Enhancing the Electricity Generation and Nitrate Removal of Microbial Fuel Cells With a Novel Denitrifying Exoelectrogenic Strain EB-1

This study isolates and characterizes Mycobacterium sp. EB-1, a novel denitrifying exoelectrogenic bacterium capable of simultaneous nitrate removal and electricity generation in microbial fuel cells. The strain achieves a maximum power density of 0.84 W/m² through direct electron transfer and removes nitrate at 0.66 kg N/m³/d without inhibition of voltage output, demonstrating that concurrent denitrification and anode respiration is electron-donor limited rather than system-inhibited. The work expands the known diversity of exoelectrogens and shows promise for integrated energy recovery and wastewater treatment.

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