drinking water disinfection system Articles
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A comparison of the Eulerian and particle tracking approaches for prediction of ozone contactor performance
The Eulerian and particle tracking approaches, two commonly utilized numerical methods, were evaluated for modelling drinking water ozone disinfection systems. The Eulerian approach predicts disinfection performance by solving an advection-diffusion equation. Alternatively, the particle tracking (Lagrangian) approach calculates disinfection efficiency by numerically introducing particles into the ...
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Australian Drinking Water Guidelines
The Australian Drinking Water Guidelines (ADWG) were developed to provide regulations that ensure drinking water safety. Drinking water under the guidelines is described as water used for human consumption, and it is obtained through a tap or food made using water. It also ensures that water quality meets the intended purpose of use. The National Health and Medical Research Council (NHMRC) works ...
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Supply system factors associated with microbiological drinking water safety in regional New South Wales, Australia, 2001–2007
Aim: To determine factors associated with microbiological safety of public drinking water systems in regional New South Wales (NSW), Australia. Method: We analysed 107,000 end-user drinking water samples for an association between detection of Escherichia coli and drinking water system features, sample year and season using NSW Health Drinking Water Monitoring Program data, 2001–2007. We used ...
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Chemically modified chitosan polymers for bromate removal
Bromate is a harmful byproduct formed during drinking water disinfection processes. In this work, adsorption of bromate by natural chitosan and its chemically modified polymers has been investigated. Bromate adsorption was found between 22.73 mg/g and 43.48 mg/g. Adsorbents were analysed by Fourier transform infrared-ATR spectroscopy. It is suggested that chemical adsorption is the main ...
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A computational fluid dynamics analysis of placing UV reactors in series
Ultraviolet (UV) light water treatment reactors are commonly used in both wastewater and drinking water disinfection. UV technology can effectively inactivate a large number of pathogens at low UV doses, however adenovirus requires a substantially higher dose than most pathogens of interest. In order to meet adenovirus inactivation requirements, UV reactors are often placed in series and the ...
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Application of solar disinfection for treatment of contaminated public water supply in a developing country: field observations
A sustainable and low-cost point-of-use household drinking water solar disinfection (SODIS) technology was successfully applied to treat microbiologically contaminated water. Field experiments were conducted to determine the efficiency of SODIS and evaluate the potential benefits and limitations of SODIS under local climatic conditions in Karachi, Pakistan. In order to enhance the efficiency of ...
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40 years on: what do we know about drinking water disinfection by-products (DBPs) and human health?
2014 marks the 40th anniversary of the seminal discovery by Johannes Rook, in 1974, that trihalomethanes (THMs) were formed by the chlorination of natural organic matter (NOM) in drinking water. Since this discovery, which revolutionized how we viewed drinking water safety and quality, hundreds of other classes of disinfection by-products (DBPs) have been discovered. The finding in 1976 by the ...
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The effect of immobilized catalyst structure on the degradation of chemical and biological contaminants in simulated solar photocatalytic water purification
The performance of different configurations of titanium dioxide-coated foam supports as photocatalysts in an enhanced solar disinfection system for drinking water treatment was evaluated, using the reduction of methylene blue, 1-4-dioxane, and Escherichia coli as performance indicators. Reactors with immobilized catalysts were able to match or surpass the performance of a suspension ...
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Organophosphate Pesticide Degradation Under Drinking Water Treatment Conditions
Chlorpyrifos (CP) was used as a model compound to develop experimental methods and prototype modeling tools to forecast the fate of organophosphate (OP) pesticides under drinking water treatment conditions. CP was found to rapidly oxidize to chlorpyrifos oxon (CPO) in the presence of free chlorine. The primary oxidant is hypochlorous acid (HOCl); thus, oxidation is more rapid at lower pH (i.e., ...
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Introduction to Ozone for Water Treatment
An ozone water treatment system reduces contaminants using the oxidative power of ozone. Ozone is created in ozone generators and is used to treat water. The ozone is then injected into the water and immediately eliminates contaminants, such as bacteria, viruses, and metals. This article is an introduction to ozone water treatment. ...
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Removing Ammonia in Drinking Water With AccuFAS
Read on to learn how, utilizing its pilot reactor, Brentwood helped a mid-sized suburban community assess potential treatment of ammonia in the city’s potable water source. What is Ammonia? Ammonia is a naturally occurring compound found in some chemical products, fertilizers, and as a byproduct of the degradation of organic materials such as manure and urine. Its high solubility means ...
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JXCT Water Quality Detector
JXCT major in different kinds of water quality analyzer,water quality tester,water quality monitor , water quality instrument and water quality detector, it can detect water PH value, residual chlorine, turbidity, suspended solids, COD, BOD, conductivity, dissolved oxygen and other parameters to achieve “river and lake water”, “drinking water”, “domestic ...
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Survival of pathogens in drinking water plumbing systems: impact factors and sanitation options
The objective was to determine impact factors that would allow Pseudomonas aeruginosa and Legionella pneumophila to survive sanitation measures of household drinking water systems. Therefore, different disinfectant concentrations were tested under different operating conditions in close-to-practice experiments. Particular attention was paid to the viable but non-culturable (VBNC) state of the ...
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Effects of phosphorus on biofilm disinfections in model drinking water distribution systems
Drinking water biofilm development is affected by the available nutrient levels and the presence of disinfectants. Phosphorus is recognized as another important limiting nutrient besides organic carbon. In this study, drinking water biofilms were developed in annular reactors to examine the effects of phosphorus on the biofilm disinfections with free chlorine and monochloramine. Phosphorus ...
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UVT 101: UV Transmittance Monitoring for UV Disinfection
ABOUT UVT UV transmittance, UV transmission or UVT is a measurement of the amount of ultraviolet light (commonly at 254 nm due to its germicidal effect) that passes through a water sample compared to the amount of light that passes through a pure water sample. To measure UVT, ultraviolet light at 254 nm is passed through a 10 mm quartz cell containing the sample water. The intensity of attenuated ...
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Drinking water standard revision catches up with UV-LED
New criteria for microbial reduction An international standard on drinking water treatment has been updated following developments and the roll-out of UV-LED (ultraviolet-light emitting diode) technology. NSF International, the body accredited by the American National Standards Institute (ANSI), has established new criteria for the use of UV-LED technology for microbial reduction. The standard ...
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