Denitrification coupled with methane anoxic oxidation and microbial community involved identification

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dc.creatorCuba, Renata Medici Frayne
dc.creatorDuarte, Iolanda Cristina
dc.creatorHoffmann, Nora Katia Saavedra del Aguila
dc.creatorVaresche, Maria Bernadete Amâncio
dc.creatorForesti, Eugenio
dc.date.accessioned2022-07-01T15:08:58Z
dc.date.available2022-07-01T15:08:58Z
dc.date.issued2011-02
dc.description.abstractIn this work, the biological denitrification associated with anoxic oxidation of methane and the microbial diversity involved were studied. Kinetic tests for nitrate (NO3 -) and nitrite (NO2 -) removal and methane uptake were carried out in 100 mL batch reactors incubated in a shaker (40 rpm) at 30 oC. Denitrificant/methanotrophic biomass was taken from a laboratory scale reactor fed with synthetic nitrified substrates (40 mgN L-1 of NO3 - and subsequently NO2 -) and methane as carbon source. Results obtained from nitrate removal followed a first order reaction, presenting a kinetic apparent constant (kNO3)) of 0.0577±0.0057d-1. Two notable points of the denitrification rate (0.12gNO3 --N g-1 AVS d-1 and 0.07gNO3 --N g-1 AVS d-1) were observed in the beginning and on the seventh day of operation. When nitrite was added as an electron acceptor, denitrification rates were improved, presenting an apparent kinetic constant (kNO2) of 0.0722±0.0044d-1, a maximum denitrification rate of 0.6gNO2 --N g-1AVS d-1, and minimum denitrification rate of 0.1gNO2 --N g-1AVS d-1 at the beginning and end of the test, respectively. Endogenous material supporting denitrification and methane concentration dissolved in the substrate was discarded from the control experiments in the absence of methane and seed, respectively. Methylomonas sp. was identified in the reactors fed with nitrate and nitrite as well as uncultured bacterium.pt_BR
dc.identifier.citationCUBA, Renata Medici Frayne et al. Denitrification coupled with methane anoxic oxidation and microbial community involved identification. Brazilian Archives of Biology and Technology, Curitiba, v. 54, n. 1, p. 173-182, Jan./Feb. 2011.  pt_BR
dc.identifier.doihttps://doi.org/10.1590/S1516-89132011000100022
dc.identifier.issn1516-8913
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/20900
dc.language.isoengpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentEscola de Engenharia Civil e Ambiental - EECA (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectDenitrificationpt_BR
dc.subjectMethylomonas sppt_BR
dc.subjectMethane oxidationpt_BR
dc.titleDenitrification coupled with methane anoxic oxidation and microbial community involved identificationpt_BR
dc.typeArtigopt_BR

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