cryptosporidium barrier Articles

  • Cryptosporidium; Understanding the Hidden Danger

    Found in water supplies all over the globe, Cryptosporidium outbreaks are now becoming more and more frequent causing severe illness that can be fatal to vulnerable groups such as the young and elderly and in a number of cases has lead to costly and drawn out legal action. The problem is, whilst disinfection with chlorine effectively destroys other pathogens - it takes less than one minute to ...


    By atg UV Technology

  • Hodder WTW - Actiflo for Cryptosporidium removal

    United Utilities 83-week Programme 112,000 m3/day Max Flow The Client United Utilities are the 2nd largest water company in England / Wales. They are responsible for an area in the north west of the UK, which includes major cities such as Manchester and Liverpool. The Client's Needs ...


  • Case study - cryptosporidium – understanding the hidden danger

    Understanding the problem Found in water supplies all over the globe, Cryptosporidium outbreaks are now becoming more and more frequent causing severe illness that can be fatal to vulnerable groups such as the young and elderly and in a number of cases has lead to costly and drawn out legal action.  The problem is, whilst ...


    By atg UV Technology

  • Cryptosporidium – Understanding the hidden danger case study

    Understanding the problem Found in water supplies all over the globe, Cryptosporidium outbreaks are now becoming more and more frequent causing severe illness that can be fatal to vulnerable groups such as the young and elderly and in a number of cases has lead to costly and drawn out legal action. The problem is, whilst disinfection with chlorine effectively destroys other ...


    By atg UV Technology

  • UV Experience for Inactivating Cryptosporidium in Surface Water Plants

    The disinfection of pathogenic microbes in drinking water has been largely successful over the last century due to the use of chlorination. However, research conducted in the 1970's revealed that by-products formed during the chlorination process are potentially carcinogenic and that there is a direct correlation between the concentration of chlorination by-products and the probability of certain ...

  • Impact of kaolinite clay particles on the filtration of Cryptosporidium-sized microspheres

    Granular filtration remains a key barrier for Cryptosporidium removal in water treatment plants without UV irradiation. To assess the impact of clay particles in source water on Cryptosporidium removal efficiency by granular filtration, this study investigated the co-transport of Cryptosporidium-sized microspheres and kaolinite particles in sand columns. To ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • Case study - Closed-vessel vs.open channel

    Ultraviolet disinfection is now a standard feature in most waste water treatment 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 favoured due to its non-chemical nature, the fact that no subsequent de-chlorination process is required, and its ability to be ...


    By atg UV Technology

  • Drinking water treatment, AFM replaces sand in sand filters

    Drinking Water Treatment by AFM, 30% - 80 improvement in sand filter performance Cryptosporidium problem and THM's eliminated. All sand filter will suffer to some degree from bacterial fouling. The alginates excreted by the bacteria cause coagulation of the sand grains which in turn leads to wormhole channeling of water through the filter bed. The worm holes provide a conduit for the ...


    By Dryden Aqua Ltd

  • Pathogen inactivation during passage of stormwater through a constructed reedbed and aquifer transfer, storage and recovery

    A study was undertaken to determine the potential inactivation rates of selected enteric microorganisms in captured urban stormwater within a constructed reedbed and in tertiary carbonated aquifer during an Aquifer Storage, Transfer and Recovery (ASTR) scheme. The study was undertaken in-situ in the constructed reedbed and aquifer using diffusion chambers. The results showed that all tested ...


    By IWA Publishing

  • Characterising aquifer treatment for pathogens in managed aquifer recharge

    In this study the value of subsurface treatment of urban stormwater during Aquifer Storage Transfer Recovery (ASTR) is characterised using quantitative microbial risk assessment (QMRA) methodology. The ASTR project utilizes a multi-barrier treatment train to treat urban stormwater but to date the role of the aquifer has not been quantified. In this study it was estimated that the aquifer barrier ...


    By IWA Publishing

  • Estimating the risk from sewage treatment plant effluent in the Sydney catchment area

    This study employed Quantitative Microbial Risk Assessment (QMRA) to estimate the gastrointestinal risks associated with Cryptosporidium and Giardia discharged from three STPs located within the Lake Burragorang catchment. The QMRA considered baseline and various hazardous event scenarios (e.g. plant failure and heavy rainfall). Under baseline conditions, the combined effect of ...


    By IWA Publishing

  • Evaluating a composite cartridge for small system drinking water treatment

    A pilot-scale evaluation was conducted at the U.S Environmental Protection Agency (EPA) Test & Evaluation (T&E) Facility in Cincinnati, Ohio, on a multi-layer, cartridge-based system that combines physical filtration with carbon adsorption and ultraviolet (UV) light disinfection to serve as a home-base water treatment security device against accidental or intentional contaminant events. The ...


    By IWA Publishing

  • Characterising aquifer treatment for pathogens in managed aquifer recharge

    In this study the value of subsurface treatment of urban stormwater during Aquifer Storage Transfer Recovery (ASTR) is characterised using quantitative microbial risk assessment (QMRA) methodology. The ASTR project utilizes a multi-barrier treatment train to treat urban stormwater but to date the role of the aquifer has not been quantified. In this study it was estimated that the aquifer barrier ...


    By IWA Publishing

  • Using UV for Simultaneous Disinfection and Control of Unpleasant Tastes and Odors in Drinking Water

    Algae blooms in surface water sources often lead to off-tastes and odors in finished drinking water. Because public confidence in overall drinking water quality is closely related to aesthetic quality, there is increasing interest in solving taste and odor issues.  UV-oxidation, the combination of UV and hydrogen peroxide, offers the ability to treat taste and odor (T&O) while simultaneously ...

  • Case study - Ainslie Park Leisure Centre

    5 years on: atg UV systems stand the test of time Ainslie Park Leisure Centre 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 ...


    By atg UV Technology

  • atg UV stand the test of time

    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 ...


    By atg UV Technology

  • UV, a bright future for the water industry

    The use of Ultra Violet (UV) light has now become standard practice in most municipal waste water treatment processes.  Effluent is now starting to be recognised as a valuable resource, not a problem that needs to be dumped. Many waste water facilities are being renamed as water reclamation facilities, and whether the waste water is being discharged into a river, being used to irrigate ...


    By atg UV Technology

  • UV set to dominate the municipal industry

    The use of Ultra Violet (UV) light has now become standard practice in most municipal waste water treatment processes. Effluent is now starting to be recognised as a valuable resource, not a problem that needs to be dumped.  Many waste water facilities are being renamed as water reclamation facilities, and whether the waste water is being discharged into a river, being used to irrigate ...


    By atg UV Technology

  • Advanced Water Treatment Technologies May Bring Purified Water to San Diego

    'In four years, half of San Diego may be filling its glasses with tap water that once ran through its toilets,' reported the San Diego Union-Tribune recently. A plan to mix 'repurified water' with the City's raw drinking water reservoir could become a reality, thanks to the wonders of water treatment technology. Such a possibility elicits various reactions including disgust, marvel and fear. ...

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