| Abstract |
| Electrochemical anodic oxidation was carried out to investigate the efficiency of a lab-scale bipolar packed-bed particles electrode reactor (BPER), using high-strength organic industrial wastewater with a mean COD concentration of 2500 mg/L. Operating variables considered to determine optimal running conditions for the wastewater treatment examined were the packing electrode materials, such as PbO2, MnO2, granular activated carbon and graphite, the current density, the flow rate to the reactor, the temperature and the additives. Results revealed that PbO2 as anodic electrode was more suitable among other materials examined and that the optimal input current density for this process was 2.22 A/d㎡. The total theoretical voltage obtained from the voltage-current curve was 55 V in the reactor and 5.5 V per unit layer bipolar cell. The effect of aqueous solution with added NaCl (17 mM NaCl, pH = 9.00) was more prominent than in absence of NaCl for COD removal in organic industrial wastewater. The COD removal rate increased with increasing temperature over 40℃. The value for activation energy was determined at 4.3 kJ/mol. In the continuous reactor set-up examined, the bipolar electrode was more efficient for COD removal than multi-monopolar electrode. |
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| Key Words |
| BPER, Current density, Electrochemical anodic oxidation, Optimization, Organic industrial wastewater, 복극충전입자 전극반응기, 전류밀도, 양극산화, 적정운전조건, 유기성 산업폐수 |
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