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Bioremediation of agricultural runoff and biopolymers production from cyanobacteria cultured in demonstrative full-scale photobioreactors.

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Title: Bioremediation of agricultural runoff and biopolymers production from cyanobacteria cultured in demonstrative full-scale photobioreactors.
Authors: Rueda, Estel1 (AUTHOR), García-Galán, María Jesús2 (AUTHOR), Ortiz, Antonio2 (AUTHOR), Uggetti, Enrica2 (AUTHOR), Carretero, Javier2 (AUTHOR), García, Joan2 (AUTHOR), Díez-Montero, Rubén1,2 (AUTHOR) ruben.diez.montero@upc.edu
Source: Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B. Jul2020, Vol. 139, p241-250. 10p.
Subject Terms: *Agricultural pollution, *Bioremediation, *Cyanobacteria, *Microalgae, Photobioreactors, Carbohydrates
Abstract: • Full-scale photobioreactors were tested for PHB production by cyanobacteria. • Cyanobacteria were selected over other microalgae applying a high N:P ratio. • Complete removal of nitrogen and phosphorus from agricultural runoff was achieved. • NaHCO 3 addition was needed to reach a minimum alkalinity to produce PHB. • Carbohydrates accumulation of 69% VSS was obtained adding only CO 2. The present work evaluated polyhydroxybutyrate (PHB) and carbohydrates production by wastewater borne cyanobacteria at demonstrative-scale (three photobioreactors (PBR) of 11.7 m3 each), using agricultural runoff as feedstock. Agricultural runoff was fed to PBR1, which was devoted to cyanobacteria selection and biomass growth. In PBR2, inorganic carbon was added in a feast and famine regime to favour PHB-accumulating microorganisms. Finally, inorganic carbon was continuously added in PBR3 to boost PHB accumulation. A high removal efficiency of 95% and 99% for total nitrogen and phosphorus was obtained, respectively. Cyanobacteria were successfully selected and outcompeted green microalgae. Results suggested that a minimum inorganic carbon concentration was needed to accumulate PHB while carbohydrates were accumulated only with CO 2 additions. Maximum concentrations of 4.5% VSS and 69% VSS for PHB and carbohydrates were obtained. Overall, this study shows at demonstrative-scale the potential of cyanobacteria to produce PHB within a wastewater biorefinery concept. And it gives insight on the strategies needed to produce PHB with cyanobacteria at massive scale. [ABSTRACT FROM AUTHOR]
Copyright of Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B is the property of Elsevier B.V. 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: Bioremediation of agricultural runoff and biopolymers production from cyanobacteria cultured in demonstrative full-scale photobioreactors.
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  Data: <searchLink fieldCode="AR" term="%22Rueda%2C+Estel%22">Rueda, Estel</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22García-Galán%2C+María+Jesús%22">García-Galán, María Jesús</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ortiz%2C+Antonio%22">Ortiz, Antonio</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Uggetti%2C+Enrica%22">Uggetti, Enrica</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Carretero%2C+Javier%22">Carretero, Javier</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22García%2C+Joan%22">García, Joan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Díez-Montero%2C+Rubén%22">Díez-Montero, Rubén</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> ruben.diez.montero@upc.edu</i>
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  Data: *<searchLink fieldCode="DE" term="%22Agricultural+pollution%22">Agricultural pollution</searchLink><br />*<searchLink fieldCode="DE" term="%22Bioremediation%22">Bioremediation</searchLink><br />*<searchLink fieldCode="DE" term="%22Cyanobacteria%22">Cyanobacteria</searchLink><br />*<searchLink fieldCode="DE" term="%22Microalgae%22">Microalgae</searchLink><br /><searchLink fieldCode="DE" term="%22Photobioreactors%22">Photobioreactors</searchLink><br /><searchLink fieldCode="DE" term="%22Carbohydrates%22">Carbohydrates</searchLink>
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  Data: • Full-scale photobioreactors were tested for PHB production by cyanobacteria. • Cyanobacteria were selected over other microalgae applying a high N:P ratio. • Complete removal of nitrogen and phosphorus from agricultural runoff was achieved. • NaHCO 3 addition was needed to reach a minimum alkalinity to produce PHB. • Carbohydrates accumulation of 69% VSS was obtained adding only CO 2. The present work evaluated polyhydroxybutyrate (PHB) and carbohydrates production by wastewater borne cyanobacteria at demonstrative-scale (three photobioreactors (PBR) of 11.7 m3 each), using agricultural runoff as feedstock. Agricultural runoff was fed to PBR1, which was devoted to cyanobacteria selection and biomass growth. In PBR2, inorganic carbon was added in a feast and famine regime to favour PHB-accumulating microorganisms. Finally, inorganic carbon was continuously added in PBR3 to boost PHB accumulation. A high removal efficiency of 95% and 99% for total nitrogen and phosphorus was obtained, respectively. Cyanobacteria were successfully selected and outcompeted green microalgae. Results suggested that a minimum inorganic carbon concentration was needed to accumulate PHB while carbohydrates were accumulated only with CO 2 additions. Maximum concentrations of 4.5% VSS and 69% VSS for PHB and carbohydrates were obtained. Overall, this study shows at demonstrative-scale the potential of cyanobacteria to produce PHB within a wastewater biorefinery concept. And it gives insight on the strategies needed to produce PHB with cyanobacteria at massive scale. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B is the property of Elsevier B.V. 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: 10.1016/j.psep.2020.03.035
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 241
    Subjects:
      – SubjectFull: Agricultural pollution
        Type: general
      – SubjectFull: Bioremediation
        Type: general
      – SubjectFull: Cyanobacteria
        Type: general
      – SubjectFull: Microalgae
        Type: general
      – SubjectFull: Photobioreactors
        Type: general
      – SubjectFull: Carbohydrates
        Type: general
    Titles:
      – TitleFull: Bioremediation of agricultural runoff and biopolymers production from cyanobacteria cultured in demonstrative full-scale photobioreactors.
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            NameFull: Rueda, Estel
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            NameFull: García-Galán, María Jesús
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            NameFull: Uggetti, Enrica
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            NameFull: Carretero, Javier
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            NameFull: García, Joan
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            NameFull: Díez-Montero, Rubén
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            – D: 01
              M: 07
              Text: Jul2020
              Type: published
              Y: 2020
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              Value: 139
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            – TitleFull: Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B
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