The optimal composition of the filter-media for coping with daily flow-rate fluctuation

No-Suk Park; Seong-Su Kim; Dong-Hark Park; Sangyoung Park; Seung-Il Choi

Korean Journal of Chemical Engineering, Vol.27, No.5, 1492-1496, September, 2010

DOI10.1007/s11814-010-0230-7 Export Citation

The optimal composition of the filter-media for coping with daily flow-rate fluctuation

No-Suk Park^†, Seong-Su Kim, Dong-Hark Park, Sangyoung Park, and Seung-Il Choi¹

Korea Institute of Water and Environment, Korea Water Resources Corporation, 462-1, Jeonmin-dong, Yuseong-gu, Daegeon 305-730, Korea
¹Department of Environmental Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea

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The fluctuation of inlet flow in a water treatment plant can change the filtration rate abruptly and ultimately reduce the filtration performance by leaking the detained particles in filter media. The surface wave, occurring in the intake well by the fluctuation of inlet flow, reaches the filtration process in a very short time (about 10 minutes), which makes it impossible to control the filtration rate stably. In this study the authors evaluated the effect of daily flow-rate fluctuation on the performance of sand filtration process, and the dual media composition was proposed to improve the filtration performance. Comparative column tests were carried out for the various dual media, such as sand and anthracite compositions. From the results of column tests, dual media with the composition of sand 45 cm and anthracite 30 cm is more effective than the single media with sand in filtration process. In addition, irrespective of dual media composition, the managing ability to cope with that fluctuation tends to be weak at the end of allowable filtration duration time.

Keywords:Filtration;Inlet Flow Fluctuation;Dual Media;Surface Wave

[References]

American Water Works Association, Water Quality and Treatment, 5th Ed., McGraw-Hill, New York (1999)
American Water Works Association, Water Treatment Plant Design, 3th Ed., McGraw-Hill, New York (1997)
Korea Water Resources Corporation, Establishment of methodology for optimal operation of filtration process, Korea Water Resources Corporation, Daejeon (2007)
Park NS, Lim SE, Kim SS, Hwang JS, Jung NC, Korean J. KSWW., 22, 79 (2008)
Cleasby JL, Sindt GL, Watson DA, Baumman ER, Design and operation guidelines for optimization of high-rate filtration process; Plant demonstration studies., AWWA Research Foundation Denver, Colorado (1992)

[1] American Water Works Association, Water Quality and Treatment, 5th Ed., McGraw-Hill, New York (1999)

[2] American Water Works Association, Water Treatment Plant Design, 3th Ed., McGraw-Hill, New York (1997)

[3] Korea Water Resources Corporation, Establishment of methodology for optimal operation of filtration process, Korea Water Resources Corporation, Daejeon (2007)

[4] Park NS, Lim SE, Kim SS, Hwang JS, Jung NC, Korean J. KSWW., 22, 79 (2008)

[5] Cleasby JL, Sindt GL, Watson DA, Baumman ER, Design and operation guidelines for optimization of high-rate filtration process; Plant demonstration studies., AWWA Research Foundation Denver, Colorado (1992)