cooling tower legionella Articles

  • Cooling tower legionella pneumophila study CDC

    Abstract Since the late 1970s, there have been many small and large outbreaks of Legionnaires’ disease. Most of these outbreaks have been traced to either cooling tower water systems or potable water systems. Although the bacteria most often associated with Legionnair’s disease, Legionella pneumophila, is present in many waater systems, outbreaks are usually a result of ...


    By Zentox Corporation

  • Enumeration of Legionella pneumophila in cooling tower water systems

    Legionella pneumophila, the causative agent of Legionnaires disease, is known to colonise and frequently grow in cooling tower waters. Disease is acquired by inhaling aerosol contaminated by legionellae. Determination of the count of Legionella pneumophila in cooling tower waters may, therefore, be useful for risk assessment. In our survey, 103 water samples from 50 cooling towers were examined ...


    By Springer

  • Optimised Legionella protection for cooling towers - Enhanced safety in five steps

    Poorly maintained cooling towers and evaporative condensers, coupled with old pipe systems or boilers,are one of the breeding grounds that can contribute to the spread of Legionella-containing aerosols. Plant operators can significantly reduce this risk in just five steps. The use of anti-bacterial packing materials of the type supplied by Enexio is a key cornerstone here. One problem that has ...

  • About TecH2O

    Who is cleaning your cooling tower? With warmer weather on the way, it will soon be time to put cooling towers back into service.  According to legislation passed by New York State effective 11/15/2015, “All owners shall ensure that all cooling towers are cleaned and disinfected when shut down for more than five days” and “any person who performs cleaning and ...


    By TecH2O

  • Legionnaires’ disease (Legionella pneumophila)-sometimes deadly, sometimes not!

    More than 90% of Legionella cases are caused by Legionella pneumophila, a bacterium that thrives in warm to hot water.  Pipes, tanks, faucets, showerheads, and hot water heaters are ideal breeding grounds for L. pneumophila.  Since infection with Legionella occurs through inhaling the bacterium, any activity in which contaminated water can be misted and subsequently inhaled can lead to ...

  • Cooling tower case study

    Cooling towers have always been difficult to control. Algae grow in the cooling tower itself and on the grids used. In addition to micro-organisms and biofilm, they reduce the efficiency of the cooling tower. Furthermore the risk of spreading Legionella is a serous factor to be reckoned with. Many of the traditional methods to fight algae are either insufficient, cumbersome, environmentally ...


    By LG Sonic

  • Antibiotic susceptibility of Legionella strains isolated from public water sources in Macau and Guangzhou

    The purpose of this study was to investigate the susceptibility of waterborne strains of Legionella to eight antimicrobials commonly used in legionellosis therapy. The minimum inhibitory concentrations (MICs) of 66 environmental Legionella strains, isolated from fountains and cooling towers of public facilities (hotels, schools, and shopping malls) in Macau and Guangzhou, ...


    By IWA Publishing

  • Biofilms reduce cooling tower efficiency, increase cost, and create a biohazard

    Definition: Biofilm is a gelatinous layer that forms in cooling water systems on heat transfer surfaces, fill material, and basins. Biofilm consists of microbial cells, the polysaccharide biopolymer they produce, and debris extracted from the recirculating cooling water. Problems Caused by Biofilm: Physical plugging of cooling tower fill, tubes, and water passages Accelerated ...

  • Hospital cooling tower application

    The Challenge: One of the largest teaching hospitals in Illinois wanted to improve safety and “green” operations in their cooling tower water treatment chemical regimen without sacrificing effectiveness. The Solution: Replacement of bulk bleach with on-site generated MIOX® mixed oxidant solution, Earthwise reduced the hospital's liability from ...

  • Trace2o and Holland Water in New Partnership

    Holland Water and Trace2O sign production agreement around unique sensor Leading provider of water safety solutions, Holland Water, has granted the exclusive contract for the production of their Silco® Sensor to Trace2O, a major manufacturer of high-tech monitoring systems. James Gardiner of Holland Water and Trace2O’s Managing Director, Geoff Douglas, signed the production agreement on ...


    By Trace2o ltd

  • 6 Things You Should Know About Legionella

    Just last August, about 120 people in the South Bronx were infected with Legionnaires’ Disease and 12 people died. At the time, up to 5 cooling towers in the area tested positive for Legionella, a fatal bacteria that grows in warm, damp environments and can spread once contaminated water has become aerosolized and the vapor is inhaled. In this post, we’ll be discussing where ...

  • Five questions to Henk Janssen, technical director of Watco Group

    Five questions to Henk Janssen, technical director of Watco Group, water-cooling engineer with 35 years of experience under the belt on the future of water cooling. This episode on cooling towers. What attracted you to pursue a career in water cooling in the first place? Mainly it was the opportunity to travel all over the ...


    By WATCO Group PTE LTD

  • Prevalence study of Simkania negevensis in cooling towers in Spain

    Simkania negevensis is an obligate intracellular bacterium grouped into the order Chlamydiales. This new amoeba-resistant intracellular bacterium might represent a novel etiologic agent of bronchiolitis and community-acquired pneumonia and occurs in aquatic habitats such as drinking water and reclaimed wastewater. Another amoeba-related bacterium, Legionella pneumophila, is an ...


    By IWA Publishing

  • Process cooling in Singapore case study

    Chemical free Scale and Legionella prevention by Fluid Dynamics Introduction The client, Sunstream International is a company specialising in plastics sheet extrusion. Sunstream were installing a new extrusion line in their existing factory. The line has two chillers and a 50RT cooling tower positioned on the roof space. Space was at a premium and also previous ...

  • Legionnaires is an Air Quality Risk

    The recent Bronx, NY outbreak of Legionnaires infections is a grim reminder of the deadliness of this strain of pneumonia. Like many of the outbreaks, cooling towers caused this one. Twenty have been identified but the search is still going on. Over 120 people were infected and 12 have died. Tragically it affects the most vulnerable people–people with one or more immune system deficiencies. ...


    By ProMark Associates, Inc.

  • IAQ investigators often overlook Bacteria as the Root Cause of Occupant Complaints

    Untitled Document Many investigators have been dealing with mold issues the last few years and may have been overlooking bacteria as the underlying microbial problem. Bacteria ...


    By EMSL Analytical, Inc.

  • ASHRAE Standard 188P: Prevention of Legionellosis Associated with Building Water Systems

    For Presentation at the AWT 2011 Convention and Exposition  The American Society of Heating, Refrigerating and Air-conditioning Engineers (ASHRAE) has developed a proposed Standard Practice that specifies what is required to prevent legionellosis associated with building water systems. Standard 188P is a “Practices” standard – not a “Design” or ...


    By Phigenics, LLC

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