NDMA Articles
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Effects of natural organic matter and nitrate on the behavior of nitrosodimethylamine during ultraviolet irradiation and chloramination
Nitrosodimethylamine (NDMA), a potent carcinogen, is found in natural and engineered water systems. Ultraviolet (UV) treatment is potentially a useful tool for controlling NDMA at water purification plants. However, a recent study has reported that UV/advanced oxidation process (AOP) treatment may provide a source of NDMA precursors. Therefore, we investigated the effect of UV treatment on the ...
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Occurrence of N-nitrosodimethylamine precursors in wastewater treatment plant effluent and their fate during ultrafiltration-reverse osmosis membrane treatment
The formation of N-nitrosodimethylamine (NDMA) is of major concern among wastewater recycling utilities practicing disinfection with chloramines. The NDMA formation potential (FP) test is a simple and straightforward method to evaluate NDMA precursor concentrations in waters. In this paper we show the NDMA FP results of a range of tertiary wastewater treatment plants that are also the source for ...
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Application of a Medium Pressure UV System for the Treatment of N-Nitrosodimethylamine (NDMA)
Untitled Document N-nitrosodimethylamine (NDMA) was first detected in 1990 as a problem pollutant in drinking water wells at levels as high as 3,000 ppt in Elmira, Ontario, Canada. The waste from a large chemical plant over many years had led to the contamination of the drinking water wells for the community. After extensive evaluation and testing, it was ...
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Application of a Medium Pressure UV System for the Treatment of N-Nitrosodimethylamine (NDMA)
N-nitrosodimethylamine (NDMA) was first detected in 1990 as a problem pollutant in drinking water wells at levels as high as 3,000 ppt in Elmira, Ontario, Canada. The waste from a large chemical plant over many years had led to the contamination of the drinking water wells for the community. After extensive evaluation and testing, it was determined that UV photolysis was the most effective ...
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Scale-up of a Medium Pressure UV System for the Treatment of N-Nitrosodimethylamine (NDMA) and its Advantages Over Low Pressure UV Systems
Recently there has been considerable concern in California about the detection of N-nitrosodimethylamine (NDMA) in drinking water at levels as high as 900 ppt. NDMA was found to be a carcinogen in animals and assessed as a Class 1 carcinogen. It is currently listed as a priority pollutant on the US EPA National Priorities List. California has set an 'action level' of 20 ppt for NDMA. NDMA is ...
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Occurrence and fate of
N -nitrosamines and their formation potential in three wastewater treatment plants in JapanN-nitrosamines are well known as carcinogens present in the environment. However, studies of the occurrence and fate of N-nitrosamines and their N-nitrosamine formation potential (FP) in wastewater treatment plants (WWTPs) are lacking. Therefore, the objectives of this study were to determine the occurrence of N-nitrosamines in WWTPs, the FP of N-nitrosamines on chloramination during wastewater ...
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Prediction of advanced oxidation performance in UV/H2O2 reactor systems with LP-UV lamps
Advanced oxidation processes, like UV/H2O2 oxidation, are important barriers against organic micro pollutants in drinking water treatment. In order to guarantee safe drinking water, it is important to be able to predict the reactors' performance to adjust the operating conditions to the actual influent water characteristics (like UV transmission) and lamp performance. Therefore, a design tool was ...
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US EPA UVGDM 2006 validated UV systems
As micro-organisms evolve, so too does their resistance against traditional methods of treatment. atg UV has developed a range of validated systems that fully comply with the requirements of the US EPA 2006 UVDGM (worlds' strictest validation standard). atg UV Technology has a range of UV systems that have been designed specifically for the drinking water industry, and are fully compliant with ...
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Anglian water Cryptosoridium outbreak - Case Study
Pitsford Drinking Water Site, England In June 2008, a rabbit was located in the wash water tank at the Pitsford Drinking Water Plant of Anglian Water, leading to contamination of the treatment works with Cryptosporidum, a chlorine resistant parasitic micro-organism. The parasite was detected on June 24 and, following consultation with health and local authorities, a notice to boil drinking water ...
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Retaining the natural approach for bottled and flavoured water - Case Study
The continued growth in the market for bottled waters and flavoured waters means increasing demands for water purification at formulation and packaging facilities. Demand for Water Purification is Growing The continued growth in the market for bottled waters and flavoured waters means increasing demands for water purification at formulation and packaging facilities. To ensure that ...
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Emerging Trends In UV Disinfection For Water Treatment
Introduction The UV disinfection industry has experienced tremendous growth over the last 20 years. The development of new UV technologies over this period has been a perfect example of an industry investing to meet market demand – in this case demand for an effective, low cost, and environmentally friendly disinfection technology. The acceptance of UV disinfection at water plants treating in ...
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