Showing results for: ultraviolet water disinfection Articles
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Lighting the way for UV disinfection - Case study
Pharmaceuticals manufacturing involves the handling of powders and volatile, flammable solvents such as iso-propanol. Consequently there is every opportunity for explosive atmospheres to form. Pharmaceuticals manufacturing involves the handling of powders and volatile, flammable solvents such as iso-propanol. Consequently, there is every opportunity for explosive atmospheres to form. ...
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Comparison of ultraviolet light emitting diodes with traditional UV for greywater disinfection
The current technological status of ultraviolet light emitting diodes (UV-LEDs) has reached a point where small-scale ultraviolet (UV) water disinfection applications, that is, for greywater reuse appear increasingly promising. This study compares the germicidal and economical aspects of UV-LEDs with traditional UV. Pure cultures and environmental greywater samples were exposed to different ...
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A pulsed light system for the disinfection of flow through water in the presence of inorganic contaminants
The use of ultraviolet (UV) light for water disinfection has become increasingly popular due to on-going issues with drinking water and public health. Pulsed UV light has proved to be an effective form of inactivating a range of pathogens including parasite species. However, there are limited data available on the use of pulsed UV light for the disinfection of flowing water in the absence or ...
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Urban wastewater reuse: a pilot plant experience
The results of a preliminary verification of domestic wastewater reusability in L'Aquila (Italy) are reported. A Tertiary Treatment Pilot Plant (TTPP), rotary filtration and Ultraviolet (UV) Radiation disinfection, was added to an Urban WasteWater Treatment Plant (UWWTP) to test the compliance with water quality indicated for reuse by the enforced Italian regulation. The TTPP was managed varying ...
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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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Common Types of UV Lamps for Ultraviolet Disinfection of Water & Wastewater
When it comes to water and wastewater treatment systems, operational and performance variation will come from different components. This variance can come from the differences treatment processes deployed, whether chemicals are utilized or how much power the treatment processes require. With many treatment systems, there is much consideration given to a particular central component akin to the ...
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Everything You Need to Know About UV Water Purification
If you draw water from a well or lake and are concerned about its quality, a UV Water purification system might give you the peace of mind your water is safe to use. Households on municipal water systems are not completely safe either, as water main breaks and broken pipes which can lead to water contamination occur frequently. The ultraviolet water purification process uses ultraviolet light or ...
By AquaBSafe
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UV Photolysis of Nitrate: Effects of Natural Organic Matter and Dissolved Inorganic Carbon and Implications for UV Water Disinfection
Nitrite (NO2-) formation during ultraviolet (UV) photolysis of nitrate was studied as a function of pH and natural organic matter (NOM) concentration to determine water-quality effects on quantum yields and overall formation potential during UV disinfection of drinking water with polychromatic, medium-pressure (MP) Hg lamps. Quantum yields measured at 228 nm are approximately 2 times higher than ...
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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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Some unique solutions to water, wastewater challenges
Challenges are not unique to water and wastewater treatment, but the challenges thrown at operators and managers often require equal parts of thoughtfulness and creativity, with dashes of patience and persistence. This is why the industries are “home to some of the most ingenious professionals to be found in any industry,” according to an editorial in Treatment Plant Operator. ...
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Advanced engineering for ATEX solutions
The process of disinfecting water with UV light is a proven technology for drinking and process water in many industries, however the high standards required by the offshore industry command these systems to be engineered way beyond the normal specification of many manufacturers. When a leading offshore contractor based in Malaysia required two high specification ATEX systems for operation in ...
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Evaluation of ultrasound technology for the disinfection of process water and the prevention of biofilm formation in a pilot plant
In this study, we investigated the use of ultrasound for the disinfection of process water as an alternative for more traditional techniques, like chlorination and UV-irradiation. A pilot plant was constructed to mimic circulating process water in industrial environments. The disinfection efficiency of ultrasound was assessed and compared to UV-treatment and chlorination. In addition, the ...
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Method to determine the power efficiency of UV disinfection plants and its application to low pressure plants for drinking water
In this paper we present a method to determine the power efficiency of ultraviolet (UV) disinfection plants and apply this to low pressure plants for drinking water. In UV disinfection plants the water flow is regulated to ensure that microorganisms receive the necessary fluence for inactivation while passing through. The flow depends on the UV transmission (UVT) of the water. The lower the ...
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Rainwater recycling for HM Aylesbury Prison
Rainwater recycling system for Aylesbury prison Aylesbury Prison, in Buckinghamshire, will cut its mains water usage in its new block by up to 50%, thanks to its new Aquaco rainwater recycling system. The rainwater recycling system will include 2 X 6,750 litre GRP collection tanks, water filtration and UV disinfection units. The recycling system is controlled by an Aquaco Master Control Unit ...
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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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The biological safety of distribution systems following UV disinfection in rural areas in Beijing, China
In rural areas, UV disinfection has a great potential for drinking water treatment because of the ability to achieve target disinfection levels and the ease of operation and maintenance; however, UV disinfection provides no disinfection residual to the water distribution system. This study examines the biological safety of rural water distribution systems following UV disinfection. The results ...
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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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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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Offshore water injection - Case Study
Client: PPCoN Location: North Sea Description: UV disinfection of seawater for offshore reservoir injection The process of disinfecting water with UV light is a proven technology for drinking and process water in many industries. It has now been applied with great success to the disinfection of seawater for use well injection water. atg UV Technology understanding of UV disinfection combined ...
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Standardised UV disinfection skid packages for offshore potable water treatment - Case Study
In response to the DWI guidance, atg UV Technology have developed a range of standardised UV skid package solutions, specifically designed for the quick and easy replacement of non-conforming UV equipment. The process of disinfecting water with UV light is a proven technology, and has been widely used throughout the offshore petrochemical sector for crew drinking water supplies for over 30 ...
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