RT info:eu-repo/semantics/article
T1 Multi-production of high added market value metabolites from diluted methane emissions via methanotrophic extremophiles
A1 Cantera Ruiz de Pellón, Sara
A1 Sánchez Andrea, Irene
A1 Lebrero Fernández, Raquel
A1 García Encina, Pedro Antonio
A1 Stams, Alfons J.M.
A1 Muñoz Torre, Raúl
K1 Biorefinería CH4
K1 CH4-biorefinery
K1 Metano
K1 Methane
AB 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.
PB Elsevier
SN 0960-8524
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/35160
UL http://uvadoc.uva.es/handle/10324/35160
LA eng
NO Bioresource Technology, 2018, Volume 267, Pages 401-407
NO Producción Científica
DS UVaDOC
RD 25-abr-2024