Both the anode and the cathode had liquid
volumes of 1.1 ± 0.09 L while the total liquid volume of each of
the four CW-MFCs was 8.1 ± 0.12 L. The four arrangements served
to determine the optimum architecture and operation to reduce
the internal resistance by minimizing the electrode spacing and/
or increasing the amount of O2 available for cathodic reactions.