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Paca et al., 2008;

Pesce and Wunderlin, 1997;

Smets et al., 1999). However, due to the electron-deficient property of aromatic rings resulting from the substitution of nitro group, DNT is a biorefractory compound and its biodegradation efficiency is usually not high (Cruz-Uribe and Rorrer, 2006;

Leungsakul et al., 2005;

2006). Electrochemically active bacteria (EAB) are widely present in anoxic environments (Hau and Gralnick, 2007). Since EAB are able to transfer electrons to This article is protected by copyright. All rights reserved extracellular electron acceptors, they are involved in the cycling of iron, manganese, many trace metals, and organic matter in nature, and can be used for environmental remediation (Liu et al., 2002;

Pearce et al., 2006;

Tang et al., 2006;

Truex et al., 1997). Several EAB, including Shewanella putrefaciens CN32, Geobacter metallireducens, Geobacter sulfurreducens and Desulfitobacterium chlororespirans, have been reported to be able to directly reduce nitro-compounds (Kwon and Finneran, 2006;

Kwon and Finneran, 2008;

Luan et al., 2010). These EAB have been found to respire on the various nitrocompounds. As a model EAB, Shewanella oneidensis MR-1 has been used for microbial reduction investigati........