Environmental pollution due to plastic wastes and untreated wastewater (WW) discharge is a critical concern. Developing a system that combines plasticized material for a domestic WW treatment coupled with an energy generation seems sustainable. A G-plasticized magnetic starch-based Fe3O4 clay biopolymer nanocomposite (PNC) was synthesized to remove phosphate from the aqueous solution through batch adsorption experiments. The adsorption capacity increased with increasing adsorbent dose and decreased with an increase in phosphate concentration. The synthesized PNC effectively raised the constituent optimum phosphate ion adsorption pH from acidic (pH = 3, 3.12 mg P/g) to slightly acidic (pH = 6, 2.31 mg P/g). In addition, the phosphate removal efficiency of PNC (45%) was comparable to CIONP (58%) under an initial 2 mg P/L. The adsorbents adsorption kinetics and isotherm studies best described by the pseudo-second-order and Freundlich model, respectively. Therefore, the adsorption mechanisms mainly described by electrostatic and ion exchange. In this study, a novel fragmented anode biofilm-microbial fuel cell (FAB-MFC) reactor was invented for the first time to the best of authorsâ€™ knowledge and evaluated for domestic WW treatment. A microbial electrode jacket dish (MEJ-dish) was developed to produce hybrid dimension (HD) microbial electrode and boost anode biofilm growth. It was operated in fed-batch flow mode at 1-3 days of HRT with 755 mg/L CODIN and 0.76 kg-COD/m3/d. The study includes first the FAB optimization study followed by anaerobic-MFC and aerobic-MFC integrated systems. The treatment system with MEJ+ (FAB) and MEJ- (MFC) anode are called FAB-MFC (FAB+) and MFC, respectively. Due to HD, fragmented variable anode biofilm thickness was observed in FAB+ than MFC. The FAB+ technique increases the anode biofilm thickness ~5 times than MFC. All FAB+ integrated systems reduced voltage drop relative to MFC. FAB reduces voltage drops better than MFC in anaerobic-MFC from 6-20 mV and aerobic-MFC from 35-47 mV at 1 kÎ© external load. The highest power density was achieved by FAB in anaerobic-MFC (FAB = 104 mW/m2, MFC = 98 mW/m2) and aerobic-MFC integrated system (FAB = 59 mW/m2, MFC = 42 mW/m2). The Î”COD and CE between FAB and MFC could not be concluded because both setups were inserted in the same reactor. The integrated system COD removal (78-97%) was higher than the solitary MFC treatment (68-78%). The study findings support, the FAB+ integrated system could be used for real application and improve performance. The FAB optimization study showed that the overall voltage generated was significantly higher in FAB-MFC than MFC within limited pH (6.5-7.5); relatively, COD removal was enhanced within a broader pH range (6.5-8.5). It supports the conclusion that FAB anode biofilms were vital for COD removal, and there might be a mutualism even though not participate in voltage generation. A biofilm was sampled from the FAB+ and MFC electrode for molecular assay. The 16S rRNA sequence revealed that the methanogenic bacteria were (7%) less in FAB-MFC than MFC system. The observed dominant phyla were Proteobacteria, Firmicutes, Euryarchaeota, and Planctomycetes. FAB could provide a new flexible technique to manage the anode surface arearnivrnand biofilm thickness. The developed FAB-MFC integrated system and G-plasticized composite are reproducible and applied for domestic WW treatment and bioelectricity generation.