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Efficiency Evaluation of Different Processes in Drinking Water Treatment  

Kim, Hyung-Suk (Department of Civil and Environmental Engineering, University of Ulsan)
Lee, Byoung-Ho (Department of Civil and Environmental Engineering, University of Ulsan)
Publication Information
Journal of Korean Society of Water and Wastewater / v.25, no.4, 2011 , pp. 597-604 More about this Journal
Abstract
This study was performed to compare finished water quality among three different processes. A detailed assessment of performance was carried out during the five months of operation. Finished water quality was evaluated on the basis of parameters such as Dissolved organic carbon (DOC), $UV_{254}$ absorbance, haloacetic acid formation potential (HAAFP), geosmin, 2-methylisoborneol (2-MIB), heterotrophic bacteria and total coliform bacteria. The treatment processes were Process 1 (coagulation-flocculation-sedimentation-sand filtration-ozone-GAC), Process 2 (coagulation-flocculation-sedimentation -microfiltration-ozone-GAC), and Process 3 (coagulation-flocculation-sedimentation- sand filtration-GAC), compared side by side in the pilot testing. Process 2 was found to have better removal efficiency of DOC, $UV_{254}$ absorbance, HAAFP and heterotrophic bacteria in comparison with process 1 and process 3 under identical conditions. Geosmin, 2-MIB and total coliform bacteria were not detected in finished water from each process.
Keywords
DOC sand filtration; GAC; microfiltration; ozone;
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