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A Study on the Ozoflotation Process for Drinking Water Treatment  

Kang, Tae Hee (Department of Environmental Engineering, Yonsei University)
Oh, Byung Soo (Department of Environmental Engineering, Yonsei University)
Lee, Hoon (International Institute for Water and Wastewater, Korea Water Resources Corporation)
Byun, Kyu Sik (International Institute for Water and Wastewater, Korea Water Resources Corporation)
Kwon, Soon Buhm (International Institute for Water and Wastewater, Korea Water Resources Corporation)
Sohn, Byeong Yong (Hoengseong Regional Office, Korea Water Resources Corporation)
Ahn, Hyo Won (International Institute for Water and Wastewater, Korea Water Resources Corporation)
Kang, Joon-Wun (Department of Environmental Engineering, Yonsei University)
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Abstract
Ozone, a powerful oxidant, is widely used to remove microorganisms, pesticides, taste and odor compounds effectively. Dissolved air flotation (OAF) has been known as an economical process for treating algae and low turbid water quality. An ozoflotation system, combining ozone and OAF processes, has a merit which can operate the ozonation and flotation process simultaneously in a single compartment. This study investigated the application of the ozoflotation process for advanced water treatment by carrying out the pilot-plant experiment. During the test, ozone microbubbles were generated through a OAF pump and many kinds of parameters were evaluated under several conditions, such as raw water flow rate and ozone dose. As a result of the test, the optimum operating conditions of ozoflotation were decided to be 1.2 mg/L ozone dose and about 34 minute Hydraulic retention time (HRT). Finally, it could be demonstrated that the ozoflotation system can effectively improve the drinking water quality.
Keywords
Ozone; Dissolved air flotation; Ozoflotation; Advanced water treatment; Dissolved air flotation (DAF) pump;
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