Environmental Science & Technology A-Page Magazine
Vol. 40, Iss. 17

Special Section

Microbial fuel cells

Opening Art
Bruce Logan

The September 1, 2006, issue of Environmental Science & Technology contains a special section on microbial fuel cells.

The feature article presents the basic characteristics of microbial fuel cells and describes their potential applications. The authors conclude that the most immediate application is for wastewater treatment—a process that also generates excess electricity.

In the research section of this issue, the challenges of producing increased power densities and making smaller reactors are reviewed. Several other technical papers address ion transport through membranes used in certain types of microbial fuel cells and factors that affect power densities achieved with reactors that use oxygen, ferricyanide, or iron oxides as the cathode. Although most microbial fuel cells are based on bacterial oxidation of organic substrates, another paper looks at a reactor sustained through bacterial oxidation of sulfides.

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