Fig. 4From: A novel fragmented anode biofilm microbial fuel cell (FAB–MFC) integrated system for domestic wastewater treatment and bioelectricity generationOperation mechanisms for a anaerobic-MFC and b aerobic-MFC system. Within each system, MFC-1 is considered as a direct-fed MFC (control) or standalone system, whereas the MFC-2 and -3 are integrated systems. The arrows indicate the water flow pathBack to article page