Screw configuration profiles used to achieve 7% (a) and 80% (b) xylose removal. Convening element: C1: GFA-2-30-30, C2: GFA-2-30-90, C3: GFA-2-40-60, C4: GFA-2-40-90. Kneading elements: K1: KB2-15-30°, K2: KB2-15-60°, K3: KB2-15-90°, K4: KB2-15-30°-Li. GFA-2-XX-XX: G = co-rotating, F = conveying, A = free-meshing, 2 = number of threads, the first XX = pitch, the second XX = length of screw element. KB5-2-30-XX-Li: KB = kneading block, 5 = number of kneading segments, 2 = number of threads, 30 = length of kneading block, XX = twisting angle of the individual kneading segments, RE = conveying element, Li = reverse element, X2 = two same elements.