Evaluating Lignin-Rich Residues from Biochemical Ethanol Production of Wheat Straw and Olive Tree Pruning by FTIR and 2D-NMR

Table 1

Composition of WIS fractions and lignin-rich residues.

WIS			Lignin-rich residue
Composition (% dry weight)	Wheat straw	Olive tree pruning	Composition (% dry weight)	Wheat straw	Olive tree pruning
Cellulose	49.7	39.2	Glucose	13.8	7.1
Hemicelluloses	14.8	1.6	Xylose	0.9	0.0
Lignin	23.5	48.0	Galactose	0.1	0.1
			Arabinose	0.0	0.6
			Mannose	1.0	0.0
			Lignin	69.3	77.0

Enzymatic hydrolysis yields of 75% and 50% for wheat straw and olive tree pruning, respectively.