Optimization for Removal of Nitrogen Using Non-consumable Anode Electrodes 


Vol. 28,  No. 4, pp. 309-315, Dec.  2022
10.7464/ksct.2022.28.4.309


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  Abstract

Research was conducted to derive the optimal operation conditions and the optimal cathode for using a DSA electrode as an anode to minimize electrode consumption during the removal of nitrogen from wastewater by the electro-chemical method. Of the various electrodes tested as cathodes, brass was determined to be the optimal electrode. It had the highest NO3-N removal rate and the lowest concentration of residual NH3-N, a by-product when Cl is present in the solution. Investigating the effect of current density found that when the initial concentration of NO3-N was 50 mg L-1, the optimal current density was 15 mA cm-2. In addition, current densities above 15 mA cm-2 did not significantly affect the NO3-N removal rate. The effect of electrolytes on removing NO3-N and minimizing NH3-N was investigated by using Na2SO4 and NaCl as electrolytes and varying the reaction times. When Na2SO4 and NaCl are mixed at a ratio of 1.0 g L-1 to 0.5 g L-1 and reacted for 90 min at a current density of 15 mA cm-2 and an initial NO3-N concentration of 50 mg L-1, the removal rate of NO3-N was about 48% and there was no residual NH3-N. On the other hand, when using only 1.5 g L-1 of NaCl as an electrolyte, the removal rate of NO3-N was the highest at about 55% and there was no residual NH3-N.

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  Cite this article

[IEEE Style]

K. HS and K. YH, "Optimization for Removal of Nitrogen Using Non-consumable Anode Electrodes," Clean Technology, vol. 28, no. 4, pp. 309-315, 2022. DOI: 10.7464/ksct.2022.28.4.309.

[ACM Style]

Kim HS and Kim YH. 2022. Optimization for Removal of Nitrogen Using Non-consumable Anode Electrodes. Clean Technology, 28, 4, (2022), 309-315. DOI: 10.7464/ksct.2022.28.4.309.

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

한국연구재단 등재학술지