Evaluating the effects of granular and membrane filtrations on chlorine demand in drinking water

Jegatheesan, Jega, Kim, Seung-Hyun, Joo, C. K., and Gao, Baoyu (2009) Evaluating the effects of granular and membrane filtrations on chlorine demand in drinking water. Journal of Environmental Sciences, 21 (1). pp. 23-29.

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In this study, chlorine decay experiments were conducted for the raw water from Nakdong River that is treated by Chilseo Water Treatment Plant (CWTP) situated in Haman, Korea as well as the effluents from sand and granular activated carbon (GAC) filters of CWTP and fitted using a chlorine decay model. The model estimated the fast and slow reacting nitrogenous as well as organic/inorganic compounds that were present in the water. It was found that the chlorine demand due to fast and slow reacting (FRA and SRA) organic/inorganic substances was not reduced significantly by sand as well as GAC filters. However, the treated effluents from those filters contained FRA and SRA that are less reactive and had small reaction rate constants. For the effluents from microfiltration, ultrafiltration, and nanofiltration the chlorine demand because FRA and SRA were further reduced but the reaction rate constants were larger compared to those of sand and GAC filter effluents. This has implications in the formation of disinfection by products (DBPs). If DBPs are assumed to form due to the interactions between chlorine and SRA, then it is possible that the DBP formation potential in the effluents from membrane filtrations could be higher than that in the effluents from granular media filters.

Item ID: 11206
Item Type: Article (Research - C1)
ISSN: 1001-0742
Keywords: chlorine decay model; initial concentration; nitrogenous compounds; organic and inorganic compounds; reaction rate constants
Date Deposited: 28 May 2010 01:20
FoR Codes: 09 ENGINEERING > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies @ 30%
09 ENGINEERING > 0904 Chemical Engineering > 090410 Water Treatment Processes @ 30%
09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 40%
SEO Codes: 96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961101 Physical and Chemical Conditions of Water for Urban and Industrial Use @ 100%
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