Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Forestry Genetics & Biotechnology (Nanjing Forestry University), Ministry of Education, Nanjing 210037, China.
Bioresour Technol. 2022 Jun;354:127190. doi: 10.1016/j.biortech.2022.127190. Epub 2022 Apr 19.
Organic acid hydrolysis is a potential method for xylooligosaccharides (XOS) production from lignocelluloses. However, the effect of lignin content on XOS production using organic acid hydrolysis remains unclear. In this work, the effect of delignification on XOS production from poplar by acetic acid (AC) hydrolysis was investigated. Hydrogen peroxide-acetic acid (HPAC) pretreatment catalyzed by 0-200 mM HSO (HPAC0-HPAC200) removed 21.6-86.5% of lignin in poplar. HPAC pretreatment increased the xylan accessibility to AC solution, thus increasing the xylan removal during AC hydrolysis. An appropriate delignification (61.7%) resulted in the highest XOS yield of 37.4% by AC hydrolysis, increased by 29.9% compared to the optimal XOS yield (28.8%) from raw poplar. After alkaline post-incubation, the glucose yield of poplar residue rose from 57.1% to 78.6%. This work developed a delignification process to efficiently improve XOS and monosaccharides production from poplar.
有机酸水解是从木质纤维素生产木二糖（XOS）的一种有潜力的方法。然而，木质素含量对有机酸水解生产 XOS 的影响尚不清楚。在这项工作中，研究了脱木质素对杨树用乙酸（AC）水解生产 XOS 的影响。由 0-200mM HSO 催化的过氧乙酸（HPAC）预处理（HPAC0-HPAC200）去除了杨树木质素的 21.6-86.5%。HPAC 预处理增加了木聚糖对 AC 溶液的可及性，从而增加了 AC 水解过程中木聚糖的去除。适当的脱木质素（61.7%）导致 AC 水解的 XOS 产率最高，达到 37.4%，比最佳 XOS 产率（28.8%）从原始杨木提高了 29.9%。碱性后孵育后，杨树木质素残渣的葡萄糖产率从 57.1%提高到 78.6%。这项工作开发了一种脱木质素工艺，可有效提高杨树中 XOS 和单糖的产量。
