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首页> 外文期刊>Bioprocess and Biosystems Engineering >Improving cellulosic ethanol fermentation efficiency by converting endogenous water-soluble carbohydrates into citric acid before pretreatment
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Improving cellulosic ethanol fermentation efficiency by converting endogenous water-soluble carbohydrates into citric acid before pretreatment

机译：通过在预处理之前将内源水溶性碳水化合物转化为柠檬酸来提高纤维素乙醇的发酵效率

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摘要

Water-soluble carbohydrates in raw lignocellulosic biomass are converted into hydroxymethylfurfural (HMF) in the acid-based pretreatment, thus increasing the detoxification intensity and reducing the fermentation efficiency of cellulosic ethanol. Therefore, reducing water-soluble carbohydrates in raw corn stover is crucially important to reduce the inhibitors' generation and improve the ethanol fermentation efficiency. In this study, aerobic solid-state fermentation of corn stover by inoculating Aspergillus niger spores converted 83% of the endogenous water-soluble carbohydrates into citric acid, leading to the decrease of 41% of HMF generation and 8% of sulfuric acid usage during the dry acid pretreatment. The reduced inhibitor generation improved the ethanol fermentability by 11% more ethanol than that of the corn stover without water-soluble carbohydrates' removal. This suggests that the removal of the water-soluble carbohydrates before pretreatment significantly reduced the inhibitors' generation in pretreatment and improved the fermentation efficiency of cellulosic ethanol.
机译：木质纤维素生物质原料中的水溶性碳水化合物在基于酸的预处理中转化为羟甲基糠醛（HMF），从而增加了解毒强度并降低了纤维素乙醇的发酵效率。因此，减少玉米秸秆中的水溶性碳水化合物对于减少抑制剂的产生和提高乙醇发酵效率至关重要。在这项研究中，通过接种黑曲霉孢子进行玉米秸秆的有氧固态发酵，将83％的内源水溶性碳水化合物转化为柠檬酸，从而导致HMF生成量减少41％，硫酸使用量减少8％。干酸预处理。与不去除水溶性碳水化合物的玉米秸秆相比，减少的抑制剂生成使乙醇的乙醇发酵能力提高了11％。这表明在预处理之前除去水溶性碳水化合物显着减少了预处理中抑制剂的产生，并提高了纤维素乙醇的发酵效率。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2019年第7期|1099-1103|共5页
  • 作者

    Dong Weitao; Han Xushen; Liu Gang; Bao Jie;

  • 作者单位

    East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China|Minist Agr, Biogas Inst, Key Lab Dev & Applicat Rural Renewable Energy, Chengdu 610041, Sichuan, Peoples R China;

    East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Water-soluble carbohydrates; Solid-state citric acid fermentation; Hydroxymethylfurfural; Corn stover; Cellulosic ethanol;

    机译：水溶性碳水化合物;柠檬酸固态发酵;羟甲基糠醛;玉米秸秆;纤维素乙醇;

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