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Anode pretreatment with NH4Cl and HCl improves MFC performance, with stainless steel anode adhered to carbon fiber showing the best results.

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What they did

System
MFC

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Abstract

Electricity can be generated during the wastewater treatment by microbial fuel cell (MFC). Effect of the anode pretreatment method, anode modification and electronic media in anolyte on electricity generation of a single chamber microbial fuel cell (SCMFC) with an air cathode was investigated by performance measurement of the MFC during one cycle of generating electricity. Results show that the discharge time of MFCs with stainless steel anode pretreated by NH4Cl and HCl is longer than that with anode pretreated by the distilled water and NaOH; the performance of MFC with anode pretreated by NH4Cl is the best; comparison with stainless steel anode and adhere activated carbon, the current of MFC with the stainless steel anode adhere the carbon fiber is the maximum and its Coulombic efficiency is the highest; The electricity generation characteristics of the MFC with the anode adhered carbon fiber and pretreated by NH4Cl and the anolyte added the electronic media is the best. The action of the electronic medium and the NH4Cl on the MFC is synergism. It's of great significance that the research results improve the performance of MFC by anode pretreatment.

Key findings

  • Discharge time of MFCs with stainless steel anode pretreated by NH4Cl and HCl is longer than with distilled water and NaOH.
  • MFC with anode pretreated by NH4Cl shows the best performance.
  • Current and Coulombic efficiency of MFC with stainless steel anode adhered to carbon fiber are the highest.
  • Synergistic effect of electronic medium and NH4Cl on MFC performance.

Keywords

AnodeMicrobial fuel cellFaraday efficiencyCathodeDistilled waterWastewater

Identifiers

DOI
10.4028/www.scientific.net/amr.156-157.742
Journal
Advanced Materials Research
Year
2010