高固相密度条件下秸秆酶碱协同预处理发酵及经济分析研究

IF 7 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-09 DOI:10.1016/j.seta.2025.104607

Mengran Gao , Zhi Wang , Mengying Liang , Lian Zhang , Zhengzhong Xu , Yafan Cai , Wei Zhuang , Dong Liu , Chenjie Zhu , Shilei Wang , Jingliang Xu , Hanjie Ying

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引用次数: 0

摘要

在运输、储存和预处理过程中，木质纤维素的综合使用是低效的。因此，通过预处理过程与木质纤维素的运输和储存同时进行，可以提高生物质转化为能量的效率。然而，玉米秸秆以低含水量的致密形式运输和储存不利于其预处理和酶解。因此，本研究探讨了高固体负荷（0.5 g/g H2O）和低碱浓度（0.02-2 g/100 g CS）条件下酶碱协同作用的机理。比较了高固密度预处理对环境和经济成本的影响。综合理化性质表明，在高固体负载下，酶碱协同作用与结构破坏、结晶度提高和热稳定性增强呈正相关。发酵性能表明，预处理后的秸秆中纤维素和半纤维素的利用率分别达到95.25%和46.88%，乙醇和木糖醇的转化率分别达到93.00%和29.19%。该研究结果为高固相酶-碱协同预处理的工业应用提供了理论依据，以实现高效节能和可持续发展。

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Research on fermentation and economic analysis of enzyme-alkali synergistic pretreatment of stover under high solid-phase densification conditions

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Research on fermentation and economic analysis of enzyme-alkali synergistic pretreatment of stover under high solid-phase densification conditions

The integrated lignocellulose usage throughout transit, storage, and pretreatment is inefficient. Therefore, the efficiency of biomass conversion to energy can be improved by performing the pretreatment process concurrently with the transit and storage of lignocellulose. However, the transportation and storage of corn stover in a densified form with low moisture content is detrimental to its pretreatment and enzymatic hydrolysis. Therefore, this work investigates the mechanism of enzyme-alkali synergism at high-solids loadings (0.5 g/g H₂O) and low alkali concentration (0.02–2 g/100 g CS) conditions. The effects of high solids densification pretreatment compared to other pretreatments on the environment and economic costs were also investigated. The integrated physicochemical properties indicated that enzyme-alkali synergism was positively correlated with disrupted structure, increased crystallinity, and enhanced thermal-stability under high-solids loadings. The fermentation performance showed that the utilization rate of cellulose and hemicellulose in the pretreated stover reached 95.25 % and 46.88 %, respectively, and the conversion rate of ethanol and xylitol were 93.00 % and 29.19 %. This result provides a theoretical basis for the industrial application of high-solids enzymatic-alkaline synergistic pretreatment for more energy-efficient and sustainable development.

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来源期刊

Sustainable Energy Technologies and Assessments Energy-Renewable Energy, Sustainability and the Environment

CiteScore

12.70

自引率

12.50%

发文量

1091

期刊介绍： Encouraging a transition to a sustainable energy future is imperative for our world. Technologies that enable this shift in various sectors like transportation, heating, and power systems are of utmost importance. Sustainable Energy Technologies and Assessments welcomes papers focusing on a range of aspects and levels of technological advancements in energy generation and utilization. The aim is to reduce the negative environmental impact associated with energy production and consumption, spanning from laboratory experiments to real-world applications in the commercial sector.