Denitrification in Microbial Fuel Cells Using Granular Activated Carbon as an Effective Biocathode

Nitrate (NO3−-N) and nitrites (NO2−-N) are common pollutants in various water bodies causing serious threats not only to aquatic, but also animals human beings. In this study, we developed a strategy for efficiently reducing nitrates microbial fuel cells (MFCs) powered by granular activated carbon (GAC)-biocathode. GAC was acclimatizing enriching denitrifying bacteria under redox potential (0.3 V) generated from MFCs. Thus, using the formed GAC-biocathode continued study their effect on denitrification with different cathode materials circulation speeds The its excellent capacitive property can actively reduce nitrate over thirty days irrespective of material used. stirring speed showed steady growth generation 0.25 V 0.33 V. A rapid lag phase observed when new used enriched GAC. While slow seen stainless-steel replaced. These observations that effective storage supply electrons plays crucial role reduction process Electrochemical analysis properties studied electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), zeta distinct abiotic biocathode conditions. We found enrichment electrotrophic facilitates direct electron transfer chamber NO3−-N MFCs as scanning microscopy.