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Título
Multi-production of high added market value metabolites from diluted methane emissions via methanotrophic extremophiles
Autor
Año del Documento
2018
Editorial
Elsevier
Descripción
Producción Científica
Documento Fuente
Bioresource Technology, 2018, Volume 267, Pages 401-407
Abstract
This study constitutes the first-proof-of-concept of a methane biorefinery based on the multi-production of high profit margin substances (ectoine, hydroxyectoine, polyhydroxyalkanoates (PHAs) and exopolysaccharides (EPS)) using methane as the sole carbon and energy source. Two bubble column bioreactors were operated under different magnesium concentrations (0.2, 0.02 and 0.002 g L−1) to validate and optimize this innovative strategy for valorization of CH4 emissions. High Mg2+ concentrations promoted the accumulation of ectoine (79.7–94.2 mg g biomass−1), together with high hydroxyectoine yields (up to 13 mg g biomass−1) and EPS concentrations (up to 2.6 g L culture broth−1). Unfortunately, PHA synthesis was almost negligible (14.3 mg L−1) and only found at the lowest Mg2+ concentration tested. Halomonas, Marinobacter, Methylophaga and Methylomicrobium, previously described as ectoine producers, were dominant in both bioreactors, Methylomicrobium being the only described methanotroph. This study encourages further research on CH4 biorefineries capable of creating value out of GHG mitigation.
Palabras Clave
Biorefinería CH4
CH4-biorefinery
Metano
Methane
ISSN
0960-8524
Revisión por pares
NO
Patrocinador
Ministerio de Economía, Industria y Competitividad (Project CTM2015-70442-RNOVEDAR)
Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. E-47-2014-0140696UIC71)
Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. E-47-2014-0140696UIC71)
Version del Editor
Idioma
eng
Derechos
openAccess
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