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Raül Lopéz. Photo.

Raül López I Losada

Doctoral student

Raül Lopéz. Photo.

Metal residues in macroalgae feedstock and implications for microbial fermentation

Author

  • Raül López I Losada
  • Mikołaj Owsianiak
  • Ólafur Ögmundarson
  • Peter Fantke

Summary, in English

Macroalgae cultivation shows potential for the application as emerging feedstock for microbial fermentation to produce biochemicals. However, metal residues in macroalgae might affect the fermentation capacity of relevant microorganisms. This aspect is currently not considered when selecting macroalgae and microorganism species for microbial fermentation. To consider this aspect for selecting viable macroalgae and microorganism species, we link metal exposure in bioreactors from macroalgae residues to ecotoxicological test results for relevant microorganisms. Our results indicate that estimated bioreactor concentrations for most metals are below microorganism effect levels. For copper and hexavalent chromium, however, reactor concentrations might exceed relevant effect levels for at least some considered microorganism species. Adjusting water hardness in the bioreactor as well as selecting algae harvest location and macroalgae species might minimize metal exposure to fermenting microorganisms, in support of optimizing the biorefining process for biochemical production.

Department/s

  • Centre for Environmental and Climate Science (CEC)

Publishing year

2020-10-12

Language

English

Publication/Series

Biomass and Bioenergy

Volume

142

Document type

Journal article

Publisher

Elsevier

Topic

  • Environmental Biotechnology

Keywords

  • Ecotoxicity
  • Macroalgae
  • Biorefinery
  • Metals
  • Microorganisms
  • Bioconcentration

Status

Published

ISBN/ISSN/Other

  • ISSN: 0961-9534