Journal article
Residual effects and energy cost of gliding arc discharge treatment on the inactivation of Escherichia coli in water
International journal of heat and mass transfer, v 77, pp 1075-1083
01 Oct 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The present study investigated the residual effect of gliding arc discharge (GAD) treatment on the inactivation of bacteria in a large volume of water (i.e., 20 L). Pure water and air were introduced to GAD separately, and then both the gas and water treated by plasma were sent to bacteria-containing water. Water contaminated by Escherichia coli (E. coli) was first treated by GAD for 10, 13 and 16, and 25 min and then stored for the next 4 h, during which time the E. coli concentration and pH were measured. In general, GAD produced the strong anti-microbial properties, a phenomenon which increased with plasma treatment time. More specifically, E. con was partially inactivated (i.e., approximately 2.7-log reduction) with 16-min plasma treatment. However, E. coli was almost completely inactivated (over 99.9% with 5-log reduction) during the subsequent 4-h storage period, a phenomenon that was attributed to the residual effect of the plasma treatment. The optimum plasma energy cost of the GAD treatment to inactivate E. coli in 20-L water in the present study was found to be approximately 0.57 kJ/L per 1-log reduction. (C) 2014 Elsevier Ltd. All rights reserved.
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Details
- Title
- Residual effects and energy cost of gliding arc discharge treatment on the inactivation of Escherichia coli in water
- Creators
- Hyoung-Sup Kim - Drexel Univ, Dept Mech Engn & Mech, Philadelphia, PA 19104 USAD. H. Lee - Jeonbuk National UniversityAlexander Fridman - Drexel UniversityYoung I. Cho - Drexel University
- Publication Details
- International journal of heat and mass transfer, v 77, pp 1075-1083
- Publisher
- Elsevier
- Number of pages
- 9
- Grant note
- 11122-31 / RPSEA through the "Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources" program
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000340302400098
- Scopus ID
- 2-s2.0-84903995890
- Other Identifier
- 991019168202804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Mechanical
- Mechanics
- Thermodynamics