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Biohydrogen production from lactate derived via co-fermentation of cassava starch wastewater and glycerol in a continuous multiple tube reactor.

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Title: Biohydrogen production from lactate derived via co-fermentation of cassava starch wastewater and glycerol in a continuous multiple tube reactor.
Authors: Baioco, Rafaela Adam1,2 (AUTHOR), Andreani, Cristiane Lurdes1,3 (AUTHOR), Orben, Jean Michel Chaves2 (AUTHOR), Rossi, Luana Cristina Calliari Leite1 (AUTHOR), Rodio, Eliandra1 (AUTHOR), Rafagnin, Karina1 (AUTHOR), Vaz, Victor1 (AUTHOR), Damasceno Gomes, Simone1 (AUTHOR) simone.gomes@unioeste.br
Source: Environmental Technology. Jun2026, Vol. 47 Issue 14, p2236-2249. 14p.
Subject Terms: *Hydrogen production, *Chemical oxygen demand, Lactic acid fermentation, Tubular reactors, Cassava starch, Lactates, Fermentation, Acetates
Abstract: This study evaluated biohydrogen production in a continuous multiple tube reactor (CMTR) using a lactic acid-rich substrate derived from the co-fermentation of cassava starch wastewater (CSW) with glycerol. The process had two stages: (i) lactic acid (LA) production in an anaerobic sequential batch reactor (ASBR); and (ii) use of the LA-rich substrate in the CMTR at different organic loading rates (OLRs): 48, 72, and 96 g COD L⁻¹ d⁻¹, with a fixed hydraulic retention time of 4 h. The lactic fermentation produced a homogeneous substrate with 41% LA and 52% glycerol, suitable for hydrogen generation. CMTR performance varied with OLR: the highest OLR (96 g COD L⁻¹ d⁻¹) resulted in the greatest volumetric hydrogen production rate (1,960.3 mL H₂ L⁻¹ d⁻¹), biogas flow (9,360.9 mL d⁻¹), and COD removal (41.8%). The intermediate OLR (72 g COD L⁻¹ d⁻¹) achieved the highest hydrogen yield (8.4 mmol H₂ g⁻¹ COD), along with 95% lactic acid and 65% glycerol conversion. Metabolite profiling reinforced LA's role as a strategic substrate in promoting efficient fermentative routes, indicating a selective shift toward the butyric pathway, where lactic and acetic acids are converted into butyric acid and hydrogen. Overall, the results demonstrate that lactic pre-fermentation of CSW and glycerol produces a viable substrate for biohydrogen production, enabling the application of elevated OLRs and maintaining a pH favourable to hydrogenogenic microbial activity. The CMTR proved to be a promising system for agro-industrial waste valorisation through sustainable hydrogen generation. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Technology is the property of Taylor & Francis Ltd 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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  Data: Biohydrogen production from lactate derived via co-fermentation of cassava starch wastewater and glycerol in a continuous multiple tube reactor.
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  Data: <searchLink fieldCode="AR" term="%22Baioco%2C+Rafaela+Adam%22">Baioco, Rafaela Adam</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Andreani%2C+Cristiane+Lurdes%22">Andreani, Cristiane Lurdes</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Orben%2C+Jean+Michel+Chaves%22">Orben, Jean Michel Chaves</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rossi%2C+Luana+Cristina+Calliari+Leite%22">Rossi, Luana Cristina Calliari Leite</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rodio%2C+Eliandra%22">Rodio, Eliandra</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rafagnin%2C+Karina%22">Rafagnin, Karina</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vaz%2C+Victor%22">Vaz, Victor</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Damasceno+Gomes%2C+Simone%22">Damasceno Gomes, Simone</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> simone.gomes@unioeste.br</i>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Technology%22">Environmental Technology</searchLink>. Jun2026, Vol. 47 Issue 14, p2236-2249. 14p.
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  Data: *<searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink><br />*<searchLink fieldCode="DE" term="%22Chemical+oxygen+demand%22">Chemical oxygen demand</searchLink><br /><searchLink fieldCode="DE" term="%22Lactic+acid+fermentation%22">Lactic acid fermentation</searchLink><br /><searchLink fieldCode="DE" term="%22Tubular+reactors%22">Tubular reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Cassava+starch%22">Cassava starch</searchLink><br /><searchLink fieldCode="DE" term="%22Lactates%22">Lactates</searchLink><br /><searchLink fieldCode="DE" term="%22Fermentation%22">Fermentation</searchLink><br /><searchLink fieldCode="DE" term="%22Acetates%22">Acetates</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study evaluated biohydrogen production in a continuous multiple tube reactor (CMTR) using a lactic acid-rich substrate derived from the co-fermentation of cassava starch wastewater (CSW) with glycerol. The process had two stages: (i) lactic acid (LA) production in an anaerobic sequential batch reactor (ASBR); and (ii) use of the LA-rich substrate in the CMTR at different organic loading rates (OLRs): 48, 72, and 96 g COD L⁻¹ d⁻¹, with a fixed hydraulic retention time of 4 h. The lactic fermentation produced a homogeneous substrate with 41% LA and 52% glycerol, suitable for hydrogen generation. CMTR performance varied with OLR: the highest OLR (96 g COD L⁻¹ d⁻¹) resulted in the greatest volumetric hydrogen production rate (1,960.3 mL H₂ L⁻¹ d⁻¹), biogas flow (9,360.9 mL d⁻¹), and COD removal (41.8%). The intermediate OLR (72 g COD L⁻¹ d⁻¹) achieved the highest hydrogen yield (8.4 mmol H₂ g⁻¹ COD), along with 95% lactic acid and 65% glycerol conversion. Metabolite profiling reinforced LA's role as a strategic substrate in promoting efficient fermentative routes, indicating a selective shift toward the butyric pathway, where lactic and acetic acids are converted into butyric acid and hydrogen. Overall, the results demonstrate that lactic pre-fermentation of CSW and glycerol produces a viable substrate for biohydrogen production, enabling the application of elevated OLRs and maintaining a pH favourable to hydrogenogenic microbial activity. The CMTR proved to be a promising system for agro-industrial waste valorisation through sustainable hydrogen generation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Environmental Technology is the property of Taylor & Francis Ltd 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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      – Type: doi
        Value: 10.1080/09593330.2026.2645961
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 2236
    Subjects:
      – SubjectFull: Hydrogen production
        Type: general
      – SubjectFull: Chemical oxygen demand
        Type: general
      – SubjectFull: Lactic acid fermentation
        Type: general
      – SubjectFull: Tubular reactors
        Type: general
      – SubjectFull: Cassava starch
        Type: general
      – SubjectFull: Lactates
        Type: general
      – SubjectFull: Fermentation
        Type: general
      – SubjectFull: Acetates
        Type: general
    Titles:
      – TitleFull: Biohydrogen production from lactate derived via co-fermentation of cassava starch wastewater and glycerol in a continuous multiple tube reactor.
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            NameFull: Baioco, Rafaela Adam
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            NameFull: Orben, Jean Michel Chaves
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            NameFull: Rossi, Luana Cristina Calliari Leite
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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            – TitleFull: Environmental Technology
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