文献类型：期刊文献

英文题名：A coupling strategy combined with acid-hydrothermal and novel DES pretreatment: Enhancing biomethane yield under solid-state anaerobic digestion and efficiently producing xylo-oligosaccharides and recovered lignin from poplar waste

作者：Xie, Jingcong[1] Zhao, Jian[1] Xu, Hao[1] Zhang, Ning[1] Chen, Yifeng[1] Yang, Jing[1] Wang, Kui[1] Jiang, Jianchun[1]

第一作者：Xie, Jingcong

通信作者：Yang, J[1];Jiang, JC[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat, Key Lab Chem Engn Forest Prod,Natl Forestry & Gras, Nanjing 210042, Jiangsu, Peoples R China

年份：2024

卷号：274

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20242716616426);Scopus(收录号：2-s2.0-85197229925);WOS:【SCI-EXPANDED(收录号:WOS:001265148500001)】；

基金：This work was supported by Fundamental Research funds for the Central Nonprofit Research Institution of CAF (Grant No. CAFYBB2021ZA003) , National Key Research and Development Program of China (Grant No. 2023YFD2201603) , the Opening Foundation of Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration (Grant No. JPELBCPI2018007) , the Natural Science Foundation of Jiangsu Province (Grant No. BK20180153) and the Foundation of Jiangsu Provincial Key Laboratory of Biomass Energy and Materials (Grant No. JSBEM-S-202213, JSBEM-S-202320) .

语种：英文

外文关键词：Biomass lignocellulose; Delignification; Biomethane production

摘要：Lignocellulose is an abundant renewable bio-macromolecular complex, which can be used to produce biomethane and other high-value products. The lignin, presents in lignocellulose is typically regarded as an inhibitor of anaerobic digestion. Therefore, it is crucial to develop a novel selective separation strategy to achieve efficient biomethane production and all-component utilization of biomass. Hence, a combination of two-step pretreatment and solid-state anaerobic digestion was employed to enhance the production of biomethane and to generate valuable chemicals from poplar waste. Optimal conditions (4 % acetic acid, 170 degrees C, and 40 min) resulted in 70.85 % xylan removal, yielding 50.28 % xylo-oligosaccharides. The effect of a strong acid 4-CSA-based novel three-constituent DES on delignification was investigated from 80 degrees C to 100 degrees C; the cellulose content of DES pretreated poplar increased from 64.11 % to 80.92 %, and the delignification rate increased from 49.0 % to 90.4 %. However, high delignification of the pretreated poplar (DES-100 and DES-110) led to a rapid accumulation of volatile organic acids during the hydrolysis and acidogenesis stages, resulting in methanogenesis inhibition. The highest biomethane yield of 208 L/kg VS was achieved with DES-80 (49.0 % delignification), representing a 148 % improvement compared over untreated poplar. This approach demonstrates the potential for comprehensive utilization of all components of biomass waste.