hree MFCs are operated in continuous mode at 37 C which are named (MFC-A), (MFC-B), and (MFC-C). The synthetic dye wastewater is fed into the anodic chamber with initial concentration dye (0.1 mg/L) along with glucose (0.1 mg/L) as carbon sources for consortium bacteria. The (MFC-A) connected to the resistor at 1 M while the (MFC-B) and (MFC-C) connected at 50 and 25 for 820 hours, respectively.

Based on the polarization curve and power density below; which MFC has the lowest voltage drop and the highest efficiency for biodegradation/oxidation of synthetic dye wastewater and glucose, respectively?