Three (3) two-chambered microbial fuel cells (MFCs) were made for generation of the electricity from wastewater treatment, and called MFCs (A), (B), and (C), respectively. Wastewater filled up at the anode chamber and cathode chamber operated under aerobic condition by using above external resistance for all three (3) MFCs. Anode chamber of all the MFCs (A), (B), and (C) inoculated with anaerobic, microaerophile, and aerobic bacterial, while the separator was selected with non-porous membranes for MFC (C) and (B) and porous membrane for MFC (A). Which MFC is assumed to have the best result for wastewater treatment?