“…Thus, according to the EET mechanism employed by the biofilm, different behaviors are expected. Systematically, the models available in the literature state that the biological reaction can be described by a dual limitation relationship, which involves the substrate concentration and the contraction or the electric potential of the EET mechanism (Picioreanu et al, 2007, Marcus et al, 2007, Pinto et al, 2010Oliveira et al, 2013b). The EET is modeled according to the mechanism used by the exoelectrogenic bacteria: If the transport is done by mediators, it can be modeled by applying Fick's law (Picioreanu et al, 2007(Picioreanu et al, , 2010 or, if transport is by conduction through the solid components of the biofilm, it can be modeled by applying Ohm's law (Marcus et al, 2007).…”