3.1 COD Removal Efficiency
During operation, all MFCs were continuously monitored for
waste (as COD) removal to enumerate the potential of fuel cell
to act as wastewater treatment unit. Both domestic wastewater
and dairy wastewater showed its potential for COD removal
indicating the function of microbes, present in wastewaters in
metabolizing the carbon source as electron donors. It is
evident from experimental data that current generation and
COD removal showed relative compatibility. Continuous
COD removal was observed in both MFC-1 and MFC-2
during 12 days of operation. Initially full strength wastewater
was used in the anodic chamber, and then it was replaced by
75% and 50% wastewater concentrations.