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TitleAcceleration of methane production by carbon nanotubes
Author(s)Salvador, Andreia F.
Martins, Gilberto
Melle-Franco, Manuel
Serpa, Ricardo
Stams, Alfons Johannes Maria
Cavaleiro, Ana Júlia
Pereira, M. A.
Pereira, Luciana
Soares, Olívia S. G. P.
Ramalho, P. S. F.
Pereira, Manuel F. R.
Alves, M. M.
Issue date6-Jul-2017
CitationSalvador, Andreia F.; Martins, Gilberto; Melle-Franco, Manuel; Serpa, Ricardo; Stams, A. J. M.; Cavaleiro, Ana Júlia; Pereira, M. Alcina; Pereira, Luciana; Soares, Olívia S. G. P.; Ramalho, P. S. F.; Pereira, Manuel F. R.; Alves, M. Madalena, Acceleration of methane production by carbon nanotubes. Book of Abstracts of CEB Annual Meeting 2017. Braga, 6 July, 12, 2017. ISBN: 978-989-97478-8-3
Abstract(s)[Excerpt] Carbon nanotubes and other conductive materials have been found to influence the rates of several anaerobic reactions. A range of different conductive carbon materials (CM) were reported to enhance methane production by anaerobic microbial communities. In most studies, the improvement of the overall process is attributed to the ability of these compounds to promote direct interspecies electron transfer (DIET) between bacteria, degrading more complex substrates, and methanogens, producing methane. The occurrence of DIET in the majority of these systems is not, however, proved and the effect of such conductive compounds on the activity of individual members, inside complex microbial communities, was never investigated. Thus, we herein present the results obtained when incubating pure cultures of methanogens, without any other microbial partner, in the presence of increasing concentrations of carbon nanotubes (CNT). Methane production from acetate, by the acetoclastic methanogens Methanosaeta concilii and Methanosarcina mazei, and from hydrogen plus carbon dioxide, by the hydrogenotrophic methanogens Methanospirillum hungatei and Methanobacterium formicicum, was accelerated, up to 17 times, in the presence of CNT [1]. Physical/chemical properties of the growth media changed in the presence of CNT, with redox potential decreasing with increasing CNT concentrations, and thus favouring methanogenesis. These findings show that CNT influences the microbial activity of methanogens in pure cultures and most likely this effect is extended to methanogens in complex communities as well, occurring in anaerobic bioreactors and in the environment. [...]
DescriptionBook of Abstracts of CEB Annual Meeting 2017
Publisher version
AccessOpen access
Appears in Collections:CEB - Resumos em Livros de Atas / Abstracts in Proceedings

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