For the validation experiments, two independent experiments
in duplicates were carried out to validate the model predictions.
Each validation experiment was carried out in the two identical
SMFCs with same operating conditions. SMFC-1 and SMFC-2 were
operated at a pH of 8.5, distance between electrodes at 90 cm and
external resistance of 0 . Similarly, SMFC-3 and SMFC-4 were
operated at a pH of 7.6, distance between electrodes at 100 cm and
external resistance of 52 .