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Related Experiment Videos

Cooling towers and evaporative condensers.

R P Miller

    Annals of Internal Medicine
    |April 1, 1979
    PubMed
    Summary

    Legionnaires' disease bacteria were found in cooling tower water near disease outbreaks. These devices can release contaminated water droplets into the air, potentially spreading the bacteria.

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    Area of Science:

    • Environmental microbiology
    • Public health
    • Engineering

    Background:

    • Legionnaires' disease outbreaks have been linked to cooling towers.
    • Cooling towers facilitate water-air contact, potentially absorbing airborne contaminants.
    • Airstreams from cooling towers contain water vapor and fine droplets (drift).

    Purpose of the Study:

    • To investigate the presence of Legionnaires' disease bacteria in cooling tower water samples.
    • To understand the potential role of cooling towers in disease transmission.

    Main Methods:

    • Isolation of Legionnaires' disease bacterium from water samples.
    • Analysis of water from cooling towers and evaporative condensers near epidemic sites.

    Main Results:

    • Four confirmed instances by October 1978 linked Legionnaires' disease bacterium to cooling tower water.
    • Cooling towers and condensers are common heat rejection devices with significant water-air interaction.

    Conclusions:

    • Cooling towers can harbor Legionnaires' disease bacteria.
    • The design and operation of cooling towers may contribute to the environmental spread of the bacteria.

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