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Smoke-clearing technology may come from poultry house air scrubber.

A device invented to clean dust and microorganisms from the air of poultry houses may also help people escape during fires and make it easier for firefighters to locate people in smoke-filled rooms.

The technology was originally developed by retired Agricultural Research Service (ARS) agricultural engineer and ASABE member Bailey Mitchell to trap airborne particles like dust and microbes in poultry houses. Mitchell's machine is relatively small, portable, and battery-operated. The device, called the Electrostatic Space Charge System (ESCS), has been licensed by the ARS for agricultural applications.

ESCS generates a negative electrostatic charge on dust and other airborne particles, causing them to be attracted to grounded surfaces like walls or the floor. Unlike most air cleaners, it does not require air to move through it for cleaning to occur.

Mitchell used a smoke generator to demonstrate ESCS's abilities, which gave rise to the idea that the device can clean the air of smoke just as easily as it does dust and microbes. What still needs to be tested is just how fast it can actually clear smoke to provide a reasonably clear field of vision, according to Mitchell.

By mounting the self-contained, waterproof device in areas such as stairwells or hallways, it may be able to give people a clearer path to exits in the event of a fire. In addition, since the device can also be portable, firefighters could carry one into smoke-filled buildings to make it easier to find people who have been overcome. The device is also lightweight and may be of use in clearing smoke from airplanes and trains as well. A series of tests and demonstrations to document the device's ability to clear smoke from the air is being planned.


For more information, contact Mitchell,

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Title Annotation:Update
Publication:Resource: Engineering & Technology for a Sustainable World
Date:Aug 1, 2006
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