Exploring microbial dynamics in a pilot-scale microalgae raceway fed with urban wastewater: insights into the effect of operational variables

dc.contributor.authorNordio, R.
dc.contributor.authorBelachqer-El Attar, S.
dc.contributor.authorClagnan, E.
dc.contributor.authorSánchez-Zurano, A.
dc.contributor.authorPichel, N.
dc.contributor.authorViviano, E.
dc.contributor.authorAdani, F.
dc.contributor.authorGuzmán, J.L.
dc.contributor.authorAcien, G.
dc.date.accessioned2025-07-29T10:30:21Z
dc.date.available2025-07-29T10:30:21Z
dc.date.issued2024-09-06
dc.description.abstractMicroalgae-based wastewater treatment is a promising technology efficient for nutrient recycling and biomass production. Studies continuously optimize processes to reduce costs and increase productivity. However, changes in the operational conditions affect not only biomass productivity but the dynamics of the overall microbial community. This study characterizes a microalgae culture from an 80 m2 pilot-scale raceway reactor fed with untreated urban wastewater. Operational conditions such as pH, dissolved oxygen control strategies (On-off, PI, Event-based, no control), and culture height were varied to assess microbial population changes. Results demonstrate that increased culture height significantly promotes higher microalgal and bacterial diversity. pH, dissolved oxygen and culture height highly affects nitrifying bacteria activity and nitrogen accumulation. Furthermore, the system exhibited high disinfection capability with average Logarithmic Reduction Values (LRV) of 3.36 for E. coli and 2.57 for Clostridium perfringens. Finally, the fungi species detected included Chytridiomycota and Ascomycota, while purple photosynthetic bacteria were also found in significant abundance within the medium.
dc.identifier.citationR. Nordio, S. Belachqer-El Attar, E. Clagnan, A. Sánchez-Zurano, N. Pichel, E. Viviano, F. Adani, J.L. Guzmán, G. Acien, Exploring microbial dynamics in a pilot-scale microalgae raceway fed with urban wastewater: insights into the effect of operational variables. Journal of Environmental Management 369 (2024), 122385
dc.identifier.doihttps://doi.org/10.1016/j.jenvman.2024.122385
dc.identifier.issn0301-4797
dc.identifier.urihttps://hdl.handle.net/10115/96077
dc.language.isoen
dc.publisherElsevier
dc.rights.accessRightsinfo:eu-repo/semantics/closedAccess
dc.subjectmicrobial dynamics
dc.subjectwastewater-fed
dc.titleExploring microbial dynamics in a pilot-scale microalgae raceway fed with urban wastewater: insights into the effect of operational variables
dc.typeArticle

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