Fig. 3

A Chronoamperometric curves of three-electrode systems inoculated with the co-culture with CMC (curve a) and without a carbon source (curve b) or inoculated with Geobacter sulfurreducens PCA with CMC (curve c) at a constant potential of 0.3 V. The arrow indicates the replacement of the solution in the reactor with CMC. B Voltage and output power density vs. current density obtained by varying the external circuit resistance; co-culture with CMC as the carbon source