Synergistic Improvement of Carbohydrate and Lignin Processability by Biomimicking Biomass Processing [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.48 Nuclear engineering
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2021
• Mô tả vật lý: Size: Article No. 194 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 262552
• Chủ đề: 1. 09 biomass fuels; 2. Fenton; 3. Lignocellulosic biomass; 4. Lipid; 5. Organosolv

Tóm tắt

 The sustainability and economic feasibility of modern biorefinery depend on the efficient processing of both carbohydrate and lignin fractions for value-added products. By mimicking the biomass degradation process in white-rote fungi, a tailored two-step fractionation process was developed to maximize the sugar release from switchgrass biomass and to optimize the lignin processability for bioconversion. Biomimicking biomass processing using Formic Acid: Fenton: Organosolv (F<
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 2<
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 O) and achieved high processability for both carbohydrate and lignin. Specifically, switchgrass pretreated by the F<
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 2<
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 O process had 99.6% of the theoretical yield for glucose release. The fractionated lignin was also readily processable by fermentation via Rhodococcus opacus PD630 with a lipid yield of 1.16 g/L. Scanning electron microscope analysis confirmed the fragmentation of switchgrass fiber and the cell wall deconstruction by the F<
 sub>
 2<
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 O process. 2D-HSQC NMR further revealed the cleavage of aryl ether linkages (?-O-4) in lignin components. These results revealed the mechanisms for efficient sugar release and lignin bioconversion. The F<
 sub>
 2<
 /sub>
 O process demonstrated effective mimicking of natural biomass utilization system and paved a new path for improving the lignin and carbohydrate processability in next generation lignocellulosic biorefinery.