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http://dx.doi.org/10.12652/Ksce.2011.31.2B.187

Removal of Nitrate Nitrogen for Batch Reactor by ZVI Bipolar Packed Bed Electrolytic Cell  

Jeong, Joo Young (한양대학교 건설환경공학과)
Park, Jeong Ho ((주)한라OMS 설계팀)
Choi, Won Ho (한양대학교 건설환경공학과)
Park, Joo Yang (한양대학교 건설환경공학과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.31, no.2B, 2011 , pp. 187-192 More about this Journal
Abstract
Nitrate nitrogen is common contaminant in groundwater aquifers, its concentration is regulated many countries below 10 mg/L as N (As per WHO standards) in drinking water. An attempt was made to get optimal results for the treatment of nitrate nitrogen in groundwater by conducting various experiments by changing the experimental conditions for ZVI bipolar packed bed electrolytic cell. From the experimental results it is evident that the nitrate nitrogen removal is more effective when the reactor conditions are maintained in acidic range but when the acidic environment changes to alkaline due to the hydroxide formed during the process of ammonia nitrogen there by increasing the pH reducing the hydrogen ions required for reduction which leads to low effectiveness of the system. In the ZVI bipolar packed bed electrolytic cell, the packing ratio of 0.5~1:1 was found to be most effective for the treatment of nitrate nitrogen because ZVI particles are isolated and individual particle act like small electrode with low packing ratio. It is seen that formation of precipitate and acceleration of clogging incrementally for packing ratio more than 2:1, decreasing the nitrate nitrogen removal rate. When the voltage is increased it is seen that kinetics and current also increases but at the same time more electric power is consumed. In this experiment, the optimum voltage was determined to be 50V. At that time, nitrate nitrogen was removed by 94.9%.
Keywords
bipolar electrolytic cell; zero valent iron (ZVI); nitrate nitrogen; electrochemistry;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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