2024-03-28T22:07:22Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/235242021-06-24T07:34:49Zcom_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 Pellón, Sara
Arnáiz, Esther
Lebrero Fernández, Raquel
Muñoz Torre, Raúl
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.
2017-06-19T08:43:26Z
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
http://dx.doi.org/10.1021/acs.est.7b00643
Environmental Science & Technology
eng
http://pubs.acs.org/doi/abs/10.1021/acs.est.7b00643
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 International
American Chemical Society