Results 261 to 270 of about 796,408 (333)
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Journal AWWA, 1997
Models of chlorine kinetics in distribution systems characterize chlorine decay as a combination of first‐order decay in the bulk liquid and first‐order or zero‐order decay reactions at the pipe wall.Proper understanding, characterization, and prediction of water quality behavior in drinking water distribution systems are critical to ensure meeting ...
John J. Vasconcelos +4 more
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Models of chlorine kinetics in distribution systems characterize chlorine decay as a combination of first‐order decay in the bulk liquid and first‐order or zero‐order decay reactions at the pipe wall.Proper understanding, characterization, and prediction of water quality behavior in drinking water distribution systems are critical to ensure meeting ...
John J. Vasconcelos +4 more
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A Variable Rate Coefficient Chlorine Decay Model
Environmental Science & Technology, 2008Chlorine is the most widely used water disinfectant in the world. As a result, optimal chlorine usage is essential for both human and environmental health. Chlorine decay models can be used to predict residual concentrations in water distribution networks and optimize chlorine dosing. However, the coefficients of current chlorine decay models are often
Jonkergouw, PM +5 more
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Chlorine Decay Models and Influencing Factors
Applied Mechanics and Materials, 2014Microorganism control has a great significance for the safety of drinking water and reclaimed water. Disinfectants and its dosing quantity are particularly important. Several common chlorine disinfectants decay models were analyzed firstly in the paper.
Bo Liu +4 more
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Chlorine Decay in Auckland's Distribution System
WRPMD'99, 1999The first step in finding a cure for water quality deterioration in water distribution systems is to study how water quality varies within the distribution system and the causes and effects of this variation. This paper discusses a pilot study aimed at assessing the propagation and concentration of chlorine in a water distribution network and ...
Bassam Halabi +2 more
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Simulation of Chlorine Decay in Drinking-Water Distribution Systems
Journal of Environmental Engineering, 2002This work presents a model that evaluates the decay of the chlorine concentration in drinking water distribution networks. The model may use either Lagrangian based time driven or event driven methods depending on the hydraulic characteristic of the pipes. The decay of the chlorine within a pipe is evaluated by using a single equation that incorporates
Ucak, A, ÖZDEMİR, OSMAN NURİ
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MODELLING CHLORINE DECAY IN DRINKING WATER MAINS
Environmental Engineering and Management Journal, 2008Drinking water treatment plays an important role in maintaining public health. Chlorine is the most often disinfectant used for microbiological protection of water. Required residual chlorine concentration must be in treated water when it leaves treatment plant, to comply with the regulations. The chlorine residual must be 0.5 mg/L at the entrance into
Diana Robescu +2 more
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Chlorine Decay KINETICS of a Reservoir Water
Journal AWWA, 2001Massachusetts Water Resources Authority started adding sodium hypochlorite to its raw water (Wachusett Reservoir) in September 1997 to achieve compliance with the requirements of the Surface Water Treatment Rule for unfiltered surface water supplies, mainly the 3‐log C × T (concentration times time) value for Giardia inactivation.
Windsor Sung +3 more
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Factors which control bulk chlorine decay rates
Water Research, 2000Abstract Several computer programs for modelling water distribution networks have been developed which incorporate a facility for modelling chlorine decay. Problems have been experienced with the calibration and durability of these models due to both temporal and spatial variability in the decay constants.
James C. Powell +4 more
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Environmental Science and Technology
Far UV light (UV222) is a promising alternative to traditional 254 nm UV light (UV254) in water treatment, raising great interest in UV222-based advanced oxidation processes, particularly UV222/chlorine.
Kaiheng Guo +6 more
semanticscholar +1 more source
Far UV light (UV222) is a promising alternative to traditional 254 nm UV light (UV254) in water treatment, raising great interest in UV222-based advanced oxidation processes, particularly UV222/chlorine.
Kaiheng Guo +6 more
semanticscholar +1 more source
Modeling of Chlorine Disinfectant Decay in Seawater
Journal of the Korean Society of Water and Wastewater, 2016Disinfectant/oxidation process is a crucial process in water treatment for supplying safe drinking water. Chlorination is still widely used for water treatment area due to its effectiveness on microbial inactivation and economic feasibility. Recently, disinfection concern in marine environment is increasing, for example, movement of hazardous marine ...
Jihee Han, Jinsik Sohn
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