使用碱性过氧化氢/戊醇双相预处理法分馏小麦秸秆中的木质素和可发酵糖。

IF 4.1 2区生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of biotechnology Pub Date : 2024-10-18 DOI:10.1016/j.jbiotec.2024.10.004

Yue Wu , Hui Zhang , Qixuan Lin , Ruonan Zhu , Lihong Zhao , Xingjie Wang , Junli Ren , Ling Meng

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引用次数: 0

摘要

为了突破碱性过氧化氢（AHP）预处理的脱木素饱和点（DSP），本研究提出了一种双相 AHP/ 戊醇（AHPP）预处理方法。对温度和 H2O2 浓度进行了评估。在最佳条件下（110 °C、2 小时、4% H2O2），木质素的去除率为 70.73%，比传统的 AHP 预处理提高了 11.65%，表明添加戊醇成功克服了 DSP。葡聚糖和木聚糖的消化率分别达到 85.74% 和 88.62%，比 AHP 预处理提高了 7.41% 和 5.87%。此外，从有机相中提取的木质素占脱木质素的 38.51%，且分子量较低，有效地保留了 β-O-4 键。最后，经过第四次循环 AHPP 预处理后，戊醇回收率（77.91%）和木质素脱除率（57.19%）均达到了令人满意的水平，同时葡聚糖（76.11%）和木聚糖（77.52%）的消化率也很高。因此，在生物精炼概念中，AHPP 预处理是一种很有前景的生物质增值方法。

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Fractionation of lignin and fermentable sugars from wheat straw using an alkaline hydrogen peroxide/pentanol biphasic pretreatment

To breakthrough the delignification saturation point (DSP) of alkaline hydrogen peroxide (AHP) pretreatment, a biphasic AHP/pentanol (AHPP) pretreatment was proposed in this work. The temperature and H₂O₂ concentration were evaluated. Under the optimal conditions (110 °C, 2 h, 4 % H₂O₂), 70.73 % of lignin was removed, which was increased by 11.65 % than the traditional AHP pretreatment, indicating successful overcoming of the DSP by adding pentanol. 85.74 % and 88.62 % of glucan and xylan digestibility were achieved, respectively, which increased by 7.41 % and 5.87 % as compared to AHP pretreatment. Furthermore, the lignin extracted from the organic phase accounted for 38.51 % of the delignification, and it had a low molecular weight, effectively preserving the β-O-4 bonds. Finally, satisfied pentanol recovery (77.91 %) and delignification (57.19 %) along with excellent glucan (76.11 %) and xylan (77.52 %) digestibility were reached after fourth recycling of AHPP pretreatment. Therefore, AHPP pretreatment was a promising method for biomass valorization within biorefinery concept.

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来源期刊

Journal of biotechnology 工程技术-生物工程与应用微生物

CiteScore

8.90

自引率

2.40%

发文量

190

审稿时长

45 days

期刊介绍： The Journal of Biotechnology has an open access mirror journal, the Journal of Biotechnology: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The Journal provides a medium for the rapid publication of both full-length articles and short communications on novel and innovative aspects of biotechnology. The Journal will accept papers ranging from genetic or molecular biological positions to those covering biochemical, chemical or bioprocess engineering aspects as well as computer application of new software concepts, provided that in each case the material is directly relevant to biotechnological systems. Papers presenting information of a multidisciplinary nature that would not be suitable for publication in a journal devoted to a single discipline, are particularly welcome.