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Título: Nitrous Oxide Abatement Coupled with Biopolymer Production As a Model GHG Biorefinery for Cost-Effective Climate Change Mitigation
Autor: Frutos, Osvaldo D.
Cortes, Irene
Cantera Ruiz de Pellón, Sara
Arnaiz, Esther
Lebrero Fernández, Raquel
Muñoz Torre, Raúl
Año del Documento: 2017
Editorial: American Chemical Society
Descripción: Producción Científica
Documento Fuente: Environmental Science & Technology, 2017, 51 (11), pp 6319–6325
Resumen: N2O represents ∼6% of the global greenhouse gas emission inventory and the most important O3-depleting substance emitted in this 21st century. Despite its environmental relevance, little attention has been given to cost-effective and environmentally friendly N2O abatement methods. Here we examined, the potential of a bubble column (BCR) and an internal loop airlift (ALR) bioreactors of 2.3 L for the abatement of N2O from a nitric acid plant emission. The process was based on the biological reduction of N2O by Paracoccus denitrificans using methanol as a carbon/electron source. Two nitrogen limiting strategies were also tested for the coproduction of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) coupled with N2O reduction. High N2O removal efficiencies (REs) (≈87%) together with a low PHBV cell accumulation were observed in both bioreactors in excess of nitrogen. However, PHBV contents of 38–64% were recorded under N limiting conditions along with N2O-REs of ≈57% and ≈84% in the ALR and BCR, respectively. Fluorescence in situ hybridization analyses showed that P. denitrificans was dominant (>50%) after 6 months of experimentation. The successful abatement of N2O concomitant with PHBV accumulation confirmed the potential of integrating biorefinery concepts into biological gas treatment for a cost-effective GHG mitigation.
Palabras Clave: Emisiones de Gas
Medio ambiente
Revisión por Pares: SI
DOI: http://dx.doi.org/10.1021/acs.est.7b00643
Patrocinador: Ministerio de Economía, Industria y Competitividad (Proyect CTM2015-70442-R and Red NOVEDAR CTQ2014-51693-REDC)
Version del Editor: http://pubs.acs.org/doi/abs/10.1021/acs.est.7b00643
Idioma: eng
URI: http://uvadoc.uva.es/handle/10324/23524
Derechos: info:eu-repo/semantics/openAccess
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