Crude glycerol-water organosolv delignification of sugarcane bagasse to produce fermentable sugars

OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA Pub Date : 2024-07-15 DOI:10.55905/oelv22n7-172

Renata Vidal dos Santos, Michelle Garcia Gomes, Gabriela Ciribelli Santos Pompêu, P. O. Rodrigues, M. A. Baffi, L. V. A. Gurgel, Daniel Pasquini

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Abstract

This study evaluated the organosolv pretreatment with crude glycerol as a cosolvent for the delignification of raw sugarcane bagasse and the release of fermentable sugars from enriched-cellulose fraction by enzymatic hydrolysis. The pretreated solid fractions were characterized by pulp yield, weight loss, cellulose and hemicellulose content, lignin content, and delignification extent. Condition 9 (210 ºC, 60 min, 8 mL g-1) led to the highest delignification (~79%) with high total reducing sugars (TRS) concentration (~300 g L-1) and lower carbohydrate preservation (< 41%). While condition 1 (180 ºC, 150 min, 8 mL g-1) led to the highest cellulose preservation (~70%) and TRS (> 412 g L-1), even with a lower delignification extent (> 69%). This work contributed to an effective and optimized strategy to reuse crude glycerol in organosolv pretreatment as a facilitator of lignocellulose delignification, in addition to validating new protocols for the biorefinery production chain, providing sustainable biomaterials with added value.

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甘蔗渣的粗甘油-水有机溶胶脱木素以生产可发酵糖类

本研究评估了用粗甘油作为助溶剂对原甘蔗渣进行有机溶胶预处理，使其脱木质素，并通过酶水解从富集纤维素部分释放可发酵糖。预处理后的固体馏分通过纸浆产量、重量损失、纤维素和半纤维素含量、木质素含量和脱木素程度进行表征。条件 9（210 ºC，60 分钟，8 mL g-1）的木质素脱除率最高（约为 79%），总还原糖（TRS）浓度较高（约为 300 g L-1），碳水化合物保存率较低（< 41%）。而条件 1（180 ºC，150 分钟，8 mL g-1）的纤维素保存率（~70%）和还原糖浓度（> 412 g L-1）最高，但脱木质程度较低（> 69%）。这项工作为有机溶胶预处理中粗甘油的再利用提供了有效的优化策略，促进了木质纤维素的脱木质化，此外还验证了生物精炼生产链的新方案，提供了具有附加值的可持续生物材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA

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