Lin Zihe, Ying Wenjun, Wen Peiyao, Lian Zhina, Zhang Junhua
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; Jiangsu Province Key Laboratory of Green Biomass-based Fuels and Chemicals, Nanjing 210037, China.
Bioresour Technol. 2023 May;376:128848. doi: 10.1016/j.biortech.2023.128848. Epub 2023 Mar 9.
Hydrogen peroxide-acetic acid (HPAA) compositions affect the peracetic acid generation and subsequent delignification of lignocellulosic materials. However, the effects of HPAA compositions on lignin removal and poplar hydrolyzability after HPAA pretreatment are not fully elucidated yet. In this work, different volume ratios of HP to AA were used to pretreat poplar, AA and lactic acid (LA) hydrolysis of delignified poplar to produce XOS was compared. Peracetic acid was mainly produced in 1 h of HPAA pretreatment. HPAA with HP to AA ratio of 8:2 (HPAA) generated 4.4% peracetic acid and removed 57.7% of lignin at 2 h. Furthermore, XOS production from HPAA-pretreated poplar by AA and LA hydrolysis was increased by 97.1% and 14.9% compared to those from raw poplar, respectively. After alkaline incubation, the glucose yield of HPAA-AA-pretreated poplar increased from 40.1% to 97.1%. The study results indicated that HPAA was conducive to XOS and monosaccharides production from poplar..
过氧化氢-乙酸（HPAA）组合物会影响木质纤维素材料中过氧乙酸的生成及随后的脱木质素过程。然而，HPAA组合物对HPAA预处理后木质素去除及杨树水解性的影响尚未完全阐明。在本研究中，使用不同体积比的过氧化氢与乙酸对杨树进行预处理，并比较了脱木质素杨树经乙酸和乳酸（LA）水解生产木寡糖（XOS）的情况。过氧乙酸主要在HPAA预处理1小时内产生。过氧化氢与乙酸比例为8:2的HPAA（HPAA）在2小时时产生了4.4%的过氧乙酸并去除了57.7%的木质素。此外，与未处理的杨树相比，经HPAA预处理的杨树通过乙酸和乳酸水解生产木寡糖的量分别增加了97.1%和14.9%。碱性孵育后，经HPAA-乙酸预处理的杨树的葡萄糖产率从40.1%提高到了97.1%。研究结果表明，HPAA有利于从杨树生产木寡糖和单糖。
