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ent rich resource that is currently under-utilized. Conventional aer-obic wastewater treatment methods, such as activated sludge, can consume a significant amount of energy for treatment (0.6 kWh/m3), and typical treatment plants have limited energy recovery (McCarty et al., 2011). Microbial electrochemical technologies (METs), such as microbial electrolysis cells (MECs), have shown great potential for recovering energy from wastewater that can be gan and R e, populate terial and p electrical current, is coupledwith a hydrogen-evolving catho et al., 2005; Rozendal et al., 2006). The reaction is not spont and requires an additional applied potential of 0.11 V, al potentials greater than 0.5 V are typically required due to internal resistance and electrode overpotentials (Logan et al., 2008). A variety of wastewaters have been used in MECs, includin