Polyaniline on Stainless Steel Fiber Felt as Anodes for Bioelectrodegradation of Acid Blue 29 in Microbial Fuel Cells

This study investigated the advantages of using low-cost polyaniline-fabricated stainless steel fiber felt anode-based microbial fuel cells (PANI-SSFF-MFCs) for azo dye acid blue 29 (AB29) containing wastewater treatment integrated with an aerobic bioreactor. The findings electrochemical impedance spectroscopy (EIS) and polarization studies showed that PANI–SSFF anode considerably decreased MFC internal resistance. highest power density 103 ± 3.6 mW m ?2 was achieved by PANI-SSFF-MFCs a decolorization efficiency 93 3.1% start-up time 13 days. final chemical oxygen demand (COD) removal efficiencies PANI–SSFF–MFC–bioreactor SSFF–MFC–bioreactor set-ups were 92.5 2% 80 2%, respectively. Based on 16S rRNA gene sequencing, substantial community change observed in MFCs. majority sequences from Proteobacteria phylum, accounting 72% 55% PANI–SSFF–anodic biofilm suspension, respectively, 58 45% SSFF–anodic relative abundance seven most abundant genera ( Pseudomonas, Acinetobacter , Stenotrophomonas, Geothrix Dysgonomonas, Shinella Rhizobiales ) higher PANI–SSFF–MFCs (46.1% 55.4% suspension) as compared to SSFF–MFC (43% 40.8% which predominantly contributed AB29 and/or electron transfer. We demonstrate this work consortia acclimated environment PANI-fabricated anodes are capable high rates enhanced electricity production. A combined single-chamber (SMFC)-aerobic bioreactor operation also performed efficient biodegradation AB29.