chloramination water Articles | Environmental XPRT

Cause of rapid monochloramine decay observed in treated water

Rapid monochloramine decay has been observed in the product water of three River Murray water treatment plants (WTPs). Previous investigations identified that rapid monochloramine decay was microbiological in nature and observed in samples taken after media filtration but was absent in filtered water samples from a fourth WTP of similar design. The filters at the WTP not exhibiting rapid ...

Oct. 14, 2016

By IWA Publishing

Residual Control Technology Saves Millions of Gallons of Water While Maintaining Consistent Chloramine Residual Levels Case Study

Loudoun water in Northern Virginia has a history of embracing change and seizing opportunities to create a more robust and sustainable water system. Situated in the fast-growing suburbs of Washington D.C., Loudoun Water provides chloraminated drinking water to over 65,000 households through a networkcomprisedof more than 1,200 miles of pipes and seven water storage tanks. A key element of Loudoun ...

Jul. 17, 2018

By Process Solutions, Inc. (PSI)

Fast Response, Early Boost: Eliminate Ammonia Oxidizing Bacteria

Potable water storage tanks in chloraminated systems endure water quality problems, particularly during warm weather. A simple approach can solve these problems, enhance a facility's mixing system, and save money. Historically, attempts to solve water quality problems in chloraminated systems that use water storage tanks have been minimally successful. Many storage tank facility managers have ...

Jun. 8, 2016

By Medora Corporation

Evaluation of approaches for consumers to eliminate chlorine off-flavors from drinking water at point-of-use

Chlorine off-flavors of tap water have caused dissatisfaction and distrust from some consumers, placing pressure on operators concerning water disinfection. Evaluating practical approaches for eliminating chlorinous off-flavors by consumers at point-of-use while avoiding production of toxic byproducts is a practical concern. Three recognized dechlorination methods: ultraviolet (UV) irradiation, ...

Feb. 4, 2015

By IWA Publishing

A kinetic study of nitrification inhibition in water distribution systems using low levels of chlorite

Water utilities use operational strategies such as increasing pH, chlorine-ammonia ratio, and/or chloramine residual, distribution main flushing, and periodic break-point chlorination to control nitrification of chloraminated water in distribution systems. Although these methods are proven to be useful in controlling nitrification, the results are utility dependent and sometimes not effective ...

Sep. 8, 2014

By IWA Publishing

Automated Residual Control Maintains Tank Chloramine Residual Levels and Eliminates Nitrite Issues in 3 Million Gallon Tank Case Study

Automated Residual Control Maintains Tank Chloramine Residual Levels and Eliminates Nitrite Issues in 3 Million GallonTankLoudoun Water in Northern Virginia has a history of embracing change and seizing opportunities to create a more robust and sustainable water system. Situated in the fast-growing suburbs of Washington DC, Loudoun Water provides chloraminated drinking water to over 65,000 ...

Feb. 15, 2017

By Process Solutions, Inc. (PSI)

Source of <italic>N</italic>-nitrosodimethylamine in river waters of the upper Tone River basin in Japan

Source of N-nitrosodimethylamine in river waters of the upper Tone River basin in Japan

The presence of N-nitrosodimethylamine (NDMA) in the Hirose River and its tributaries, located in the upper Tone River basin, in the Kanto region of Japan, was investigated. NDMA was detected at high levels in the Arato River, one of the tributaries of the Hirose River, at high concentrations (up to 2,100 ng/L). Due to the confluence of the Arato River, NDMA concentration in the Hirose River ...

Dec. 1, 2010

By IWA Publishing

East Bay Municipal Utility District Successfully Manages Chloramine Residual in Ten Million Gallon Reservoir with the Process Solutions, Inc. Monoclor Chloramine Management System

Located on the eastern side of the San Francisco Bay, the East Bay Municipal Utility District (EBMUD) treats and distributes water to over 1.3 million customers in Alameda and Contra Costa counties. As one of the largest utility districts in California, EBMUD is a leader in the water industry’s water quality, conservation and sustainability efforts. EBMUD chloraminates water prior to ...

Oct. 7, 2015

By Process Solutions, Inc. (PSI)

Chloraminated potable water tank - Case study

Topics: Potable, stratification, nitrification, breakpoint chlorinationi chloramine Overview: This reservoir is an enclosed water storage facility for potable chloraminated water, and is the largest reservoir in their system. Surface area is 11.0 surface acres and maximum depth is 30 feet when full; operating volume is 90 million gallons. There are 1000 roof support columns in the reservoir. ...

Oct. 3, 2016

By Medora Corporation

Determining the fate of Microcystis aeruginosa cells and microcystin toxins following chloramination

The cyanobacterium Microcystis aeruginosa can produce potent toxins known as microcystins. While many studies have focussed on the chlorination of microcystin toxins, little work has been conducted with respect to the chloramination of the microcystins. In addition, no studies have been reported on the effect of chloramination on intact Microcystis cells. This study was conducted to determine the ...

Jul. 1, 2010

By IWA Publishing

West Columbia, SC, municipal drinking water

The Lake Murray Water Treatment Plant (LMWTP) in West Columbia, S.C., was dedicated in 1991 with a capacity of 6 million gal per day (mgd). With upgrades completed in 2007, the plant has a current capacity of 22.5 mgd. Most of the water from LMWTP is sold; 19% of the water is distributed to the system for which the LMWTP management and staff is responsible. 0In the early 1990s, the water ...

Jan. 30, 2012

By MIOX Corporation - Johnson Matthey`s Water Technologies

Fluorescence characteristics of natural organic matter in water under sequential exposure to UV irradiation/chlor(am)ination

The organic matter in International Humic Substances Society Natural Organic Matter (IHSS NOM) water exposed to ultraviolet (UV) irradiation and chlor(am)ine sequentially under practically relevant conditions was characterized based on fluorescence spectra. IHSS NOM water exposed to UV irradiation or chlor(am)ine alone was also evaluated. Both chlor(am)ine alone and UV/chlor(am)ine exposure ...

Feb. 18, 2014

By IWA Publishing

Removing Chloramines from Drinking Water Supplies

Historically, most public water supplies have been treated with chlorine to satisfy the standards set by the Safe Drinking Water Act of 1974. Since being established, there is reason to believe that the standards may be too lenient on the allowable contaminant levels in our drinking water. For instance, chlorine and other disinfectants react with organic matter creating carcinogenic by-products1. ...

Dec. 1, 2013

By General Carbon Corporation

Performance Comparison of RO and NF Systems

The nanofiltration train (NF-A) and reverse osmosis train (RO-A) at Port Hueneme Brackish Reclamation Demonstration Facility in Southern California have both suffered from biofouling since startup in November 1998 until the plant implemented a raw water chloramination scheme in June 2000 (around 13,500 hours of operation). Moreover, the nanofiltration membrane elements also suffered from a ...

Jun. 17, 2015

By MASAR Technologies, Inc.

Fundamentals of Catalytic Activated Carbons

Untitled Document Summary: Catalysts in water treatment speed chemical reactions so equipment can be scaled down or contact times shortened. Because the speed of a reaction can affect equipment price or useful life, it could mean the difference between a sale and a "no, thanks." Thus, recently developed catalytic activated carbons may enable water treatment ...

Jan. 1, 1994

By Calgon Carbon Corporation UV Technologies Division

Factors affecting formation of haloacetonitriles and haloketones during chlorination/monochloramination of Jinlan Reservoir water

Formations of haloacetonitriles (HANs) and haloketones (HKs) from chlorination and chloramination from Jinlan Reservoir water under different treatment conditions were investigated in this study. Results showed that monochloramine rather than chlorine produced significant lower concentrations of HANs and HKs. In chlorination, the formation of HANs and HKs increased with the reaction time and ...

Aug. 6, 2013

By IWA Publishing

N-nitrosamine formation during chlorination/chloramination of bromide-containing water

This study investigated the impact of bromide on the formation of N-nitrosamines during chlorination and chloramination, and tried to identify the reactive intermediates responsible for variations in the yield of N-nitrosamines. As an intermediate of the reaction between bromide and HOCl, bromine chloride (BrCl) may improve the yield of N-nitrosodimethylamine (NDMA) formation. But increasing the ...

Jul. 1, 2010

By IWA Publishing

Moving away from chloramines while maintaining water quality

The Lake Murray Water Treatment Plant (LMWTP) in West Columbia, S.C., was dedicated in 1991 with a capacity of 6 million gal per day (mgd). With upgrades completed in 2007, the plant has a current capacity of 22.5 mgd. Most of the water from LMWTP is sold; 19% of the water is distributed to the system for which the LMWTP management and staff is responsible. In the early 1990s, the water ...

Jan. 20, 2009

By MIOX Corporation - Johnson Matthey`s Water Technologies

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 ...

Apr. 1, 2011

By atg UV Technology

Alternative Disinfectants and N-Nitrosamines in Drinking Water: are we really Managing Human Health Risks?

ABSTRACT North American drinking water utilities are increasingly incorporating alternative disinfectants, such as chloramines, in order to comply with disinfection by-product (DBP) regulations. NNitrosodimethylamine (NDMA) is an unregulated, non-halogenated DBP associated with chloramination, having a drinking water carcinogenic unit risk two to four orders of magnitude greater than currently ...

Oct. 13, 2007

By Water Environment Federation (WEF)

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