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Rapid inactivation of airborne bacteria using atmospheric pressure dielectric barrier grating discharge
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|Title: ||Rapid inactivation of airborne bacteria using atmospheric pressure dielectric barrier grating discharge|
|Authors: ||Gallagher Jr., Michael J.|
Gangoli, Shailesh Pradeep
Vasilets, Victor N.
Gutsol, Alexander F.
Milovanova, Tatyana N.
Murasko, Donna M.
Fridman, Alexander A.
|Keywords: ||Airbornemicroorganism;Air Sterilization;Dielectric Barrier Discharge;E. Coli;Nonthermal Plasma|
|Issue Date: ||Oct-2007|
|Publisher: ||Institute of Electrical and Electronics Engineers (IEEE)|
|Citation: ||IEEE Transactions on Plasma Science, 35(5): pp. 1501-1510.|
|Abstract: ||Dielectric barrier discharge plasma has been known
to inactivate many different microorganisms on surfaces when
treatment times are on the order of seconds or minutes in duration.
In this paper, a unique plasma air cleaning facility was created
which combines a dielectric barrier grating discharge (DBGD)
with a filterless laboratory-scale ventilation system and is used
to treat concentrated bacterial bioaerosol in a moving air stream
at air flow rates of 25 L/s. Results indicate that plasma treatment
times on the order of milliseconds corresponding to one
pass through the DBGD device can achieve 1.5-log reduction in
culturable E. coli immediately after contact with plasma and 5-log
reduction totally following in the minutes after the plasma treatment.
A numerical characterization study was performed to help
predict and understand the mechanism of bacteria inactivation in
the DBD plasma from a variety of plasma factors.|
|Appears in Collections:||Faculty Research and Publications (MEM)|
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