building water system Articles

  • Why Is Public Concern Muted With Legionnaires’ Disease?

    Every year in the U.S., there are an estimated 25,000 cases of Legionnaires’ disease and 4,000 deaths. ASHRAE Journal recently interviewed William F. McCoy, Ph.D., MemberASHRAE, on issues relating to Legionnaires’ disease. McCoy is a member of ASHRAE Technical Committee 3.6,Water Treatment, and the committee upgrading the ASHRAE Guideline 12, Minimizing the Risk of ...


    By Phigenics, LLC

  • Case study - US school saves almost $50,000 eliminating water softeners

    In Texas, Even though properly maintained, a conventional salt based water softener at Fort Bend ISD (Independent School District) had proven to be ineffective at preventing scale. This resulted in scaling throughout the system particularly in the kitchen / cafeteria area. The main Hobart dishwashing equipment had to be opened up and descaled every week taking up staff time and consuming ...

  • Public Health - Preventing Legionellosis

    Since it was reconginsed 30 years ago, legionellosis has affected millons of people. William F McCoy, author of a new book from IWA Publishing, looks at the steps needed to mount an effective reponse to the disease. Next year marks the 30th anniversary of the 1976 American Legion convention of military veterans held in Philadelphia, Pennsylvania. It is remembered primarily not for the ...


    By Phigenics, LLC

  • Legionellosis -- Why the Problem Continues

    This year marks the 30 th anniversary of the 1976 American Legion convention of military veterans held in Philadelphia. A mysterious disease outbreak occurred that killed 34 people and debilitated nearly another 200. The media named it Legionnaires’ Disease. In early 1977, the cause of the outbreak had been proven to be a previously unknown waterborne pathogenic bacterium ...


    By Phigenics, LLC

  • 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

  • Using Hazard Analysis and Critical Control Point Water Management Plans to Prevent Legionellosis

    ABSTRACT Legionellosis is an environmental-source disease caused by Legionella bacteria. Many such diseases are prevented using a scientifically-based risk management process called Hazard Analysis and Critical Control Point (HACCP; pronounced “Hassip”). Water Management Plans based on HACCP have been proven effective for preventing legionellosis. Perspective is given for how ...


    By Phigenics, LLC

  • Evidence Shows Need to Address Pathogenic Bacteria in U.S. Drinking Water Systems

    Legionnaires’ disease is on the rise. Unfortunately, efforts to prevent Legionnaires’ disease to date have focused on building water systems rather than the municipal water supply. Building water systems are too far downstream to correct the problem, and, as a result, these efforts have been ineffective in curbing the incidence of legionellosis. It is unrealistic to place on building ...


    By Evapco Inc.

  • We’ll cross that bridge when we … nevermind

    Climate science tells us future weather is going to be dramatically different than it is today. Exactly how different, and in what ways, is unknown, however, particularly at regional and local scales. What’s an engineer who’s designing power plants, bridges and other infrastructure meant to last for a half-century or more to do? Adopt a whole new way of working, suggests the ...


    By Ensia

  • Preventing Legionellosis - Published version

    Legionellosis is the condition of being infected by Legionella bacteria. Recent news has increased awareness about how important it is to prevent the hazard that causes legionellosis from harming people in health-care facilities. In October 2005, a $600 million class action lawsuit was filed onbehalf of legionellosis victims at the Seven Oaks Home for the Aged, along-term ...


    By Phigenics, LLC

  • A Look at the Impact of Proposed Water Standard to Prevent Legionnaires` Disease

    From the standpoint of water treatment industry experts, failure to prevent legionellosis (or Legionnaires’ Disease) is the most significant water treatment problem today. Essentially every case of the disease is the result of exposure to inadequately managed building watersystems, and both utility and potable water systems can be the source of the hazard (i.e., Legionella bacteria). In ...


    By Phigenics, LLC

  • Softeners for Shell Netherlands - The Netherlands, 1.000 m3/d - Case Study

    Project Description: Lenntech has been awarded a contract for the engineering, manufacturing and assembly for 2x 100% duplex water softening system for the Shell headquarters in The Hague city in the Netherlands. The softened water is used for the cooling towers in the building. The water softening system is equipped with top brand instrumentation and equipment. The system is ...


    By Lenntech Water Treatment

  • National monitoring of water utility performance in France

    Performance assessment has recently been applied to water utilities in France. Performance indicators (PIs) were initially developed as an aid to the control of public service delegation by local authorities. After a long process, a group of PIs was integrated into mandatory annual reports on service quality and price, in order to better inform utility users and reinforce the regulation of the ...


    By IWA Publishing

  • Method for an accelerated reproducible calcite-layering of potable water systems to validate decalcification procedures

    This article describes a method for an accelerated, controlled and reproducible build-up of limescale in potable water systems. The concept of this method is to systematically generate water with a high calcium carbonate precipitation potential (CCPP) by CO2-enrichment, hardening with CaCO3 followed by CO2-desorption. Water with a CCPP of about 100 mg/L CaCO3 led to ...


    By IWA Publishing

  • Water Resource Information System

    Bristol Water (BW) approached HL to replace an obsolete water database used to help update water resource situations reports. HL was successful with its tender which included building a new water resource information system around the HydroLog4 time-series database combined with the Open Database Toolkit. The Water Resource Planning Manager, Martin Berry wanted to replace an in-house developed ...

  • Self build in Surrey Incorporates Grey water system

    Grey isn't such a grey area It's an environmental and economic no-brainer Designing environmental criteria into home building projects is not as difficult or as expensive as it may appear, as discovered by web and graphic designer Keiran Wynyard. Keiran was determined that his self-build extension to his home in Tadworth, Surrey would meet some important environmental ...

  • Evaluation of Legionella presence in the water system of a public building by semi-nested polymerase chain reaction as a rapid screening method complementary to plate count

    The aim of this study was to apply a fast and efficient protocol for monitoring levels of Legionella contamination in high-risk water systems using molecular techniques and culture methods. Forty-nine water samples from a public building were analyzed by a culture method (BCYE agar) and a specific semi-nested polymerase chain reaction (PCR). The first 30 analyses using plate counts were ...


    By IWA Publishing

  • Grey water recycling for Internationally Renowned Merchant Bank

    New Nomura building water recycling system passes the test of time. One Angel Lane, the iconic new European headquarters of Nomura in the City of London, has a comprehensive grey water and rainwater water combined system providing 100% of water for toilet flushing on the first five floors of this eleven floor building. Installed by Aquaco in June 2008, the system is working to the ...

  • Microelectronics - Lessons learned: the installation of a 300 to 600 GPM Semiconductor High Purity Water System

    The life of a high-purity water treatment project may be compared to roll-ing a boulder down a dome-shaped hill (1). The project gets rolling with a fairly small nudge. Once it is rolling, however, it takes a great deal of effort (time and money) to change the direction or go back up the hill. The project to design, build, install, and commission the "E" high-purity water system at VLSI ...

  • Case study - Advanced

    This rainwater system does double duty, providing pressurized irrigation water while simultaneously aiding the efficiency of the building’s rooftop cooling system. Project: AdvancED Location: Alpharetta, GA Application: Landscape Irrigation and Evaporative Cooling System(s): 30,000 Gallon Underground Tank w/ H2 ...

  • VLSI chooses liqui-cel contactors over conventional vacuum tower for deaeration

    The life of a high-purity water treatment project may be compared to rolling a boulder down a dome-shaped hill (1). The project gets rolling with a fairly small nudge. Once ¡t ¡s rolling, however, ¡t takes a great deal of effort (time and money) to change the direction or go back up the hill. The project to design, build, install, and commission the “E” ...

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