Bridging the gap between feedstock growers and users: the study of a coppice poplar-based biorefinery

Table 2 Composition and sugar recovery resulting from steam pretreated of coppice samples including WIF yield (expressed as recovered solids in kg/tonne), chemical composition of WIF (as percentages of the solid weight), and monomeric sugar yields in WSF samples (expressed as kg/tonne raw biomass)

Site	Hybrid	WIF yield (kg/tonne)	Chemical composition of WIF (%)					Sugar recovered in WSF (kg/tonne)
Site	Hybrid	WIF yield (kg/tonne)	Glucan	Xylan	Minor sugars	Total sugars	Lignin	Glucose	Xylose	Minor sugars	Total sugars
Jefferson	Low-productivity	468.5	52.2	2.4	0.7	55.2	37.4	49.4	78.2	28.7	156.3
	Low-productivity	21.6	0.3	0.3	0.1	0.1	0.1	1.5	4.0	1.1	6.3
	High-productivity	467.4	53.0	2.8	0.7	56.5	35.9	27.2	65.7	20.5	113.3
	High-productivity	5.6	1.0	0.1	0.0	0.9	0.4	0.4	2.1	1.0	2.6
Clarksburg	Low-productivity	508.5	55.3	2.6	0.7	58.7	37.6	62.2	80.4	30.4	173.0
	Low-productivity	9.3	0.6	0.1	0.0	0.5	0.5	2.6	3.9	0.4	6.1
	High-productivity	529.0	54.4	2.6	0.7	57.7	36.8	53.4	72.0	27.1	152.4
	High-productivity	6.4	0.4	0.2	0.0	0.2	0.7	4.0	4.6	2.5	11.1

Standard deviations (SDs) are shown under each mean value. kg/tonne values refer to kg of sugar recovered per tonne of raw OD biomass