Efficient management of drinking water distribution systems through the application of water quality modelling

Jegatheesan, V., Shu, L., Streeter, M., and Fracchia, H. (2003) Efficient management of drinking water distribution systems through the application of water quality modelling. In: Proceedings of Asian Waterqual 2003 IWA-Asia Pacific Regional Conference. - . From: Asian Waterqual 2003 IWA-Asia Pacific Regional Conference, 19-23 October 23, Bangkok, Thailand.

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The quality of drinking water generally degrades when it is delivered through a distribution system due to the decay of disinfectant, which subsequently allows the re-growth of microorganisms in the distribution system. A model that describes the changes that occur in the water quality in distribution system is needed to determine whether to enhance the treatment processes or to improve the distribution system so that microbiological criteria are met. This paper describes how chlorine decay kinetics are modeled and the model output is used in finding the elements that are contributing to the consumption of chlorine at the treatment plant other than the water itself; this allows better control of chlorine dosing at the treatment plant, which in tum will reduce the formation of disinfectant by-products. In addition, the model will accurately predict the decay due to the organic/inorganic and nitrogenous compounds that are remaining in the water at any point in the distribution system, which will indicate the status of the distribution system with respect to its chlorine consumption. Further, if re-chlorination is introduced in the distribution system downstream of the treatment plant, the model will predict the chlorine decay due to the slow reacting organic and nitrogenous compounds accurately.

Item ID: 7580
Item Type: Conference Item (Research - E1)
Keywords: biofilm; disinfectant decay; disinfection by-products; nitrogenous compounds; organic/inorganic compounds; water quality modelling
Date Deposited: 16 May 2010 22:53
FoR Codes: 09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 100%
SEO Codes: 96 ENVIRONMENT > 9699 Other Environment > 969999 Environment not elsewhere classified @ 100%
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