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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：通过在预处理前将内源水溶性碳水化合物转化为柠檬酸来改善纤维素乙醇发酵效率

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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：在基于酸的预处理中，将水溶性碳水化合物中的水溶性碳水化合物转化为酸的预处理中的羟甲基糠醛（HMF），从而提高了解毒强度并降低了纤维素乙醇的发酵效率。因此，在生玉米秸秆中降低水溶性碳水化合物对于降低抑制剂的产生并改善乙醇发酵效率，这是至关重要的。在本研究中，通过接种曲霉孢子孢子的有氧固态发酵玉米秸秆转化为83％的内源性水溶性碳水化合物进入柠檬酸，导致减少41％的HMF生成和8％的硫酸使用干酸预处理。降低的抑制剂产生将乙醇发酵能量提高11％，乙醇比玉米秸秆的除去水溶性碳水化合物的去除。这表明在预处理前除去水溶性碳水化合物显着降低了预处理中的抑制剂的产生，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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  • 原文格式 PDF
  • 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;固态柠檬酸发酵;羟甲基糠醛;玉米秸秆;纤维素乙醇;

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