The effect of pretreatments on the composition of the hazelnut tree pruning residue (HTPR) and on the digestibility of the cellulose was investigated. The liquid hot water (LHW) and the very dilute acid (VDA) treatments were effective in solubilizing hemicellulose. The cellulose conversion increased up to around 60% (corresponding to 32-36 g/L glucose) with decreasing hemicellulose concentration in the pretreated HTPR. The alkali treatment provided partial delignification, however, the glucose production was comparably lower. Combining the hemicellulose removal and the delignification effect of different pretreatments in two-stage processes (LHW-alkali and VDA-alkali treatments) enhanced the cellulose concentration in the solids, but not the amount of glucose released in the enzymatic digestion. These results suggested that the hemicellulose was the main barrier against the conversion of cellulose in the LHW and VDA treated HTPR and the glucose in the hydrolysis medium inhibited the cellulase activity, which prevented the complete conversion of cellulose.

研究了预处理对榛树修剪残留物（HTPR）组成和纤维素消化率的影响。液态热水（LHW）和极稀酸（VDA）处理可有效溶解半纤维素。随着预处理HTPR中半纤维素浓度的降低，纤维素转化率提高了约60％（相当于32-36 g / L葡萄糖）。碱处理提供了部分脱木质素，但是，葡萄糖的产量相对较低。在两个阶段的过程（LHW-碱和VDA-碱处理）中结合半纤维素的去除和不同预处理的去木质素作用，可以提高固体中的纤维素浓度，但不能增加酶消化过程中释放的葡萄糖量。