“…Calculation of secondary efficiency parameters that involve COD removal presents a drawback because both planktonic and sessile microbial activity are responsible for COD removal, but only the microorganisms attached to the electrode participate in direct electron transfer (Dorazco-Delgado et al, 2021;Valdez-Ojeda et al, 2014), i.e., in electrical current production. For this reason, it is necessary to determine the parameters that reliably describe cell performance.…”