Improvement of power generation using Shewanella putrefaciens mediated bioanode in a single chambered microbial fuel cell: Effect of different anodic operating conditions

Soumya Pandit, Santimoy Khilari, Shantonu Roy, Debabrata Pradhan, Debabrata Das

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

Three different approaches were employed to improve single chambered microbial fuel cell (sMFC) performance using Shewanella putrefaciens as biocatalyst. Taguchi design was used to identify the key process parameter (anolyte concentration, CaCl2 and initial anolyte pH) for maximization of volumetric power. Supplementation of CaCl2 was found most significant and maximum power density of 4.92W/m3 was achieved. In subsequent approaches, effect on power output by riboflavin supplementation to anolyte and anode surface modification using nano-hematite (Fe2O3) was observed. Volumetric power density was increased by 44% with addition of 100nM riboflavin to anolyte while with 0.8mg/cm2 nano-Fe2O3 impregnated anode power density and columbic efficiency increased by 40% and 33% respectively. Cyclic voltammetry revealed improvement in electrochemical activity of Shewanella with nano-Fe2O3 loading and electrochemical impedance depicted inverse relationship between charge transfer resistance and nano-Fe2O3 loading. This study suggests anodic improvement strategies for maximization of power output.

Original languageEnglish
Pages (from-to)451-457
Number of pages7
JournalBioresource Technology
Volume166
DOIs
StatePublished - 1 Jan 2014
Externally publishedYes

Keywords

  • Nano hematite
  • Riboflavin
  • Shewanella putrefaciens
  • Single chambered MFC
  • Taguchi optimization

ASJC Scopus subject areas

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

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