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首页> 外文期刊>Bioenergy research >Dilute Acid Pretreatment of Douglas Fir Forest Residues: Pretreatment Yield, Hemicellulose Degradation, and Enzymatic Hydrolysability
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Dilute Acid Pretreatment of Douglas Fir Forest Residues: Pretreatment Yield, Hemicellulose Degradation, and Enzymatic Hydrolysability

机译：道格拉斯杉木林残留物的稀酸预处理：预处理产量，半纤维素降解和酶水解性

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摘要

Two Douglas fir (D. fir) forest residues were evaluated for fermentable sugar production by dilute acid pretreatment and subsequent enzymatic hydrolysis in comparison with a clean D. fir wood chip sample. Detailed mass balances of cellulose, hemicellulose, and lignin fractions presented in D. fir samples during pretreatment and enzyme hydrolysis processes were determined. The presence of higher bark and lignin content in D. fir forest residues lowered substrate hydrolysability by 25–36 % compared to clean D. fir wood chips. A significant variation in biomass recalcitrance between the two forest residues toward biomass pretreatment and enzymatic hydrolysis was also found and reflected by a significant difference in final glucose yield (by ~20 %). Applying ball-milling treatment of pretreated D. fir residues prior to enzyme hydrolysis can significantly enhance their hydrolysability. Both chemical composition and physical property factors (i.e., bulk density) contributed to the recalcitrant nature of forest residues.
机译：与纯净的杉木木屑样品相比，通过稀酸预处理和随后的酶促水解评估了两种道格拉斯杉木（D. fir）森林残余物的可发酵糖产量。确定了预处理和酶水解过程中冷杉样品中存在的纤维素，半纤维素和木质素组分的详细质量平衡。与干净的杉木木屑相比，杉木森林残留物中较高的树皮和木质素含量使底物的水解性降低了25–36％。还发现了两个森林残渣之间对生物量预处理和酶促水解的生物量顽抗性的显着变化，并反映在最终葡萄糖产量的显着差异（约20％）上。在酶水解之前对预处理的D. fir残留物进行球磨处理可以显着提高其水解能力。化学成分和物理特性因素（即堆积密度）都对森林残留物的顽固性做出了贡献。

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  • 来源
    《Bioenergy research》 |2015年第1期|42-52|共11页
  • 作者

    Carlos Alvarez-Vasco; Mond Guo; Xiao Zhang;

  • 作者单位

    1.Voiland School of Chemical Engineering and Bioengineering. Bioproducts Science and Engineering Laboratory Washington State University Richland WA 99354 USA;

    1.Voiland School of Chemical Engineering and Bioengineering. Bioproducts Science and Engineering Laboratory Washington State University Richland WA 99354 USA;

    1.Voiland School of Chemical Engineering and Bioengineering. Bioproducts Science and Engineering Laboratory Washington State University Richland WA 99354 USA;

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  • 正文语种 eng
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  • 关键词

    Dilute acid pretreatment Softwood Enzymatic hydrolysis Forest residues;

    机译：稀酸预处理软木酶促水解森林残留物;

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