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http://dx.doi.org/10.5322/JES.2007.16.6.699

Study on the Treatment of Contaminated Lake Water Using Micro Air Bubbles  

Kim, Jun-Young (Department of Environmental Engineering, Hoseo University)
Park, Chang-Won (Korea Clean Lake Engineering Cooperation)
Lee, Jong-Kyung (Korea Clean Lake Engineering Cooperation)
Chang, In-Soung (Department of Environmental Engineering, Hoseo University)
Publication Information
Journal of Environmental Science International / v.16, no.6, 2007 , pp. 699-706 More about this Journal
Abstract
Many lakes or irrigative reservoirs in Korea are rapidly contaminated due to the ever increasing pollutants. Although lots of treatment processes have been recommended and practiced, economical and technical improvement is currently needed. In this study, contaminated irrigation reservoir was treated using the proposed process which is consisted of fine air bubbles, coagulation and flotation. Fine bubbles, approximate diameter of 3 to $10{\mu}m$, were generated using cavitation in the pressurized tank and polyaluminum chloride was used as coagulants. This fine bubbles, coagulation and flotation effectively controlled the low density algae, for example, Chlorophyll-a was removed more than 97 %. Removal efficiency of COD, SS, T-N and T-P were 80.7%, 94.3%, 64.1 % and 92.4%, respectively. Pollutants released from the sediments was removed more than 80% of organics and 60-70 % of nutrients. Consequently, fine bubbles coagulation and flotation process could be effectively used as an alternative treatment method for the purpose of control of lake water quality.
Keywords
Eutrophication; Flotation; Float; Fine bubbles; Lake water; Reservoir;
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