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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/30103

    Título
    Biogas-based polyhydroxyalkanoates production by Methylocystis hirsuta: A step further in anaerobic digestion biorefineries
    Autor
    López Alonso, Juan CarlosAutoridad UVA Orcid
    Arnáiz, Esther
    Merchán Catalina, Laura
    Lebrero Fernández, RaquelAutoridad UVA Orcid
    Muñoz Torre, RaúlAutoridad UVA Orcid
    Año del Documento
    2018
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Chemical Engineering Journal, Volume 333, 2018, Pages 529-536
    Abstract
    The potential of biogas (with and without H2S) and volatile fatty acids (VFAs) to support microbial growth and accumulation of polyhydroxyalkanoates (PHAs) in type II methanotrophs was evaluated batchwise under aerobic conditions. Methylocystis hirsuta was able to grow on artificial biogas (70% CH4, 29.5% CO2, 0.5% H2S) and accumulate PHA up to 45 ± 1% (wt.%) under N-limited conditions. The presence of CO2 and H2S did not significantly influence the growth and PHA synthesis in M. hirsuta compared to control tests provided with pure CH4 at similar concentrations. Likewise, the addition of VFAs to the cultivation broth at initial concentrations of 100–200 mg L−1 did not hamper the growth of this strain on artificial biogas. Indeed, the addition of 10% extra carbon in the form of individual VFAs resulted in an increase in the maximum PHA yield and final PHA content up to 0.45–0.63 gPHA gSubstrate 1 and 48–54% (wt.%), respectively, at the expense of a higher energy demand. Valeric acid supplementation supported the highest 3-hydroxyvalerate content (13.5%) within the biocomposite. In this context, this study demonstrated for the first time that 3-hydroxyvalerate synthesis by M. hirsuta did not depend on CH4 assimilation.
    Palabras Clave
    Biorrefinería
    Metano
    Bio-refinery
    Methane
    Revisión por pares
    SI
    DOI
    10.1016/j.cej.2017.09.185
    Patrocinador
    Ministerio de Economía, Industria y Competitividad (Proyect CTM2015-70442-R and Red NOVEDAR)
    Junta de Castilla y León (UIC71)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S138589471731690X
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/30103
    Derechos
    openAccess
    Collections
    • DEP48 - Artículos de revista [265]
    • GTA - Artículos de revista [41]
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    CEJ-D-17-06622R1.pdf
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    Attribution-NonCommercial-NoDerivatives 4.0 InternationalExcept where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International

    Universidad de Valladolid

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