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Electricity generation in continuous flow microbial fuel cells (MFCs) with manganese dioxide (MnO2) cathodes

Paper ID Volume ID Publish Year Pages File Format Full-Text
3826 191 2011 6 PDF Available
Title
Electricity generation in continuous flow microbial fuel cells (MFCs) with manganese dioxide (MnO2) cathodes
Abstract

A novel cost-effective cathode catalyst, manganese dioxide (MnO2) featured with a cryptomelane-type octahedral molecular sieve (OMS-2) structure, was examined in continuous flow microbial fuel cells (MFCs). Power generation and organic substrate removal efficiency of two metal ions doped OMS-2 cathodes (cobalt (Co)-OMS-2 and copper (Cu)-OMS-2) were compared with platinum (Pt) cathodes under different hydraulic retention times (HRTs) and chemical oxygen demands (CODs). The 600-h continuous flow tests showed that Cu-OMS-2 MFCs and Co-OMS-2 MFCs achieved the stable power generation of 200 ± 8 mV and 190 ± 5 mV, and were 50–60 mV higher than that of Pt MFCs. The COD removal efficiencies of Cu-OMS-2 MFCs and Co-OMS-2 MFCs were 83–87%, which were 15–19% higher than that of Pt MFCs. The power generation and COD removal efficiency increased with longer HRTs. The Cu-OMS-2 exhibited the highest power density (201 mW/m2) at the COD of 1000 mg/L. However, Co-OMS-2 cathodes had the better performance than Cu-OMs-2 at high COD concentrations of 2000–4000 mg/L, with the power density of 897 mW/m2 and COD removal efficiency of 46%. The continuous flow MFC tests demonstrated that the fast reaction rate of OMS-2 cathodes enhanced power generation and COD removal efficiency, and had a great potential to be applied in real-world wastewater treatment processes.

► Manganese dioxide featured with cryptomelane-type octohedral molecular sieve (OMS-2) structure was used as microbial fuel cells (MFCs) cathode catalysts. ► The novel cost-effective OMS-2 catalysts were examined in continuous flow MFCs.

Keywords
Microbial fuel cells; Continuous flow; Manganese dioxides; Octahedral molecular sieves; Operation condition effect
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Electricity generation in continuous flow microbial fuel cells (MFCs) with manganese dioxide (MnO2) cathodes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 54, Issue 1, 15 March 2011, Pages 10–15
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us