Enhanced biomass densification pretreatment using binary chemicals for efficient lignocellulosic valorization

作     者：Xinchuan Yuan Guannan Shen Juncheng Huo Sitong Chen Wenyuan Shen Chengcheng Zhang Mingjie Jin 

作者机构：School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China 

出 版 物：《Journal of Bioresources and Bioproducts》 (生物质资源与工程（英文）)

年 卷 期：2024年第9卷第4期

页      面：548-564页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：supported by the National Key R&D Program of China(No.2021YFC2101301) 

主　　题：Lignocellulosic biorefinery Densification pretreatment Binary chemicals Enzymatic hydrolysis and fermentation Full-component utilization Bio-adsorbent 

摘      要：Many effective pretreatment methods (such as dilute acid, dilute alkali, ionic liquids, etc.) have been developed for lignocellulose upgrading, but several defaults of low working mass, high sugar loss and extra cost of solid-liquid separation and water washing hinder their large-scale applica- tion in industry. Besides, the valorization of lignin-rich residue from pretreated biomass after hy- drolysis or fermentation greatly contributes to the economy and sustainability of lignocellulosic biorefinery, which is usually underestimated. This study developed a densification pretreatment with binary chemicals (densifying lignocellulosic biomass with sulfuric acid (SA) and metal salt (MS) followed by autoclave treatment ((DLCA(SA-MS)), which was conducted under mild con- dition (121 ℃) with a biomass working mass as high as 400 kg/m^(3) . The DLCA(SA-MS) biomass achieved over 95% sugar retention, 90% enzymatic sugar conversion and a high concentration of fermentable sugar (212.3 g/L) with superior fermentability. Furthermore, bio-adsorbent de- rived from DLCA(SA-MS) biomass residue was highly adsorptive and suitable for dyeing wastew- ater treatment, providing a feasible and eco-friendly method for lignin-rich residue valorization. These findings indicated that DLCA(SA-MS) pretreatment enables the full-component utilization of biomass and boosts the economic viability of lignocellulosic biorefinery.