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Bioaerosol inactivation using ultrav...

Ryan, Kevin Christopher Judge.

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Bioaerosol inactivation using ultraviolet germicidal irradiation in flow-through control devices.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Bioaerosol inactivation using ultraviolet germicidal irradiation in flow-through control devices./
Author:	Ryan, Kevin Christopher Judge.
Description:	36 p.
Notes:	Source: Masters Abstracts International, Volume: 47-05, page: 3042.
Contained By:	Masters Abstracts International47-05.
Subject:	Biology, General. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1464530
ISBN:	9781109146868

Bioaerosol inactivation using ultraviolet germicidal irradiation in flow-through control devices.
Ryan, Kevin Christopher Judge.

Bioaerosol inactivation using ultraviolet germicidal irradiation in flow-through control devices. - 36 p.

Source: Masters Abstracts International, Volume: 47-05, page: 3042.

Thesis (M.S.)--University of Colorado at Boulder, 2009.

Experiments were conducted using bench-scale flow-through control devices that inactivate bioaerosols. These control devices used ultraviolet germicidal irradiation, which is UV-C radiation between 100--280 nm wavelength, to inactivate bioaerosols. Microorganisms exposed to this radiation experience damage to their DNA, rendering them unable to replicate. Three UV-C sources were tested: mercury, light emitting diode (LED), and xenon, as well as two wall reflectivities. Airflow rate through the device and relative humidity (RH) were also varied. In addition to measurements, modeling was performed to predict the effectiveness of the control devices. Measurements of inactivation rate constants, defined as a microorganism's susceptibility to UV-C inactivation normalized by the incident fluence rate, of Bacillus subtilis were made. At 50% RH, B. subtilis has an inactivation rate constant of 0.062 m2/J; at 15% RH the inactivation rate constant is 0.078 m2/J. The experiments determined that a high reflectance wall coating increases the fluence rate by a factor of 1.6. Modeling results showed good agreement when compared to experimental measurements with errors of less than 20%. Once the LED and xenon prototypes improve in functionality, they can be scaled up to full-scale applications like those currently using mercury lamps, such as heating, ventilating, and air conditioning (HVAC) systems.

ISBN: 9781109146868Subjects--Topical Terms:

1018625
Biology, General.

Bioaerosol inactivation using ultraviolet germicidal irradiation in flow-through control devices.
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245 1 0 $a Bioaerosol inactivation using ultraviolet germicidal irradiation in flow-through control devices.
300 $a 36 p.
500 $a Source: Masters Abstracts International, Volume: 47-05, page: 3042.
500 $a Adviser: Shelly L. Miller.
502 $a Thesis (M.S.)--University of Colorado at Boulder, 2009.
520 $a Experiments were conducted using bench-scale flow-through control devices that inactivate bioaerosols. These control devices used ultraviolet germicidal irradiation, which is UV-C radiation between 100--280 nm wavelength, to inactivate bioaerosols. Microorganisms exposed to this radiation experience damage to their DNA, rendering them unable to replicate. Three UV-C sources were tested: mercury, light emitting diode (LED), and xenon, as well as two wall reflectivities. Airflow rate through the device and relative humidity (RH) were also varied. In addition to measurements, modeling was performed to predict the effectiveness of the control devices. Measurements of inactivation rate constants, defined as a microorganism's susceptibility to UV-C inactivation normalized by the incident fluence rate, of Bacillus subtilis were made. At 50% RH, B. subtilis has an inactivation rate constant of 0.062 m2/J; at 15% RH the inactivation rate constant is 0.078 m2/J. The experiments determined that a high reflectance wall coating increases the fluence rate by a factor of 1.6. Modeling results showed good agreement when compared to experimental measurements with errors of less than 20%. Once the LED and xenon prototypes improve in functionality, they can be scaled up to full-scale applications like those currently using mercury lamps, such as heating, ventilating, and air conditioning (HVAC) systems.
590 $a School code: 0051.
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650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Engineering, Environmental. $3 783782
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710 2 $a University of Colorado at Boulder. $b Mechanical Engineering. $3 1030435
773 0 $t Masters Abstracts International $g 47-05.
790 1 0 $a Miller, Shelly L., $e advisor
790 1 0 $a Desjardins, Olivier $e committee member
790 1 0 $a Hernandez, Mark $e committee member
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791 $a M.S.
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