water disinfection chlorine Articles
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Sorbents with biocidal properties for disinfection of water for various purposes
Conventional methods for water disinfection, especially chlorination, have a lot of disadvantages and should be perfected or substituted with safer and more efficient methods. One of the possible solutions to this problem is the application of sorbents with high disinfection efficacy. In this study, the opportunity of producing sorbents with biocidal properties based on non-oxidizing biocides ...
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Chlorine Theory & Measurement
Chlorine, dissolved in liquid is one of the most effective and economical semi-killers for the treatment of water to make it potable or safe to drink. Chlorine's powerful disinfectant qualities come from its ability to bond with and destroy the outer surfaces of bacteria and viruses. Drinking water chlorination is one of the most widely used methods to safeguard chinking water supplies. In ...
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Removing 2,4-dichlorophenol from aqueous environments by heterogeneous catalytic ozonation using synthesized MgO nanoparticles
2,4-Dichlorophenol (2,4-DCP) is one of the seriously toxic chlorophenol compounds found in agricultural environments, in water disinfected by chlorine, and in outgoing effluents from the pulp and paper industries and paper manufacturing factories. This research studied the feasibility of using MgO nanoparticles (MgO-NPs) as a catalyst in the ozonation process for removing 2,4-DCP from aqueous ...
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United States EPA Method 415.3
Abstract In order to ensure drinking water is safe for human consumption, water treatment plants often add disinfectants to drinking water. The disinfectants, such as chlorine, protect drinking water from pathogens, disease causing organisms, but can react with naturally occurring materials in the water to form byproducts that may be harmful for consumption. The United States Environmental ...
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Purpose: To determine the ability of the Hanovia UVP 61 water disinfection system to
Disinfection of public swimming pools and water amenities is essential to maintain safe and attractive bathing conditions. The challenge today is to provide water conditions free of irritants and after effects and smell. Customers expect clear, odour free, high quality water. Chlorine disinfection is the most common means of providing such protection. However, chlorine chemistry is complex and ...
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Effect of blending ratio on the formation of bromoform and bromate in blended water samples disinfected with chlorine or ozone
This study was carried out to assess the potential formation of bromoform and bromate in drinking water samples prepared by blending desalinated and brackish ground water when disinfected by chlorination or ozonation methods. The levels of bromoform and bromate were determined under various treatment conditions including blending ratios, disinfectant dosage, temperature, and reaction time. ...
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Effect of bacterial growth stage on resistance to chlorine disinfection
The mechanisms and factors that affect microbial resistance to chlorine disinfection have not been fully elucidated. In this study, we investigated the impact of the cell growth stage on chlorine disinfection efficiency. Specifically, we evaluated the impact of the growth stage on chlorination resistance by comparing the inactivation efficiencies of two indicator bacterial strains (Escherichia ...
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New Treatment Technology Targets TOC/DOC Removal at Florida Utility
Turn on any tap in Palm Springs, FL, and you will get crystal clear water. It has no odor, no metallic taste and compares favorably with most bottled waters. The residents are, quite naturally, very happy with it. Getting clean, refreshing water in Palm Springs was not an easy task. The ground water supply in South Florida typically contains large amounts of total organic carbon (TOC) in the ...
By Ixom
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Evaluating a composite cartridge for small system drinking water treatment
A pilot-scale evaluation was conducted at the U.S Environmental Protection Agency (EPA) Test & Evaluation (T&E) Facility in Cincinnati, Ohio, on a multi-layer, cartridge-based system that combines physical filtration with carbon adsorption and ultraviolet (UV) light disinfection to serve as a home-base water treatment security device against accidental or intentional contaminant events. The ...
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Biological wastewater treatment Dalian, China
To manage the demands set for the plant, a biological treatment with fixed bed was chosen. The water first undergoes pre-treatment by screening and grit/grease removal. Primary sedimentation is done in 4 tanks with lamellar sedimentation. The first step in the biological treatment consists of BOD, COD and SS removal in 12 Biofor filters. In these filters round expanded clay aggregates, ...
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Evaluation of pot-chlorination of wells during a cholera outbreak, Bissau, Guinea-Bissau, 2008
We evaluated the ability of UNICEF-designed pot-chlorinators to achieve recommended free residual chlorine (FRC) levels in well water in Bissau, Guinea-Bissau, during a cholera outbreak. Thirty wells were randomly selected from six neighbourhoods. Pot-chlorinators – perforated plastic bottles filled with gravel, sand and calcium hypochlorite granules – were placed in each well. FRC was measured ...
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Your Tap Water is More Toxic than you Think
At a Glance A new study proves that while adding chlorine to water has kept water clearer of diseases such as cholera and typhoid fever, it can leave behind toxic byproducts. These byproducts may have the potential to harm an individual’s long term health. At this point we don't even know all the byproducts left in the water from the current treatment methods. Your tap water might ...
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atg UV stand the test of time - Case Study
Client: Ainslie Park Leisure Centre Location: Edinburgh, Scottland Description: Swimming Pool Disinfection atg UV Technology, market leaders in the design and manufacture of Ultraviolet technology systems prides itself on its level of workmanship and quality. Five years ago atg UV Technology, replaced the existing ozone system at Ainslie Park Leisure Centre in Edinburgh with an atg UV ...
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Ainslie Park Leisure Centre - Case Study
The atg UV system treats 380 cubic metres an hour and in addition to disinfecting the pool-water, has the added benefit of reducing organics and combined chlorine levels, vastly improving the pool environment. Edinburgh, Scotland 5 years on: atg UV systems stand the test of time Ainslie Park Leisure Centre atg UV Technology, market leaders in the design and manufacture of ...
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TTHM Reduction Downstream of a 1MG GST
In-tank spray aeration systems can solve TTHM problems down the line. Topics: 1MG Tank, TTHM Removal, SN Series System Overview: 90% of water in this system comes from a third-party water treatment plant and is pumped 8 miles to the H-36 Ground Storage Tank. From here the water is distributed to the western pressure zone where all Stage 2 DBPR THM sample sites are located. The system density is ...
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Quality and disinfection trials of consumption water in storage reservoirs for rural area in the Marrakech region (Assif El Mal)
Traditional reservoirs for water storage are important systems of water supply in rural areas of Morocco. These reservoirs are fed by rainwater and/or directly from rivers through open channels; the stored water is used without any treatment as drinking water by the surrounding population. The present study aimed to assess the physicochemical and bacteriological quality of stored water and the ...
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How to Properly Maintain the High-Pressure Pump on Your Watermaker
If you work on or maintain a boat, offshore rig, or offshore oil or gas production platform, you know that one of your most important consumables is fresh, potable water. The saltwater with which you’re surrounded is filled with not only salt but also refuse, seaweed, silt, and other contaminants that can make it unsafe for regular use. Through the process of reverse osmosis, you can take ...
By H2O Inc.
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Characterising Swimming Pool Contaminants via Dissolved Species Analysis
Swimming pool contamination refers to several products that can cause health problems if not prevented and maintained correctly. Using specific chemicals and cleaning methods will ensure pool water is disinfected. However, chemicals used in the wrong dosage or mixed with other compounds can have severe consequences for swimmers and pool owners. Regular maintenance, testing, and identifying ...
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Active Mixing in a 19MG & 27MG Storage Basin - Case Study
Topics: potable water storage tanks, stratification/water age, short-circuiting, chlorine, treatment savings, economic System Overview: This is one of 40+ underground potable water storage reservoirs in this system. Disinfectant Type: Chlorine Reservoir Build Information: This reservoir consists of two basins. North Basin Volume (gallons): 27MG Reservoir Height (feet): 26 South Basin Volume ...
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Free and residual chlorine according to DIN EN ISO 7393-1
Metrohm is pleased to present an Application Bulletin describing the determination of free and total chlorine by iodometric titration. To disinfect water for human consumption, chlorine is added to the water in some countries. Because chlorine is highly toxic, organism like bacteria are killed and the onset of waterborne diseases like cholera is prevented. But chlorine is not only toxic to ...
By Metrohm AG
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