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Inactivation of surrogate bioaerosol...

University of Colorado at Boulder., Civil Engineering.

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Inactivation of surrogate bioaerosols on clean filter media by low-current electric fields.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Inactivation of surrogate bioaerosols on clean filter media by low-current electric fields./
作者:	Lachendro, Edward J.
面頁冊數:	109 p.
附註:	Adviser: Mark T. Hernandez.
Contained By:	Masters Abstracts International46-06.
標題:	Biology, Microbiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1453568
ISBN:	9780549562627

Inactivation of surrogate bioaerosols on clean filter media by low-current electric fields.
Lachendro, Edward J.

Inactivation of surrogate bioaerosols on clean filter media by low-current electric fields. - 109 p.

Adviser: Mark T. Hernandez.

Thesis (M.S.)--University of Colorado at Boulder, 2008.

Weak electric fields have been shown to significantly enhance the capture efficiencies (approaching those of HEPA filters) of airborne particulate matter through coarse fibrous material of HVAC filters, without the associated pressure demands of HEPA filters. The low current electric fields used in these filters may also have a biocidal effect on airborne microorganisms. The mechanism(s) responsible for microbial inactivation of EEFs has not been elucidated, and the disinfection potential has not been optimized for indoor air quality applications. In this study surrogates that are commonly used to model the behavior of pathogenic bioaerosols were immobilized on ASHRAE rated filter media, placed in defined EEFs, and their response was observed. Several filter media were tested and experiments were carried out under static and air flow through conditions. EEF exposure of Bacillus subtilis (vegetative), Mycobacterium parafortuitum, and Pseudomonas aeruginosa resulted in greater than two log inactivation after 4 h, and in several experiments up to 5 log inactivation was observed. There was no obvious response of B. subtilis spores to the EEFs of this study. The results of this study showed no apparent effect of airflow on inactivation of surrogate pathogens. Results suggest that weak electric fields applied to air filtration equipment may be an effective engineering technology for rapid inactivation of vegetative cells on low-pressure drop filter media.

ISBN: 9780549562627Subjects--Topical Terms:

1017734
Biology, Microbiology.

Inactivation of surrogate bioaerosols on clean filter media by low-current electric fields.
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502 $a Thesis (M.S.)--University of Colorado at Boulder, 2008.
520 $a Weak electric fields have been shown to significantly enhance the capture efficiencies (approaching those of HEPA filters) of airborne particulate matter through coarse fibrous material of HVAC filters, without the associated pressure demands of HEPA filters. The low current electric fields used in these filters may also have a biocidal effect on airborne microorganisms. The mechanism(s) responsible for microbial inactivation of EEFs has not been elucidated, and the disinfection potential has not been optimized for indoor air quality applications. In this study surrogates that are commonly used to model the behavior of pathogenic bioaerosols were immobilized on ASHRAE rated filter media, placed in defined EEFs, and their response was observed. Several filter media were tested and experiments were carried out under static and air flow through conditions. EEF exposure of Bacillus subtilis (vegetative), Mycobacterium parafortuitum, and Pseudomonas aeruginosa resulted in greater than two log inactivation after 4 h, and in several experiments up to 5 log inactivation was observed. There was no obvious response of B. subtilis spores to the EEFs of this study. The results of this study showed no apparent effect of airflow on inactivation of surrogate pathogens. Results suggest that weak electric fields applied to air filtration equipment may be an effective engineering technology for rapid inactivation of vegetative cells on low-pressure drop filter media.
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