Cascading fractionation of sugarcane bagasse via a novel bio-based organic amine solvent mediated green biorefinery process

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2025-09-20 DOI:10.1016/j.biombioe.2025.108421

Jun Deng , Xinshu Zhuang , Changlin Miao , Yuanlong Xu , Quan Zhang

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Abstract

Developing renewable, biodegradable organic solvent systems remains a significant challenge. In this study, two solvent systems ethanolamine-aqueous (EA-H₂O) and ethanolamine-potassium hydroxide (EA-KOH) were constructed to investigate their effects on the solid recovery, cell wall components, and polymers extraction in sugarcane bagasse. Additionally, the feasibility of using the organic waste liquid generated during lignocellulose fractionation process as a liquid fertilizer was evaluated. Under optimal conditions combining 20 % (v/v) EA and 1 % (w/v) KOH at 70 °C for 3 h, 77.1 % of lignin and 21.8 % of hemicellulose were removed with 94.1 % of cellulose retention. Also, the optimal pretreated residue achieved 82.4 % glucose yield and 78.2 % xylose yield with enzymatic hydrolysis by removing lignin and boosting cellulose accessibility. Notably, the EA-KOH aqueous solvent system demonstrated effective recyclability and reusability. And the recovered lignin exhibits reduced heterogeneity with low molecular weight. Furthermore, the liquid waste resulting from lignin recovery stimulates rice seedling growth by boosting biomass yield and photosynthetic pigments content. Hence, this eco-friendly EA-KOH system allows for the effective and complete utilization of all components in sugarcane bagasse, facilitating the green biorefinery realization.

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新型生物基有机胺溶剂介导的甘蔗渣级联分馏绿色生物炼制工艺

开发可再生、可生物降解的有机溶剂系统仍然是一个重大挑战。本研究建立了乙醇胺-水（EA-H2O）和乙醇胺-氢氧化钾（EA-KOH）两种溶剂体系，研究了它们对蔗渣固体回收率、细胞壁成分和聚合物提取的影响。此外，还对木质纤维素分馏过程中产生的有机废液作为液体肥料的可行性进行了评价。在最佳条件下，20% (v/v) EA和1% (w/v) KOH在70℃下作用3 h，木质素脱除率为77.1%，半纤维素脱除率为21.8%，纤维素保留率为94.1%。通过去除木质素和提高纤维素的可及性，最佳预处理残渣的葡萄糖产率为82.4%，木糖产率为78.2%。值得注意的是，EA-KOH水溶液体系表现出有效的可回收性和可重复使用性。回收的木质素具有较低的分子量和较低的不均匀性。此外，木质素回收产生的废液通过提高生物质产量和光合色素含量来促进水稻幼苗生长。因此，这种环保的EA-KOH系统可以有效和完全地利用甘蔗渣中的所有成分，促进绿色生物炼制的实现。

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来源期刊

Biomass & Bioenergy 工程技术-能源与燃料

CiteScore

11.50

自引率

3.30%

发文量

258

审稿时长

60 days

期刊介绍： Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials. The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy. Key areas covered by the journal: • Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation. • Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal. • Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes • Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation • Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.