Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/47410

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dc.contributor.authorMartins, Gilbertopor
dc.contributor.authorSalvador, Andreia Filipa Ferreirapor
dc.contributor.authorMelle-Franco, Manuelpor
dc.contributor.authorSerpa, Ricardopor
dc.contributor.authorStams, Alfons Johannes Mariapor
dc.contributor.authorCavaleiro, Ana Júlia Vianapor
dc.contributor.authorPereira, M. A.por
dc.contributor.authorAlves, M. M.por
dc.date.accessioned2017-11-15T14:48:07Z-
dc.date.available2017-11-15T14:48:07Z-
dc.date.issued2017-05-03-
dc.identifier.citationMartins, Gilberto; Salvador, Andreia F.; Melle-Franco, Manuel; Serpa, Ricardo; Stams, A. J. M.; Cavaleiro, Ana Júlia; Pereira, M. Alcina; Alves, M. Madalena, Effect of carbon nanotubes on methane production in pure cultures of methanogens and in a syntrophic co-culture. ICBM-3 - 3rd International Conference on Biogas Microbiology. No. O40, Wageningen, The Netherlands, 1-3 May, 30-31, 2017.por
dc.identifier.urihttp://hdl.handle.net/1822/47410-
dc.descriptionICBM-3 - 3rd International Conference on Biogas Microbiologypor
dc.description.abstractConductive materials have been reported to enhance methane production by anaerobic microbial communities from a wide diversity of substrates 1 . The mechanisms involved are far from being fully understood. Many studies suggest that these materials facilitate direct interspecies electron transfer (DIET) between electrogenic bacteria and methanogens and that this mechanism is even dominant over interspecies hydrogen and formate transfer 2,3. The effect of conductive materials in pure cultures of methanogens or in co-cultures of typical fatty acid-degrading syntrophs with methanogenic partners was never studied. In this work, the effect of carbon nanotubes (CNT) on the activity of pure cultures of Methanobacterium formicicum, Methanospirillum hungatei, Methanosarcina mazei and Methanosaeta concilii, and in the co-culture of Syntrophomonas wolfei and Methanospirillum hungatei was evaluated. The results showed that CNT affect methane production by methanogens. Initial methane production rate (MPR) increased 17 and 6 times when M. formicicum and M. hungatei were incubated with 5g·L-1 CNT, respectively. M. mazei and M. concilii‘ activities were higher when exposed to CNT concentrations of 0.1 to 1g·L-1 , but lower with 5g·L-1 . Increasing CNT concentrations resulted in more negative redox potentials, which correlated with the increased methanogenic activity. Remarkably, in the absence of a reducing agent, but in the presence of CNT, the MPR was higher than in incubations with reducing agent, while no growth was observed without reducing agent and without CNT. MPR from butyrate increased 1.5 fold in the presence of CNT (5g.L-1 ), showing a positive effect of CNT on the syntrophic coculture. Indications of DIET by the presence CNT were not obtained. Rather, CNT directly affects the activity of methanogens, which creates new opportunities to improve methane production from waste and wastewater in anaerobic digesters.por
dc.language.isoengpor
dc.rightsopenAccesspor
dc.titleEffect of carbon nanotubes on methane production in pure cultures of methanogens and in a syntrophic co-culturepor
dc.typeconferenceAbstractpor
dc.peerreviewedyespor
dc.relation.publisherversionhttps://www.wur.nl/en/show/3rd-International-Conference-on-Biogas-Microbiology-ICBM-3.htmpor
dc.commentsCEB47074por
oaire.citationConferenceDate01 - 03 May 2017por
sdum.event.typeconferencepor
oaire.citationStartPage30por
oaire.citationEndPage31por
oaire.citationIssueO40-
oaire.citationConferencePlaceWageningen, The Netherlandspor
dc.date.updated2017-11-02T15:22:44Z-
dc.description.publicationversioninfo:eu-repo/semantics/publishedVersionpor
sdum.conferencePublicationICBM-3 - 3rd International Conference on Biogas Microbiologypor
Appears in Collections:CEB - Resumos em Livros de Atas / Abstracts in Proceedings

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