giardia monitoring Articles

  • Detection of Giardia and Cryptosporidium cysts/oocysts in watersheds and drinking water sources in Brazil urban areas

    The protozoan parasites Giardia and Cryptosporidium have been described as important waterborne disease pathogens, and are associated with severe gastrointestinal illnesses. The objective of this paper was to investigate the presence of Giardia cysts and Cryptosporidium oocysts in samples from watershed catchments and treated water sources. A total of 25 water samples were collected and examined ...


    By IWA Publishing

  • Comparison of three methods to concentrate Giardia cysts and Cryptosporidium oocysts from surface and drinking waters

    In this study, three methods commercialized by Pall (Envirochek HV), Idexx (FiltaMax) and Whatman (Cryptest) to concentrate Giardia cysts and Cryptosporidium oocysts from surface and drinking waters were compared according to the EPA standard protocol. Twenty litres of surface and 100 litres of drinking waters were inoculated with 103 (oo)cysts before being concentrated by ...


    By IWA Publishing

  • Monitoring and evaluation of removal of pathogens at municipal wastewater treatment plants

    The concentrations and removal of Cryptosporidium, Giardia, and microbial indicators, including somatic coliphages and fecal coliforms were investigated through the wastewater treatment processes at three municipal wastewater treatment plants in Beijing, China. The experimental results showed that the concentrations of Cryptosporidium in untreated wastewater, ...


    By IWA Publishing

  • Assessing protozoan risks for surface drinking water supplies in Nova Scotia, Canada

    Protozoa, such as Cryptosporidium parvum and Giardia lamblia, pose a human health risk when present in drinking water. To minimize health risks, the Nova Scotia Treatment Standards for surface water and groundwater under the direct influence of surface water require a 3-log reduction for Giardia cysts and Cryptosporidium oocysts. This study ...


    By IWA Publishing

  • Pathogenic parasites and enteroviruses in wastewater: support for a regulation on water reuse

    Brazilian regulations for nonpotable reuse are being established using World Health Organization guidelines, however, they should be developed based on local monitoring studies. This study intended to analyze enteroviruses, protozoa and viable Ascaris sp. eggs in raw (24) and treated (24) effluents from four Wastewater Treatment Plants of São Paulo State, Brazil. The protozoa were ...


    By IWA Publishing

  • Water Treatment Plant (Wtp) Optimization Techniques

    Introduction Given the seemingly ubiquitous, yet episodic nature of pathogen presence in source waters, monitoring and opti-mizmg the performance of water treatment plants is an increasingly important aspect in many suppliers' plans for maintaining w;ater quality . Filtration Plant Optimization (FPO) The Filtration Plant Optimization (FPO) analysis w:as ...


    By Analytical Services, Inc

  • Quantifying micro-organism removal for safe drinking water supplies

    Over the past ten years the management of microbiological drinking water quality in The Netherlands has shifted from curative administration toward a more preventative strategy. This shift in policy came as a result of the findings of reports from other developed countries which highlighted the risk from persistent pathogens such as Cryptosporidium, Giardia, some enteroviruses; and the pathogenic ...


    By IWA Publishing

  • On tap: recreational waterborne disease at an all-time high

    Levels of recreational waterborne disease are at their highest since reporting began in 1978, suggesting the need for interventions aimed at reducing risks in natural and treated water systems. More outbreaks are reported related to recreational  waterborne diesease than drinking water sources. Every two years the Centers for Disease Control and Prevention (CDC) publishes a report on waterborne ...

  • 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 ...


    By atg UV Technology

  • Case study - UV systems for spas & hydro pools

    With the rise of health centres and leisure clubs throughout the UK, a key feature in many modern facilities is the inclusion of spas and hydro pools.  As a specialist aquatic application, spas and hydro pools feature high turnover rates, high bather loads, increased turbulence and water temperatures above 35oC.  This combination of factors provides a perfect breeding ground for harmful ...


    By atg UV Technology

  • Wafer Thin UV System Lights The Way

    The long awaited ‘Wafer’ design was unveiled in October at Piscina & Wellness in Barcelona, and it comes as no surprise that this revolutionary new range has already had an enormous impact within the wet leisure industry. The inclusion of chemical-free UV disinfection is now becoming standard practise for many aquatic facilities worldwide.  UV systems protect against chlorine ...


    By atg UV Technology

  • 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 ...

  • Case study - Anglian water Cryptosoridium outbreak

    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 ...


    By atg UV Technology

  • UV disinfection for enhanced oil recovery and other oilfield applications

    One of the biggest challenges facing oil companies today is how to extract more oil from the discoveries made in the last 40 years. Estimates vary, but approximately 66% of the discovered oil gets left in the ground. The International Energy Agency has estimated that if, in the next 20 years, this figure could be reduced to 50%, then this would increase the world's recoverable oil by 1.2 trillion ...


    By atg UV Technology

  • Ultraviolet disinfection systems, the best solution to school swimming pools

    School swimming pools are a valuable asset, and are now present in the majority of high schools and higher education facilities throughout the UK.  Whilst school pools vary in size, shape and usage, many school swimming facilities are facing a common dilemma in their water disinfection strategy.  Existing treatment regimes are often badly designed, under sized or simply outdated, which ...


    By atg UV Technology

  • Shining a Light on the Food and Beverage Industry

    As published in this months edition of Process & Control, Diane White discusses how UV systems can provide a practical, power saving alternative to pasteurisation in food and beverage production Waterborne micro-organisms are responsible for adverse effects on flavour, colour, odour and shelf life of products and, of course, potential health risks to consumers. A number of emerging ...


    By atg UV Technology

  • Removal of Microorganisms from Domestic Greywater Using a Recycling Vertical Flow Constructed Wetland (RVFCW)

    ABSTRACTThe reuse of greywater (GW) is an attractive addition to water management options. One of the major concerns limiting GW reuse is the possible presence of harmful microorganisms. In addition to total coliform organisms, enteric organisms (Salmonella, Shigella and poliovirus Type 1 Cryptosporidium, Giardia) and opportunistic pathogens ( Staphylococcus aureus and Pseudomonas aeruginosa) may ...

  • Recycled Water saves California Farms

    After studies show no viable microorganisms in tertiary treated wastewater, growers in Salinas Valley now get two-thirds of their agricultural water needs from recycled sources. RECYCLED water is saving the farm for approximately 75 growers in the Salinas Valley along California’s Central Coast. Because their wells were becoming contaminated with seawater, these growers began irrigating their ...


  • 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. ...

  • Hot springs swimming pool: Glenwood Springs, Colorado case study

    Ozone Water Treatment, Color Removal and Ozone Purification In 1991, the Hot Springs Pool and Lodge Resort installed a DIN-Standard ozonation system for treating the world’s largest hot springs-fed swimming pool. The following main reasons were responsible for this decision: The suppliers of gaseous chlorine had dwindled down to a single source, as it had become ...


    By BiOzone

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