In the present study, two novel dominant genera i.e., Advenella kashmirensis and Desulfovibrio aminophilus in consortium, as confirmed by IlluminaMiSeq has been used in the anode side of a microbial fuel cell reactor to find out the influence of cathode environment on cell performance. A model terminal electron acceptor (TEA), KMnO4 at different pHs has been used in the cathode side. An oxidation peak obtained at −0.478 vs Ag/AgCl (−0.281V vs SHE) corresponding to S0/H2S (−0.280V vs SHE) in cyclic voltammogram confirms the complete mineralization of sulphate to biogenic elemental sulphur in accordance with the microbial community. Higher cathodic pH 10 has a detrimental effect on the cell performance as the power density is reduced to half to that for aqKMnO4 (pH=6.86) catholyte. Solution resistance is found to be low for aqKMnO4 (60ohm) and high i.e. 124.5ohm for aqKMnO4 with pH=10, which corroborates to highest power density obtained for aqKMnO4. Buffering of the catholyte provided stability to the system with lowest internal resistance of 40ohm and comparable performance. The highest current density (25A/m3) and power density (7.8W/m3) is obtained with aqueous KMnO4 at pH 6.86. The developed consortium can be successfully utilized in microbial fuel cells for simultaneous electricity generation and wastewater treatment.