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oai:uvadoc.uva.es:10324/235242025-03-26T16:41:31Zcom_10324_1173com_10324_931com_10324_894com_10324_31059com_10324_954col_10324_1371col_10324_31061

Nitrous Oxide Abatement Coupled with Biopolymer Production As a Model GHG Biorefinery for Cost-Effective Climate Change Mitigation Frutos, Osvaldo D. Cortés Martín, Irene Cantera Ruiz De Pellon, Sara Arnáiz, Esther Lebrero Fernández, Raquel Muñoz Torre, Raúl Emisiones de Gas Medio ambiente Producción Científica 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. Ministerio de Economía, Industria y Competitividad (Proyect CTM2015-70442-R and Red NOVEDAR CTQ2014-51693-REDC) 2017-06-19T08:43:26Z 2017-06-19T08:43:26Z 2017 info:eu-repo/semantics/article Environmental Science & Technology, 2017, 51 (11), pp 6319–6325 http://uvadoc.uva.es/handle/10324/23524 10.1021/acs.est.7b00643 Environmental Science & Technology eng http://pubs.acs.org/doi/abs/10.1021/acs.est.7b00643 Attribution-NonCommercial-NoDerivatives 4.0 International info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf American Chemical Society https://uvadoc.uva.es/bitstream/10324/23524/6/Frutos-et-al-2017-Env-Sci-Technol.pdf.jpg Hispana TEXT http://creativecommons.org/licenses/by-nc-nd/4.0/ UVaDOC. Repositorio Documental de la Universidad de Valladolid http://uvadoc.uva.es/handle/10324/23524