Results 161 to 170 of about 45,134 (180)

Chlorine decay studies in water supply system.

Journal of environmental science & engineering, 2011
Water supplied to the public through municipal water works should be qualitatively good and quantitatively sufficient. It is important that the potability of water is maintained at the consumer end. The presence of residual chlorine is invariably considered as an indicator of water quality.
G R, Munavalli, M A, Kulkarni
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Residual chlorine decay in a broad, shallow river

Water Research, 1993
Abstract Field investigations into the mixing and decay of discharge plumes containing total residual chlorine (TRC) concentrations of 2.0 mg/l were conducted in the North Saskatchewan River downstream from two water treatment plants in the City of Edmonton, Canada.
G.D. Milne, S.J. Stanley, D.W. Smith
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Realistic numerical simulation of chlorine decay in pipes

Water Research, 1998
The objective of the present study is to develop a numerical mass transport model that can simulate chlorine disappearance mechanisms under low flow conditions. The model accounts for axial convection and radial diffusion in a pipe under turbulent, transitional and laminar flow regimes and uses realistic velocity profiles.
Ger, AM, Ozdemir, OSMAN NURİ
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Modelling chlorine residual decay as influenced by temperature

Water and Environment Journal, 2015
AbstractTemperature is one of the most important factors affecting chlorine decay rates in drinking water systems. In this article, temperature effect on chlorine decay rates in raw and treated waters was studied. Results show that temperature affects differently the fast and slow decay phases, the latter being more sensitive to temperature variations,
Laura Monteiro, Rui M.C. Viegas, Dídia I.C. Covas, José Menaia   +3 more
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Modelling of chlorine decay in municipal water supplies

Water Research, 1999
Abstract This paper describes the effects which temperature and the initial chlorine concentration have on the chlorine decay in different water samples. It also reports the derivation of empirical formulae which describe these effects. The data show that chlorine decays more rapidly in fresh samples than in those which had been re-chlorinated with ...
Fang Hua, J.R West, R.A Barker, C.F Forster   +3 more
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Relationship of chlorine decay and THMs formation to NOM size

Journal of Hazardous Materials, 2003
Because of increasing concern about balancing health risks for pathogen control and disinfection by-product (DBP) formation in water supplies, utilities are forced to closely examine and optimize their disinfection practices. A better understanding of the relationship between the molecular weights of the natural organic matter (NOM), chlorine decay ...
Dianchen, Gang, Thomas E, Clevenger, Shankha K, Banerji   +2 more
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A new approximate solution for chlorine concentration decay in pipes

Water Research, 2008
Biswas et al. (1993. A model for chlorine concentration decay in pipes. Water Res. 27(12), 1715-1724) presented an analytical solution of a two-dimensional (2-D) steady-state chlorine transport equation in a pipe under the turbulent condition and employed fractional error function and regression technique to develop an approximate solution.
Hund-Der, Yeh, Shi-Bin, Wen, Ya-Chi, Chang, Chung-Sying, Lu   +3 more
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Synergistic ferrate(VI) and chlorine for reclaimed water disinfection: Microbial control and chlorine decay mitigation

Science of The Total Environment
Chlorination is the most widely used disinfection technology due to its simplicity and continuous disinfection ability. However, the drawbacks of disinfection by-products and chlorine-resistant bacteria have gained increasing attention. Nowadays, ferrate (Fe(VI)) is a multifunctional and environmentally friendly agent which has great potential in ...
Yu, Mao, Zhuo, Chen, Song, Xue, Yun, Lu, Ke-Fan, Cao, Yin-Hu, Wu, Hong-Ying, Hu   +6 more
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Comment on “A Variable Rate Coefficient Chlorine Decay Model”

Environmental Science & Technology, 2009
We commend Jonkergouw et al. (1) for adopting the goal of developing a chlorine decay model that is practical for “...day-to-day water distribution network modelling purposes and chlorine dosing optimisation studies” in the sense that the model coefficients are independent of loading conditions (initial and rechlorination doses).
Fisher, I., Kastl, G., Sathasivan, Arumugam, Jegatheesan, V.   +3 more
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Impact of Booster Chlorination on Chlorine Decay and THM Production: A Simulated Analysis

2005
Chlorine is commonly used in drinking water treatment as both a primary disinfectant and as a secondary disinfectant to carry a residual in the distribution system. The continuing formation of disinfection by-products (DBFs), including trihalomethanes (THMs), due to reactions between residual chlorine and natural organic matter (NOM) has led utilities ...
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