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Abstract
The occurrence of algal and Taste and odor compounds was investigated in Han River, Korea. Large numbers of algae flourish in a water body. The geosmin concentration increases to levels of 378 ng L−1. It was very difficult to control the geosmin through powdered activated carbon (PAC) treatment only. In this study, to remove the high concentration of geosmin, inter-chlorination treatment was applied between sedimentation basin and filtration. The removal efficiency of geosmin was evaluated through combined treatment by PAC and chlorination. The exclusive inter-chlorination treatment was more effective than combined treatment by pre-chlorination and inter-chlorination. It was proved to be removed above two times at low geosmin levels and 1.2 times at medium geosmin levels. Particularly, in the season of cyanobacterial blooms, the removal efficiency of geosmin was increased to 94%. Thus, the combined treatment by PAC and exclusive inter-chlorination has a synergy effect to remove geosmin.
Notes
Presented at 2013 International Environmental Engineering Conference and Annual Meeting of the Korean Society of Environmental Engineers (IEEC 2013) Seoul, Korea, June 11–13, 2013