residual chlorine Articles
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Hollywood Casino Columbus, Ohio, U.S.A - Case Study
A $400 million redevelopment project that will be the site for a new gaming casino was formerly an automotive factory. The primary contaminants of concern on this 123 acre brownfield site Primary concern were residual chlorinated compounds from former cleaning and manufacturing ...
By CETCO
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Spatial diversity of chlorine residual in a drinking water distribution system: application of an integrated fuzzy logic technique
A reduction in the concentration of chlorine, which is used as a chemical disinfectant for water in drinking water distribution systems, can be considered to be an index of the progressive deterioration of water quality. In this work, attention is given to the spatial distribution of the residual chlorine in drinking water distribution systems. The criterion for grouping the water-quality ...
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Oxidative decomposition properties of cationic exchange resins producing SO42− in power plants
The sulphate content of a system increases when strong-acid cationic exchange resins leak into a system or when sulphonic acid groups on the resin organic chain detach. To solve this problem, a dynamic cycle method was used in dissolution experiments of several resins under H2O2 or residual chlorine conditions. Results show that after performing dynamic cycle experiments for 120 hours under ...
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Effect of advanced water treatment on behaviour of residual chlorine and development of chlorine control method in distribution systems
The behaviour of residual chlorine concentration in drinking water treated by the mid-chlorination or the advanced water treatment (AWT) was investigated. The AWT removes dissolved organic matter more than the mid-chlorination, thus the rate of residual chlorine reduction is decreased. The analysis of chlorine concentration data measured by automated continuous monitoring devices revealed that ...
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Elution of bisphenol A and its chlorination by-products from lined pipes in water supply process
Elution of bisphenol A (BPA), chlorinated BPAs (i.e., 3-chlorobisphenol A, sum of 3,5-dichlorobisphenol A and 3,3′-dichlorobisphenol A, 3,3′,5-trichlorobisphenol A, and 3,3′,5,5′-tetrachlorobisphenol A) and 2,4,6-trichlorophenol (TCP) from lined pipes coated with two epoxy resins were investigated in a 24-month continuous test passing tap water. BPA, chlorinated ...
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Water residence time in a distribution system and its impact on disinfectant residuals and trihalomethanes
The most critical water quality conditions are generally found at a water distribution network's extremities, given their high residence times. As chlorine injected at the water treatment plant (WTP) or at rechlorination sites has more time to react, residual chlorine concentrations at the extremities may not be enough to prevent microbial regrowth. This study focuses on the relationships between ...
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Types and applications of residual chlorine sensors for water quality
Background:Residual chlorine sensor is an essential tool in water treatment. They are used to measure the concentration of free chlorine that remains in water after being treated with chlorine. Residual chlorine level is an important parameter to determine the effect of water treatment and ensure the safety of drinking water supply.Chlorine is added to water as a disinfectant to kill harmful ...
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Online Process Analyzer Installed at F.J. Horgan WTP to Monitor Chloramination
Construction was completed on the City of Toronto's F.J. Hor-gan Water Treatment Plant in 1979, more than 60 years after chloramine had first been used to disinfect drinking water in an Ottawa plant. By then there was little debate about the benefits of chloramination and it was incorporated into the new plant's design as part of the disinfection process. Chloramine is more stable than free ...
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Removal of DOM and AOC in a full-scale advanced water treatment plant: effects of operational periods of BAC filters
Water utilities in Japan want to reduce residual chlorine levels so as to reduce disinfection byproducts and the chlorine smell, but bacterial regrowth is a concern. In advanced water treatment plants using ozonation and biological activated carbon (BAC), BAC plays the most important role in reducing assimilable organic carbon (AOC). Therefore, we analyzed the removal of dissolved organic ...
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Active mixing in Twin 270,000 gallon tanks - Case study
Temperature Stratification Eliminated - Consistent Chlorine Residuals Topics: potable tank mixing, stratification, chlorine residual Location & Contact Information: Further information may be available upon request. Please contact Medora Corporation by phone at 866-437-8076 or by e-mail, info@medoraco.com System Overview: Treated water is purchased from a third-party Water Authority and ...
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On the usage of artificial neural networks in chlorine control applications for water distribution networks with high quality water
Artificial neural network (ANN) methodology has found some recent applications as efficient control tools for satisfying free residual chlorine (FRC) levels at critical locations of water distribution systems. This particular research was started to critically investigate the potential and applicability of the ANN approach as a tool for controlling FRC levels for complex water distribution ...
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Influence factors of organic compounds leaching from PE pipes and the potential toxic effects on E. coli and rat C6 glioma cell
Water quality safety is always a hot topic. Recently there has been a great increase in the use of polyethylene (PE) pipes in drinking water distribution systems in China. Some organics can leach from PE pipes into drinking water, which is undoubtedly harmful for consumers. In this study, potential organics leaching from two Chinese brands of PE pipe were investigated in order to determine ...
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Chemscan mini analyzers monitor sulfite and chlorine levels - Case Study
Problem: The wastewater plants in Clarkson and Guelph, Ontario use chlorine for disinfection but have severe limits on the concentration of chlorine residual that can be discharged. The receiving stream has limited capacity and is populated by aquatic life sensitive to chlorine. The usual approach to this problem is to feed sulfite in sufficient concentration to de-chlorinate the effluent. ...
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DelAgua Case Study - Harikar NGO and CARE in Northern Iraq
Harikar NGO are working with CARE to provide water quality testing in camps for IDPs (Internationally Displaced People), in Northern Iraq. CARE have carried out a 2-day training course with Harikar field staff on the DelAgua Kit so they are able to carry out weekly bacteriological testing. Harikar have previously been carrying out Free Residual Chlorine testing inside the camps to check if it is ...
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Cleaning Reservoir Data to Understand Water Age
Cleaned historical reservoir data tells a story about water age, which impacts on water quality. Excessive water ageing is likely to lead to a reduction in residual chlorine concentration, and potentially poor disinfection for communities. Reservoirs can experience considerable differences in winter and summer water age especially where there is high summer tourism. Cleaning and organising ...
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Top 6 water quality sensors
What is a water quality sensor? Water quality sensors measure water parameters such as conductivity, dissolved oxygen, pH, COD, residual chlorine, turbidity and so on through a variety of methods such as chemical, physical and biological reactions of water, providing data support for researchers, observers and engineers. It is used in laboratory research, environmental management improvement, ...
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Water quality comprehensive evaluation method for large water distribution network based on clustering analysis
In order to evaluate water quality for a large water distribution network comprehensively, a two-stage classification method was used and the clustering methods, self-organizing map (SOM), K-means method and fuzzy c-mean (FCM), were represented. With these clustering methods, the pipes of a large real water distribution network were divided into some groups considering one or more water quality ...
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Impact of AOC and chlorine residual on regrowth of microbes in a model distribution system receiving UV-treated potable water
The microbial ecology of distribution systems is complex and is influenced by a number of factors. This study assessed whether or not during drinking water treatments it is important to add a chemical disinfectant after ultraviolet (UV) disinfection in order to control the regrowth of microbes in distribution systems. Results showed that low UV doses did not impact assimilable organic carbon ...
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Water Ion Sensor-Water Ion Monitoring
About- Water Ion Sensor Ion sensor is a sensor that uses ion selective electrode to convert the amount of ions felt into usable output signal. Ion sensor is a selective measurement of the concentration (activity) of specific ions in solution. It has been 20 years since its development and plays an extremely important role in all scientific fields. In recent years, due to the development of ...
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Chlorine Residuals In A Newly Mixed Potable Water Storage Tank
Active mixing is one of the best, most sure-fire methods to maintain water quality in your potable water storage tanks. The following are some key concepts to understand when it comes to newly introduced active mixing and the chlorine residual in your already-in-use tanks. The Unmixed Tank Condition Without an active mixer in the tank, water quality is dependent on incidental mixing caused by ...
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