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Self-Buffering Effect of Solids During High-Solid Enzymatic Hydrolysis of Lignocellulose.

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Title: Self-Buffering Effect of Solids During High-Solid Enzymatic Hydrolysis of Lignocellulose.
Authors: Shi, Xin1,2 (AUTHOR), Wang, Lan1,2 (AUTHOR) wanglan@ipe.ac.cn, Chen, Hongzhang1,2 (AUTHOR)
Source: BioEnergy Research. Sep2024, Vol. 17 Issue 3, p1701-1711. 11p.
Subjects: Corn stover, Deionization of water, Biochemical substrates, Biological products, Surface area, Lignins, Beta-glucans, Lignocellulose
Abstract: The role of buffer in modulating the enzymatic hydrolysis environment of lignocellulose is crucial. However, studies on the impact of buffer on high-solid enzymatic hydrolysis remain limited. This study discovered that utilizing deionized water as a reaction medium, rather than the conventional buffer, did not influence the enzymatic hydrolysis of steam-exploded corn stover when the solid loading ranged between 15 and 25%. At 15% solid loading, the glucan conversion in the group treated with buffer was recorded at 89.8%, with a corresponding glucose concentration of 51.1 g/L. In contrast, the group without buffer exhibited a conversion of 88.9% and a glucose concentration of 50.5 g/L. The increase of acid groups in lignin was attributed to the formation of phenolic hydroxyls during steam explosion, which provided the substrate with the necessary conditions for buffering effects. Sequentially, during the high-solid enzymatic hydrolysis process, the substrate's increased pore volume and specific surface area could potentially offset the buffering capacity, which led to the buffering effect becoming ineffective. Leveraging the self-buffering effect of the substrate, a fed-batch strategy was developed. This strategy replaced the water supplementation with buffers, augmenting the solid loading from 20 to 33% across six distinct feeding sessions over a span of 72 h. This not only reduced costs but also laid the foundation for the industrial viability of lignocellulosic high-concentration sugar production, thereby advancing the biofuels and bioproducts sector. These findings provide valuable insights for the exploration of solid reaction processes. [ABSTRACT FROM AUTHOR]
Copyright of BioEnergy Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Self-Buffering Effect of Solids During High-Solid Enzymatic Hydrolysis of Lignocellulose.
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  Data: <searchLink fieldCode="AR" term="%22Shi%2C+Xin%22">Shi, Xin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Lan%22">Wang, Lan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> wanglan@ipe.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Hongzhang%22">Chen, Hongzhang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22BioEnergy+Research%22">BioEnergy Research</searchLink>. Sep2024, Vol. 17 Issue 3, p1701-1711. 11p.
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  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Corn+stover%22">Corn stover</searchLink><br /><searchLink fieldCode="DE" term="%22Deionization+of+water%22">Deionization of water</searchLink><br /><searchLink fieldCode="DE" term="%22Biochemical+substrates%22">Biochemical substrates</searchLink><br /><searchLink fieldCode="DE" term="%22Biological+products%22">Biological products</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+area%22">Surface area</searchLink><br /><searchLink fieldCode="DE" term="%22Lignins%22">Lignins</searchLink><br /><searchLink fieldCode="DE" term="%22Beta-glucans%22">Beta-glucans</searchLink><br /><searchLink fieldCode="DE" term="%22Lignocellulose%22">Lignocellulose</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The role of buffer in modulating the enzymatic hydrolysis environment of lignocellulose is crucial. However, studies on the impact of buffer on high-solid enzymatic hydrolysis remain limited. This study discovered that utilizing deionized water as a reaction medium, rather than the conventional buffer, did not influence the enzymatic hydrolysis of steam-exploded corn stover when the solid loading ranged between 15 and 25%. At 15% solid loading, the glucan conversion in the group treated with buffer was recorded at 89.8%, with a corresponding glucose concentration of 51.1 g/L. In contrast, the group without buffer exhibited a conversion of 88.9% and a glucose concentration of 50.5 g/L. The increase of acid groups in lignin was attributed to the formation of phenolic hydroxyls during steam explosion, which provided the substrate with the necessary conditions for buffering effects. Sequentially, during the high-solid enzymatic hydrolysis process, the substrate's increased pore volume and specific surface area could potentially offset the buffering capacity, which led to the buffering effect becoming ineffective. Leveraging the self-buffering effect of the substrate, a fed-batch strategy was developed. This strategy replaced the water supplementation with buffers, augmenting the solid loading from 20 to 33% across six distinct feeding sessions over a span of 72 h. This not only reduced costs but also laid the foundation for the industrial viability of lignocellulosic high-concentration sugar production, thereby advancing the biofuels and bioproducts sector. These findings provide valuable insights for the exploration of solid reaction processes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of BioEnergy Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1007/s12155-024-10744-5
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 1701
    Subjects:
      – SubjectFull: Corn stover
        Type: general
      – SubjectFull: Deionization of water
        Type: general
      – SubjectFull: Biochemical substrates
        Type: general
      – SubjectFull: Biological products
        Type: general
      – SubjectFull: Surface area
        Type: general
      – SubjectFull: Lignins
        Type: general
      – SubjectFull: Beta-glucans
        Type: general
      – SubjectFull: Lignocellulose
        Type: general
    Titles:
      – TitleFull: Self-Buffering Effect of Solids During High-Solid Enzymatic Hydrolysis of Lignocellulose.
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          Name:
            NameFull: Shi, Xin
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            NameFull: Wang, Lan
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            NameFull: Chen, Hongzhang
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            – D: 01
              M: 09
              Text: Sep2024
              Type: published
              Y: 2024
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