Effects of Operating Parameters on the Removal Performance of Nitrate-nitrogen by Electrodialysis 


Vol. 15,  No. 4, pp. 280-286, Dec.  2009


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  Abstract

To evaluate the feasibility of electrodialysis for nitrate-nitrogen removal from wastewater, the effect of operating parameters on the removal of nitrate-nitrogen was experimentally estimated. The limiting current density (LCD) linearly increased with the nitrate concentration and the flow rate. The time when the nitrate concentration of diluate reached at 20 mg/L was linearly proportional to concentration of diluate, and the concentration of concentrate did not affect the removal rate. Increase in the flow rate gave a positive effect on the removal rate and became insignificant at flow rates greater than 1.6 L/min. The removal rate increased with the applied voltage, but the increment in the removal rate decreased as the applied voltage approached the LCD. From the operation of the electrodialysis module used in this research, the flow rate of 1.6 L/min and the voltage corresponding to the 80~90% of LCD were found be the optimum operating condition for the nitrate removal from highly concentrated nitrate-nitrogen solutions.

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  Cite this article

[IEEE Style]

L. GH and L. G, "Effects of Operating Parameters on the Removal Performance of Nitrate-nitrogen by Electrodialysis," Clean Technology, vol. 15, no. 4, pp. 280-286, 2009. DOI: .

[ACM Style]

Lee GH and Lee G. 2009. Effects of Operating Parameters on the Removal Performance of Nitrate-nitrogen by Electrodialysis. Clean Technology, 15, 4, (2009), 280-286. DOI: .

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

한국연구재단 등재학술지