Decoupling of DAMO archaea from DAMO bacteria in a methane-driven microbial fuel cell

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

21 Scopus Citations
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Author(s)

  • Jing Ding
  • Yong-Ze Lu
  • Liang Fu
  • Zhao-Wei Ding
  • Yang Mu
  • Raymond J. Zeng

Detail(s)

Original languageEnglish
Pages (from-to)112-119
Journal / PublicationWater Research
Volume110
Publication statusPublished - 1 Mar 2017

Abstract

Anaerobic oxidation of methane (AOM) contributes significantly to the global methane sink. Previously, studies of anaerobic methanotrophic (ANME) archaea have been limited as they have not been separable from their bacterial partners during the AOM process because of their dependence on the bacteria. A microbial fuel cell (MFC) is a device capable of directly transforming chemical energy to electrical energy via electrochemical reactions involving biochemical pathways. In this study, decoupling of denitrifying anaerobic methane oxidation (DAMO) archaea and DAMO bacteria was investigated in an microbial fuel cell (MFC) using methane as the fuel. The DAMO fuel cell worked successfully but demonstrated weak electrogenic capability with around 25 mV production. After 45 days’ enrichment, the sequencing and fluorescence in situ hybridization results showed the DAMO archaea percentage had increased from 26.96% (inoculum) to 65.77% (electrode biofilm), while the DAMO bacteria percentage decreased from 24.39% to 2.07%. Moreover, the amount of ANME-2d had doubled in the electrode biofilm compared with the inoculum. The sequencing results also showed substantial enrichment of the Ignavibacterium and Geobacter genera. The roles of Ignavibacterium and Geobacter in the MFC system need to be further investigated. Nevertheless, these results illustrate that an MFC device may provide a possible approach to separate DAMO archaea from DAMO bacteria.

Research Area(s)

  • Anaerobic oxidation of methane (AOM), ANME-2d archaea, Decoupling, Denitrifying anaerobic methane oxidation (DAMO), Methane-driven MFC, Purification

Citation Format(s)

Decoupling of DAMO archaea from DAMO bacteria in a methane-driven microbial fuel cell. / Ding, Jing; Lu, Yong-Ze; Fu, Liang; Ding, Zhao-Wei; Mu, Yang; Cheng, Shuk H.; Zeng, Raymond J.

In: Water Research, Vol. 110, 01.03.2017, p. 112-119.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review