Effect of the Organic and Nitrogen Removal and Electricity Production on Changing the External Resistor and the Inflow Loading in the Biocathode Microbial Fuel Cell

생물환원전극 미생물연료전지에서 외부저항 및 유입부하에 따른 유기물 및 질소 제거와 전기생산에 미치는 영향

Kim, Jiyeon;Kim, Byunggoon;Kim, Hongsuck;Yun, Zuwhan

  • Received : 2015.07.21
  • Accepted : 2015.09.17
  • Published : 2015.09.30


In order to remove the organic substances and the nitrate-nitrogen contained in wastewater, some researchers have studied the simultaneous removal of organics and nitrogen by using different biocathode microbial fuel cells (MFCs). The operating conditions for removing the contaminants in the MFCs are the external resistances, HRTs, the concentration of the influent wastewater, and other factors. This study aimed to determine the effect of the external resistors and organic loading rates, from the changing HRT, on the removal of the organics and nitrogen and on the production of electric power using the Denitrification Biocathode - Microbial Fuel Cell (DNB-MFC). As regards the results of the study, the removal efficiencies of $SCOD_{Cr}$ did not show any difference, but the nitrate-nitrogen removal efficiencies were increased by decreasing the external resistance. The maximum denitrification rate achieved was $129.2{\pm}13.54g\;NO_3{^-}-N/m^3/d$ in the external resistance $1{\Omega}$, and the maximum power density was $3,279mW/m^3$ in $10{\Omega}$. When the DNB-MFC was operated with increasing influent organic and nitrate loading by reducing the HRTs, the $NO_3{^-}-N$ removal efficiencies were increased linearly, and the maximum nitrate removal rate was $1,586g\;NO^3{^-}-N/m^3/d$ at HRT 0.6 h.


Biocathode microbial fuel cell;Denitrification;External resistance;Influent loading rate;Simultaneous organic and nitrate removal


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