Charles Nichola, Mansfield Shawn D, Mirochnik Olga, Duff Sheldon J B
Department of Chemical and Biological Engineering, University of British Columbia, 2216 Main Mall, Vancouver, BC V6T 1Z4, Canada.
Biotechnol Prog. 2003 Sep-Oct;19(5):1606-11. doi: 10.1021/bp030020f.
Enhanced oxygen delignification of softwood pulp samples (taken upstream and downstream of a commercial oxygen delignification unit) improved the initial rate of enzymatic saccharification and overall yield of monomeric sugars by 62-82% and 76-80%, respectively. Laboratory-scale experiments were used to examine the effect of a broad range of operating parameters (temperature, time, caustic concentration, and oxygen partial pressure) on the effectiveness of oxygen delignification. Using empirical models, kappa number (residual lignin content) was found to effectively predict final conversion to monomeric sugars. Application of oxygen delignification to sulfite mill knots resulted in smaller (20-25%) reduction in lignin content. However, using a combination of oxygen delignification and particle size reduction, up to 80% of the carbohydrate in the reject knots could be converted to fermentable sugars.
对针叶木浆样品（取自商业氧脱木素装置的上游和下游）进行强化氧脱木素处理，分别使酶促糖化的初始速率和单体糖的总产率提高了62% - 82%和76% - 80%。采用实验室规模的实验来考察一系列操作参数（温度、时间、碱浓度和氧分压）对氧脱木素效果的影响。通过经验模型发现，卡伯值（残余木素含量）能够有效预测最终转化为单体糖的程度。将氧脱木素应用于亚硫酸盐制浆的节子，木质素含量的降低幅度较小（20% - 25%）。然而，采用氧脱木素与减小颗粒尺寸相结合的方法，可使废弃节子中高达80%的碳水化合物转化为可发酵糖。
