scholarly journals Modeling of the Chlorine Content Degradation in a Network of Drinking Water

2016 ◽  
Vol 10 (2) ◽  
pp. 56
Author(s):  
Ammadi Abdelaziz ◽  
Elbelkacimi Mourad
Keyword(s):  
Water Supply ◽  
Hierarchical Classification ◽  
Flow Speed ◽  
Chlorine Content ◽  
World Health ◽  
Residual Chlorine ◽  
Physical Factors ◽  
Supply Network ◽  
Time Data ◽  
Water Supply Network

<span lang="EN-US">In an urban water supply network, the chlorine is used as a disinfectant. Its absence involves the risk of microbial contamination which can degrade the quality of water. According to the standards of World Health Organization, the residual chlorine content in water shouldn’t be lower than 0.25 mg/l. Chlorine reacts with many compounds and thus undergoes degradation throughout its transit in the conduct of the network. This degradation is the result of several physical factors (age of conduct, matter, flow, speed…) and bacteriological (germs, coliform, biofilm…). In this paper, we use a mathematical model for mapping the degradation of the Chlorine along the water supply network. The concentration of chlorine in each control is also performed. We used an algorithm of Hierarchical Classification taking into account some characteristics (nature of conduct, speed, flow). Results shows that degradation of Chlorine calculated matched well with the measured one. This model allowed us to have a real-time data about the Chlorine content and thus to overcome the problem of the measure of the chlorine due to the non accessibility of the conducts.</span>

scholarly journals A Comparative Study on a Hydraulic and Water-Quality Analysis Method for Determining Rechlorination Injection Points for a Water-Supply Network

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 697 ◽  
Author(s):  
Sang Myoung Lee ◽  
Ho Min Lee ◽  
Do Guen Yoo ◽  
Joong Hoon Kim
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Water Pressure ◽  
Pressure Head ◽  
Quality Analysis ◽  
Residual Chlorine ◽  
Supply Network ◽  
Water Quality Analysis ◽  
Water Supply Network ◽  
Proposed Model

Water supply facilities are vulnerable to extreme weather events, such as droughts and floods. To establish a sustainable solution that resists accidents and disasters, a distributed system is required. To supply high-quality tap water using the existing water-supply network, rechlorination facilities must be installed to secure residual chlorine at the pipe end. In this study, a process is developed to determine the injection points and dosages of rechlorination using the latest pressure-driven analysis. The method was compared to the results of demand driven analysis methods. The proposed model was applied to P City in Korea to draw results. A detailed evaluation was performed to study how water pressure head and demand-based hydraulic and water quality analysis results impact the injection points and dosages of rechlorination. Thus, the existing demand-based model shows significant spatial deviations in the pressure head in the presence of water pressure drops, which subsequently lead to over-estimation of chlorine injection dosages for maintaining the concentration of residual chlorine. However, the proposed model involves a numerically validated theory and draws more reasonable results for hydraulic, water quality, and rechlorination dosages. The proposed model can be used as a decision-making tool based on hydraulic analysis for the supply of water of a stable quality.

Organics and its Control in Reclaimed Water

2014 ◽  
Vol 507 ◽  
pp. 752-756
Author(s):  
Chao Xiang ◽  
Ping Xu ◽  
Jing Wang ◽  
Tao Wang ◽  
Ya Jun Zhang
Keyword(s):  
Water Supply ◽  
Indirect Effects ◽  
Microbial Growth ◽  
Treatment Process ◽  
Reclaimed Water ◽  
Limiting Factors ◽  
Supply Network ◽  
Water Supply Network ◽  
Factors Affecting ◽  
Comprehensive Study

Some forms of organic matter existing in the water have direct or indirect effects on microbial growth. By the investigation data over drinking water and reclaimed water, we summarized organic limiting factors that may affect the growth of microorganisms and factors affecting these water qualities in the reclaimed water supply network, such as a variety of treatment process and the residual disinfectants. Through its comprehensive study, we want to make a contribution of opinion to control the growth of microorganisms in reclaimed water supply network.

Microplastics throughout a tap water supply network

2021 ◽  
Author(s):  
Joan Dalmau‐Soler ◽  
Rubèn Ballesteros‐Cano ◽  
Núria Ferrer ◽  
M. Rosa Boleda ◽  
Sílvia Lacorte
Keyword(s):  
Water Supply ◽  
Tap Water ◽  
Supply Network ◽  
Water Supply Network

scholarly journals The simple calibration procedure on the example of small town water supply system

2018 ◽  
Vol 44 ◽  
pp. 00167
Author(s):  
Jarosław Sowiński ◽  
Adam Hofman ◽  
Marek Dziubiński
Keyword(s):  
Water Supply ◽  
Aging Process ◽  
Calibration Procedure ◽  
Resistance Coefficient ◽  
Supply System ◽  
Supply Network ◽  
Practical Application ◽  
Urban Network ◽  
Water Supply Network ◽  
Material Calibration

The practical application of the model of water supply network realized in the program Epanet 2 requires the calibration of the model. The proposed simple calibration procedure, allows for taking into account the changes in resistance caused by the aging process, to be substituted by resistance coefficient K. In order to determine the substitute resistance coefficient K, the fire hydrant flow tests could be used, which allows to determine the aging for a given material. Calibration of the water supply network model is shown on the example of a small urban network in central Poland..

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