The potential of electrotrophic denitrification coupled with sulfur recycle in MFC and its responses to COD/SO ratios.

Electrotrophic denitrification is a promising novel nitrogen removal technique. In this study, the performance and the mechanism of electrotrophic denitrification coupled with sulfate-sulfide cycle were investigated under different anodic influent COD/SO ratios. The results showed that electrotrophic denitrification contributed to more than 22% total nitrogen removal in cathode chamber.