摘要
Experimental results of a denitrification process which is driven and controlled by the electric current are demonstrated in this paper. Hydrogen produced from a carbon cathode by denitrifying microorganisms adhered to the cathode surface was used to reduce nitrate to nitrogen gas. The denitrification results have close relationships with materials and structures of electrodes applied. The experimental results showed that denitrification can proceed steadily and efficiently by using carbon black as anode material, and surface roughened graphite can adhere much more biomass. The estimated energy required to remove 20mg nitrate nitrogen from 1 liter water is about 1.20×10 -4 kWh.
Experimental results of a denitrification process which is driven and controlled by the electric current are demonstrated in this paper. Hydrogen produced from a carbon cathode by denitrifying microorganisms adhered to the cathode surface was used to reduce nitrate to nitrogen gas. The denitrification results have close relationships with materials and structures of electrodes applied. The experimental results showed that denitrification can proceed steadily and efficiently by using carbon black as anode material, and surface roughened graphite can adhere much more biomass. The estimated energy required to remove 20mg nitrate nitrogen from 1 liter water is about 1.20×10 -4 kWh.
