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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/46466

    Título
    Assessing the influence of the hydraulic retention time and carbon/nitrogen ratio on urban wastewater treatment in a new anoxic-aerobic algal-bacterial photobioreactor configuration
    Autor
    Toledo Cervantes, Alma
    Posadas Olmos, EstherAutoridad UVA
    Bertol, Isabel
    Turiel Santos, Sara
    Alcoceba, Ana
    Muñoz Torre, RaúlAutoridad UVA Orcid
    Año del Documento
    2019
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Algal Research, 2019, vol. 44. 8 p.
    Résumé
    The influence of the hydraulic retention time (HRT) (2 and 4 days) and the carbon/nitrogen ratio (C/N) (7, 8 and 9) of the wastewater on the treatment of synthetic domestic wastewater was evaluated in a new anoxic-aerobic algal-bacterial photobioreactor configuration operated at solids retention time of 10 d by biomass recycling and withdrawal. The removal of chemical oxygen demand remained between 84% and 89% regardless of the operational conditions. However, the decrease in the HRT from 4 to 2 d entailed reductions in the removal of total nitrogen (TN) and P-PO43− from 87 ± 2% to 62 ± 2% and from 22 ± 5% to 11 ± 1%, respectively. On the other hand, the decrease in the C/N ratio of the wastewater from 9 to 8 and 7 at a HRT of 2 d induced TN removals of 62 ± 4% and 48 ± 4%, respectively. In contrast, P-PO43- removals unexpectedly increased from 11 ± 1% at a C/N ratio of 9 to 53 ± 3% and 47 ± 5% at C/N ratios of 8 and 7, respectively. Finally, biomass settling and recycling supported the enrichment of an algal-bacterial population with good settleability characteristics (suspended solids removals in the settler ∼98%), being Chlorella vulgaris the dominant microalga specie at a C/N ratio of 9 which was gradually replaced by Phormidium sp., as a result of the reduction in the C/N ratio of the wastewater.
    Palabras Clave
    Algal-bacterial processes
    Procesos alga-bacteria
    Anoxic-aerobic photobioreactor
    Fotobiorreactor anóxico-aerobio
    Carbon-to-nitrogen ratio
    Relación carbono/nitrógeno
    ISSN
    2211-9264
    Revisión por pares
    SI
    DOI
    10.1016/j.algal.2019.101672
    Patrocinador
    Junta de Castilla y León - Fondo Europeo de Desarrollo Regional (projects CLU-2017-09 and UIC 71)
    CEMIE-Bio (project 247006)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S2211926419302681?via%3Dihub
    Propietario de los Derechos
    © 2019 Elsevier
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/46466
    Tipo de versión
    info:eu-repo/semantics/acceptedVersion
    Derechos
    openAccess
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    • IPS - Artículos de revista [156]
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    Assessing-influence-of-hydraulic-retention.pdf
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    Attribution-NonCommercial-NoDerivatives 4.0 InternacionalExcepté là où spécifié autrement, la license de ce document est décrite en tant que Attribution-NonCommercial-NoDerivatives 4.0 Internacional

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