water disinfection system Articles
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Development and evaluation of a small scale water disinfection system
Provision of microbiologically safe drinking water for people living in the rural areas of developing countries remains a major challenge to date. A simple gravity-driven membrane point of use system was developed based on woven fabric microfiltration (WFMF) membranes. The WFMF is a loose type of membrane (0.45 μm). However, complete disinfection is not achieved with the WFMF, hence it was ...
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Evaluation of Inactivation of Cryptosporidium parvum Oocysts in Recreational
Purpose: To determine the ability of the Hanovia UVP 61 water disinfection system to nactivate Cryptosporidium parvum oocysts suspended in recreational (water park) water.Methods and materials:Test water: The water used for this test was from the Adventure Island water park, Tampa, Florida. A 200 gallon (750 L) volume had been collected on October 24, 1999, and delivered to Clancy 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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Waste Water -Yangsan City, South Korea
Hanovia Photon Systems Installation Date – 2004. System Configuration – Four Hanovia Photon PMD500T12 Systems, complete with UV Monitors, Lamp Power Switching / Dose Control, Programmable Automatic Quartz Sleeve Wiper System. Variable flow: Up to 1,625m3/hr per stream Total Plant Capacity: 6,500 m3/hr Secondary treated filtered: UV Transmittance 60 % in 10 mm cell at 254 ...
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Reference: Mauritius – heaven on earth
This island in the Indian Ocean is one of the top destinations in the world for luxury tourism. This is why the management of the successful Beachcomber Hotels places its trust in ProMinent's hi-tech systems for sea water desalination and disinfection systems for pool water. Extensive expertise for complex tasks The Trou aux Biches Resort & Spa on the north-west coast of Mauritius is ...
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Risk assessment and water safety plan: case study in Beijing, China
Two typical rural water utilities in Beijing, China were chosen to describe the principles and applications of water safety plans (WSP), to provide a methodological guide for the actual application and improve the quality of rural drinking water quality, and to establish an appropriate method for WSP applied in rural water supply. Hazards and hazardous events were identified and risk assessment ...
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Importance of measuring UV transmittance (UVT) for UV disinfection
UV disinfection systems disinfect water using UV light at the 254 nm wavelength. UV light at this wavelength actually destroys the DNA of microbiological material in the water which prevents dangerous viruses such as cryptosporidium and e-coli from reproducing and causing harm. UV Disinfection Dose and UV Transmittance (UVT) The effectiveness of a UV disinfection system is determined by the UV ...
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Removal of bacteria, protozoa and viruses through a multiple-barrier household water disinfection system
Municipal water disinfection systems in some areas are not always able to meet water consumer needs, such as ensuring distributed water quality, because household water management can be a contributing factor in water re-contamination. This fact is related to the storage options that are common in places where water is scarce or is distributed over limited time periods. The aim of this study is ...
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Maintenance strategies for on-site water disinfection by ultraviolet lamps on dairy farms
Bacteria have been detected in many water supplies on dairy farms, and the water used to wash milking equipment should be free of bacteria. This study evaluated two ultraviolet (UV) technologies, with and without automatic sleeve cleaning device, as on-farm water disinfection system. No fouling was observed during 6 months of continuous operation of the self-cleaning UV system. The dose provided ...
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Ozone Water Disinfection Cost - Spend only 0.03 cents/m³ on Your Treated Water
Here are the calculations of the ozone water disinfection cost when using Absolute Ozone Generators The government requirement to assure complete water disinfection is 0.2-0.4 ppm of ozone dissolved in water. First, let us accept a target concentration of 0.5 ppm, so there is some contingency. Also, I suggest for the purpose of this calculation of the ozone water disinfection cost a system, which ...
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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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Development of recreational water spray ground design regulations in New York State, an engineering approach
The New York State Department of Health developed regulations for the design and operation of spray grounds to address the potential for recreational water illnesses associated with this type of venue. The water treatment component of the new regulation was based on a first-principles approach to address the unique challenges of spray grounds. The regulation departs from traditional ...
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Factors involved in sustained use of point-of-use water disinfection methods: a field study from Flores Island, Indonesia
Many scientific studies have suggested that point-of-use water treatment can improve water quality and reduce the risk of infectious diseases. Despite the ease of use and relatively low cost of such methods, experience shows the potential benefits derived from provision of such systems depend on recipients' acceptance of the technology and its sustained use. To date, few contributions ...
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Closed vessel or open channel UV disinfection systems
Ultra violet disinfection is now a standard feature in most waste water disinfection systems. UV has also been adopted by the drinking water community, as a barrier against the chlorine tolerant species such as Cryptosporidium and Giardia. The technology is widely favored due to its non- chemical nature, the fact that no subsequent de-chlorination process is required, and its ability to be ...
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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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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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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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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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Antibacterial properties of Ag and Ag/AgCl nanoparticles from radish and tea extracts for water treatment applications
Silver nanoparticles (AgNPs) have antibacterial properties and are widely used for water disinfection. This technology is commercially applied in point-of-use water treatment as a post-treatment for filtrate water. However, the current process of synthesizing AgNPs has several disadvantages including the use of hazardous chemicals, consumption of a large amount of energy and the formation of ...
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BioLargo Spotlight: Advanced Oxidation System (AOS) Versus Waterborne Viruses
Hello, my name is Dr. Laura Patterson-Fortin, lead for BioLargo Water’s disinfection R&D team in Edmonton. My team has previously reported many exciting results using the AOS for water disinfection. In today’s blot post, I hope to inform our shareholders and followers of some really positive recent results we’ve achieved in virus disinfection, and to share a little bit on ...
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