Journal
WATER SCIENCE AND TECHNOLOGY
Volume 71, Issue 8, Pages 1196-1202Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2015.092
Keywords
electrocoagulation; emulsified oils; pulsed voltages; specific energy consumption
Funding
- TUBITAK [111Y233]
- Bulent Ecevit University [BAP: 2012-17-17-01]
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The effect of pulsed voltage application on energy consumption during electrocoagulation was investigated. Three voltage profiles having the same arithmetic average with respect to time were applied to the electrodes. The specific energy consumption for these profiles were evaluated and analyzed together with oil removal efficiencies. The effects of applied voltages, electrode materials, electrode configurations, and pH on oil removal efficiency were determined. Electrocoagulation experiments were performed by using synthetic and real wastewater samples. The pulsed voltages saved energy during the electrocoagulation process. In continuous operation, energy saving was as high as 48%. Aluminum electrodes used for the treatment of emulsified oils resulted in higher oil removal efficiencies in comparison with stainless steel and iron electrodes. When the electrodes gap was less than 1 cm, higher oil removal efficiencies were obtained. The highest oil removal efficiencies were 95% and 35% for the batch and continuous operating modes, respectively.
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