Fig. 4.

Normalised data of the electrochemical characterisation results. Power curves of the matured SSM-MFCs normalised by the total volume of electrolyte (a) and by the cathode wet surface area (b). Normalisation of cathode polarisation curves by the total volume of electrolyte (c) and by the cathode wet surface area (d). Normalisation of anode polarisation curves by the total volume of electrolyte (e) and by the cathode wet surface area (f). Green, red and blue curves stand for the 1 cm, 2 cm and 3 cm conditions, respectively conditions A, B and C. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)