Enhanced biomass densification pretreatment using binary chemicals for efficient lignocellulosic valorization

IF 20.2 Q1 MATERIALS SCIENCE, PAPER & WOOD Journal of Bioresources and Bioproducts Pub Date : 2024-10-01 DOI:10.1016/j.jobab.2024.09.004
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Abstract

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 application in industry. Besides, the valorization of lignin-rich residue from pretreated biomass after hydrolysis 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 condition (121 °C) with a biomass working mass as high as 400 kg/m3. 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 derived from DLCA(SA-MS) biomass residue was highly adsorptive and suitable for dyeing wastewater 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.
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利用二元化学品加强生物质致密化预处理,实现木质纤维素的高效增值
目前已开发出许多有效的木质纤维素升级预处理方法(如稀酸、稀碱、离子液体等),但其工作质量低、糖分损失高以及固液分离和水洗的额外成本等缺点阻碍了其在工业中的大规模应用。此外,经过水解或发酵预处理的生物质中富含木质素的残留物的价值提升极大地促进了木质纤维素生物炼制的经济性和可持续性,而这一点通常被低估。本研究开发了一种使用二元化学品(用硫酸(SA)和金属盐(MS)对木质纤维素生物质进行致密化预处理,然后进行高压釜处理(DLCA(SA-MS))的致密化预处理方法,该方法在温和条件(121 °C)下进行,生物质工作质量高达 400 kg/m3。DLCA(SA-MS)生物质的糖保留率超过 95%,酶糖转化率达到 90%,可发酵糖的浓度高达 212.3 克/升,发酵性极佳。此外,从 DLCA(SA-MS)生物质残渣中提取的生物吸附剂具有很强的吸附性,适用于印染废水处理,为富含木质素的残渣价值化提供了一种可行且环保的方法。这些研究结果表明,DLCA(SA-MS)预处理可实现生物质的全组分利用,提高木质纤维素生物炼制的经济可行性。
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来源期刊
Journal of Bioresources and Bioproducts
Journal of Bioresources and Bioproducts Agricultural and Biological Sciences-Forestry
CiteScore
39.30
自引率
0.00%
发文量
38
审稿时长
12 weeks
期刊最新文献
Editorial Board Enhanced biomass densification pretreatment using binary chemicals for efficient lignocellulosic valorization Development of Methylene Bis-Benzotriazolyl Tetramethylbutylphenol-grafted lignin sub-microspheres loaded with TiO2 for sunscreen applications Cavitation as a zero-waste circular economy process to convert citrus processing waste into biopolymers in high demand Selective biomass conversion over novel designed tandem catalyst
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