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Biovalorization of brewer's spent grain as single-cell protein through coupling organosolv pretreatment and fungal cultivation.

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Title: Biovalorization of brewer's spent grain as single-cell protein through coupling organosolv pretreatment and fungal cultivation.
Authors: Parchami, Mohsen1 (AUTHOR), Mahboubi, Amir1 (AUTHOR) amir.mahboubi_soufiani@hb.se, Agnihotri, Swarnima1 (AUTHOR), Taherzadeh, Mohammad J.1 (AUTHOR)
Source: Waste Management. Sep2023, Vol. 169, p382-391. 10p.
Subjects: Brewer's spent grain, Liquors, Single cell proteins, Biomass production, Food industry, Proteins, Biofortification
Abstract: [Display omitted] • BSG biorefinery concept was introduced for SCP, ethanol, and lignin production. • Fractions of organosolv pretreated BSG could directly support Fungal cultivation. • A. oryzae cultivation on organosolv liquor gave highest protein content (44.8%) • A. oryzae outperformed N. intermedia in terms of biomass and protein content. • Increased substrate loading tripled ethanol production in fungal cultivation. • BSG Organosolv fractions favored fungal biomass production over ethanol production. Brewer's spent grain (BSG) is a clean byproduct from the food sector, comprising 85% of the brewing process solid byproducts. BSG is mainly used as low-quality animal feed and often ends up in landfills due to its short shelf life. However, considering its abundant availability and high nutritional content, BSG holds the potential for biorefineries to produce valuable products. The recalcitrant nature of BSG poses a challenge, requiring pretreatment steps. Therefore, this study focused on valorizing BSG obtained from organosolv pretreatment by producing food- and feed-grade single-cell protein (SCP). The BSG was subject to organosolv pretreatment at 180C for 2 h with 50% v/v ethanol as solvent. Filamentous fungi N. intermedia and A. oryzae were cultivated on as-received and different fractions of organosolv-treated BSG to evaluate the effect of factors such as pretreatment, fungal strain, pretreated fraction content, and substrate loading on fungal biomass yield, biomass composition (protein content), and metabolite production. A. oryzae cultivation on all tested substrates yielded 7%-40% more biomass than N. intermedia. Cultivating A. oryzae on organosolv liquor resulted in the highest biomass protein content (44.8% ± 0.7%) with a fungal biomass concentration of 5.1 g/L. A three-fold increase in the substrate loading increased the ethanol-to-substrate yield by 50%, while protein content was decreased by 23%. Finally, a biorefinery concept was proposed to integrate the organosolv pretreatment of BSG with fungal cultivation for maximum yield of SCP while obtaining other products such as lignin and ethanol, providing a sustainable rout for managing BSG. [ABSTRACT FROM AUTHOR]
Copyright of Waste Management is the property of Pergamon Press - An Imprint of Elsevier Science 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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 171367372
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Biovalorization of brewer's spent grain as single-cell protein through coupling organosolv pretreatment and fungal cultivation.
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  Data: <searchLink fieldCode="AR" term="%22Parchami%2C+Mohsen%22">Parchami, Mohsen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mahboubi%2C+Amir%22">Mahboubi, Amir</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> amir.mahboubi_soufiani@hb.se</i><br /><searchLink fieldCode="AR" term="%22Agnihotri%2C+Swarnima%22">Agnihotri, Swarnima</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Taherzadeh%2C+Mohammad+J%2E%22">Taherzadeh, Mohammad J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Waste+Management%22">Waste Management</searchLink>. Sep2023, Vol. 169, p382-391. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Brewer's+spent+grain%22">Brewer's spent grain</searchLink><br /><searchLink fieldCode="DE" term="%22Liquors%22">Liquors</searchLink><br /><searchLink fieldCode="DE" term="%22Single+cell+proteins%22">Single cell proteins</searchLink><br /><searchLink fieldCode="DE" term="%22Biomass+production%22">Biomass production</searchLink><br /><searchLink fieldCode="DE" term="%22Food+industry%22">Food industry</searchLink><br /><searchLink fieldCode="DE" term="%22Proteins%22">Proteins</searchLink><br /><searchLink fieldCode="DE" term="%22Biofortification%22">Biofortification</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: [Display omitted] • BSG biorefinery concept was introduced for SCP, ethanol, and lignin production. • Fractions of organosolv pretreated BSG could directly support Fungal cultivation. • A. oryzae cultivation on organosolv liquor gave highest protein content (44.8%) • A. oryzae outperformed N. intermedia in terms of biomass and protein content. • Increased substrate loading tripled ethanol production in fungal cultivation. • BSG Organosolv fractions favored fungal biomass production over ethanol production. Brewer's spent grain (BSG) is a clean byproduct from the food sector, comprising 85% of the brewing process solid byproducts. BSG is mainly used as low-quality animal feed and often ends up in landfills due to its short shelf life. However, considering its abundant availability and high nutritional content, BSG holds the potential for biorefineries to produce valuable products. The recalcitrant nature of BSG poses a challenge, requiring pretreatment steps. Therefore, this study focused on valorizing BSG obtained from organosolv pretreatment by producing food- and feed-grade single-cell protein (SCP). The BSG was subject to organosolv pretreatment at 180C for 2 h with 50% v/v ethanol as solvent. Filamentous fungi N. intermedia and A. oryzae were cultivated on as-received and different fractions of organosolv-treated BSG to evaluate the effect of factors such as pretreatment, fungal strain, pretreated fraction content, and substrate loading on fungal biomass yield, biomass composition (protein content), and metabolite production. A. oryzae cultivation on all tested substrates yielded 7%-40% more biomass than N. intermedia. Cultivating A. oryzae on organosolv liquor resulted in the highest biomass protein content (44.8% ± 0.7%) with a fungal biomass concentration of 5.1 g/L. A three-fold increase in the substrate loading increased the ethanol-to-substrate yield by 50%, while protein content was decreased by 23%. Finally, a biorefinery concept was proposed to integrate the organosolv pretreatment of BSG with fungal cultivation for maximum yield of SCP while obtaining other products such as lignin and ethanol, providing a sustainable rout for managing BSG. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Waste Management is the property of Pergamon Press - An Imprint of Elsevier Science 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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    Identifiers:
      – Type: doi
        Value: 10.1016/j.wasman.2023.07.021
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 382
    Subjects:
      – SubjectFull: Brewer's spent grain
        Type: general
      – SubjectFull: Liquors
        Type: general
      – SubjectFull: Single cell proteins
        Type: general
      – SubjectFull: Biomass production
        Type: general
      – SubjectFull: Food industry
        Type: general
      – SubjectFull: Proteins
        Type: general
      – SubjectFull: Biofortification
        Type: general
    Titles:
      – TitleFull: Biovalorization of brewer's spent grain as single-cell protein through coupling organosolv pretreatment and fungal cultivation.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Parchami, Mohsen
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            NameFull: Mahboubi, Amir
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            NameFull: Agnihotri, Swarnima
      – PersonEntity:
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            NameFull: Taherzadeh, Mohammad J.
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          Dates:
            – D: 01
              M: 09
              Text: Sep2023
              Type: published
              Y: 2023
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              Value: 169
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            – TitleFull: Waste Management
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