0	76.0
Xylan	27.4	26.7	4.9
Arabinan	3.6	3.1	0.0
Lignin	19.3^b	15.5	0.5
Ash	1.4	0.16	1.6
Acetate	n.a.^c	1.5	0.0
Extractives	n.a.	10.2^d	0.0
Protein	n.a.	0.7	7.9
Fat	n.a.	0.0	2.3

^aCellulose as glucan. ^b of which acid-soluble lignin was 1.1 wt%, ^c not analyzed, ^d of which 5 wt% was non-volatile and 5.2 wt% semi-volatile

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