Application of PVA-PDDA polymer electrolyte composite anion exchange membrane separator for improved bioelectricity production in a single chambered microbial fuel cell

Soumya Pandit, Santimoy Khilari, Kaustav Bera, Debabrata Pradhan, Debabrata Das

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

The present study deals with the preparation and characterization of low cost custom made KOH doped polyvinyl alcohol (PVA)-polydiallyldimethylammonium chloride (PDDA) anion exchange membranes (AEM). The synthesized membrane was used as a separator in single chambered microbial fuel cells (sMFCs). The membranes were characterized in terms of proton conductivity, oxygen diffusion, and ion exchange ability. The performance of sMFCs with newly prepared AEM separator was evaluated with respect to operating voltage and COD removal. Higher volumetric power density was achieved in case of PVA-PDDA composite membrane as compared to PVA-STA cation exchange membrane and commercial Ralex AEM mainly due to low internal resistance and less biofouling. The effect of PDDA content in composite membrane was evaluated in terms of current density and coulombic efficiency. The PDDA blending in membrane had significant influence on the reduction of impedance (improvement in anionic conductivity) and biofouling. A maximum power density of 6.68W/m3 was obtained when Shewanella putrefaciens was used in lactate medium fed sMFC equipped with PVA-PDDA based MCA. Power output increased with membrane cathode assembly (MCA) surface area. An optimized quantity (0.5mg/cm2) of 1% (w/v) PVA solution was found to be effective as suitable binder. PVA-PDDA composite membrane exhibited as a suitable alternative to the costly membrane commonly used in the MFC.

Original languageEnglish
Pages (from-to)138-147
Number of pages10
JournalChemical Engineering Journal
Volume257
DOIs
StatePublished - 1 Dec 2014
Externally publishedYes

Keywords

  • Anion exchange membrane
  • Impedance
  • Ion exchange capacity
  • Membrane electrode assembly
  • Microbial fuel cell
  • Poly vinyl alcohol

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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