Microbial community structure accompanied with electricity production in a constructed wetland plant microbial fuel cell

Lu Lu, Defeng Xing, Zhiyong Ren

Research output: Contribution to journalArticle

118 Scopus citations

Abstract

(Figure Presented). This study reveals the complex structure of bacterial and archaeal communities associated with a Canna indica plant microbial fuel cell (PMFC) and its electricity production. The PMFC produced a maximum current of 105 mA/m2 by utilizing rhizodeposits as the sole electron donor without any external nutrient or buffer supplements, which demonstrates the feasibility of PMFCs in practical oligotrophic conditions with low solution conductivity. The microbial diversity was significantly higher in the PMFC than non-plant controls or sediment-only controls, and pyrosequencing and clone library reveal that rhizodeposits conversion to current were carried out by syntrophic interactions between fermentative bacteria (e.g., Anaerolineaceae) and electrochemically active bacteria (e.g., Geobacter). Denitrifying bacteria and acetotrophic methanogens play a minor role in organics degradation, but abundant hydrogenotrophic methanogens and thermophilic archaea are likely main electron donor competitors.

Original languageEnglish (US)
Pages (from-to)115-121
Number of pages7
JournalBioresource Technology
Volume195
DOIs
StatePublished - Apr 20 2015

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

Keywords

  • Canna indica
  • Constructed wetland
  • Microbial community structure
  • Plant microbial fuel cell (PMFC)
  • Rhizodeposits

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