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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/36737

    Título
    Polyhydroxyalkanoates production from methane emissions in Sphagnum mosses: Assessing the effect of temperature and phosphorus limitation
    Autor
    Pérez Fernández, RebecaAutoridad UVA Orcid
    Casal Martínez, Jesús
    Muñoz Torre, RaúlAutoridad UVA Orcid
    Lebrero Fernández, RaquelAutoridad UVA Orcid
    Año del Documento
    2019
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Science of The Total Environment, Volume 688, 2019, Pages 684-690
    Abstract
    The isolation of highly efficient methanotrophic communities is crucial for the optimization of methane bioconversion into products with a high market value such as polyhydroxyalkanoates (PHA). The research here presented aimed at enriching a methanotrophic consortium from two different inocula (Sphagnum peat moss (Sp) and Sphagnum and activated sludge (M)) able to accumulate PHA while efficiently oxidizing CH4. Moreover, the effect of the temperature and phosphorus limitation on the biodegradation rate of CH4 and the PHA accumulation potential was investigated. Higher CH4 degradation rates were obtained under P availability at increasing temperature (25, 30 and 37 °C). The biomass enriched from the mixed inoculum always exhibited a superior biodegradation performance regardless of the temperature (a maximum value of 84.3 ± 8.4 mg CH4 h−1 g biomass−1 was recorded at 37 °C). The results of the PHB production showed that phosphorus limitation is required to promote PHB accumulation, the highest PHB content being observed with the Sphagnum inoculum at 25 °C (13.6 ± 5.6%). The differential specialization of the microbial communities depending on the enrichment temperature supported the key role of this parameter on the results obtained. In all cases after the completion of the enrichment process and of the P limitation tests, Methylocystis, a type II methanotroph known for its ability to accumulate PHA, was the genus that became dominant (reaching percentages from 16 to 46% depending on the enrichment temperature). Thus, the results here obtained demonstrated for the first time the relevance of the temperature used for the enrichment of the methanotrophic bacteria to boost PHA production yields under P limiting condition, highlighting the importance of optimizing culture conditions to improve the cost-efficiency of bioprocesses based on using methane as the primary feedstock for the PHA industrial market.
    ISSN
    0048-9697
    Revisión por pares
    SI
    DOI
    10.1016/j.scitotenv.2019.06.296
    Patrocinador
    Ministerio de Economía, Industria y Competitividad - FEDER (Project CTM2015-73228-JIN)
    Junta de Castilla y León (programa de apoyo a proyectos de investigación - Ref. UIC 71 and CLU 2017-09)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0048969719328694
    Propietario de los Derechos
    © 2019 Elsevier
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/36737
    Tipo de versión
    info:eu-repo/semantics/submittedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • IPS - Artículos de revista [157]
    • DEP48 - Artículos de revista [265]
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