Non-thermal plasma disinfection of Escherichia coli on almond

Shaobo Deng; Roger Ruan; Chul Kyoon Mok; Guangwei Huang; Paul Chen

Non-thermal plasma disinfection of Escherichia coli on almond

Shaobo Deng, Roger Ruan, Chul Kyoon Mok, Guangwei Huang, Paul Chen

Research output: Contribution to conference › Paper › peer-review

Abstract

This study was done to investigate the applicability of non-thermal plasma (NTP) technology for the disinfection of almond. Almonds were spiked by selected microorganisms with dipping in E. coli culture broth followed by drying. The spiked almonds were treated with NTP at various operating conditions for different duration of treatment. The sterilization pattern of the microorganisms was analyzed. NTP was very effective on disinfection of E. coli on almond, showing almost 5-log reduction after 30 s treatment at 30 kV and 2,000 Hz. The NTP disinfection effect against E. coli on almond increased with the voltage and the frequency. The NTP sterilization of E. coli followed the 1^st order reaction kinetics, and the sterilization rate constants varied with almond types and grades. The E. coli cells at logarithmic phase were more sensitive to the NTP than those at stationary and declining phases.

Original language	English (US)
State	Published - 2005
Event	2005 ASAE Annual International Meeting - Tampa, FL, United States Duration: Jul 17 2005 → Jul 20 2005

Other

Other	2005 ASAE Annual International Meeting
Country/Territory	United States
City	Tampa, FL
Period	7/17/05 → 7/20/05

Keywords

Almond
Disinfection
E. Coli
Non-thermal plasma

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title = "Non-thermal plasma disinfection of Escherichia coli on almond",

abstract = "This study was done to investigate the applicability of non-thermal plasma (NTP) technology for the disinfection of almond. Almonds were spiked by selected microorganisms with dipping in E. coli culture broth followed by drying. The spiked almonds were treated with NTP at various operating conditions for different duration of treatment. The sterilization pattern of the microorganisms was analyzed. NTP was very effective on disinfection of E. coli on almond, showing almost 5-log reduction after 30 s treatment at 30 kV and 2,000 Hz. The NTP disinfection effect against E. coli on almond increased with the voltage and the frequency. The NTP sterilization of E. coli followed the 1st order reaction kinetics, and the sterilization rate constants varied with almond types and grades. The E. coli cells at logarithmic phase were more sensitive to the NTP than those at stationary and declining phases.",

keywords = "Almond, Disinfection, E. Coli, Non-thermal plasma",

author = "Shaobo Deng and Roger Ruan and Mok, {Chul Kyoon} and Guangwei Huang and Paul Chen",

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TY - CONF

T1 - Non-thermal plasma disinfection of Escherichia coli on almond

AU - Deng, Shaobo

AU - Ruan, Roger

AU - Mok, Chul Kyoon

AU - Huang, Guangwei

AU - Chen, Paul

PY - 2005

Y1 - 2005

N2 - This study was done to investigate the applicability of non-thermal plasma (NTP) technology for the disinfection of almond. Almonds were spiked by selected microorganisms with dipping in E. coli culture broth followed by drying. The spiked almonds were treated with NTP at various operating conditions for different duration of treatment. The sterilization pattern of the microorganisms was analyzed. NTP was very effective on disinfection of E. coli on almond, showing almost 5-log reduction after 30 s treatment at 30 kV and 2,000 Hz. The NTP disinfection effect against E. coli on almond increased with the voltage and the frequency. The NTP sterilization of E. coli followed the 1st order reaction kinetics, and the sterilization rate constants varied with almond types and grades. The E. coli cells at logarithmic phase were more sensitive to the NTP than those at stationary and declining phases.

AB - This study was done to investigate the applicability of non-thermal plasma (NTP) technology for the disinfection of almond. Almonds were spiked by selected microorganisms with dipping in E. coli culture broth followed by drying. The spiked almonds were treated with NTP at various operating conditions for different duration of treatment. The sterilization pattern of the microorganisms was analyzed. NTP was very effective on disinfection of E. coli on almond, showing almost 5-log reduction after 30 s treatment at 30 kV and 2,000 Hz. The NTP disinfection effect against E. coli on almond increased with the voltage and the frequency. The NTP sterilization of E. coli followed the 1st order reaction kinetics, and the sterilization rate constants varied with almond types and grades. The E. coli cells at logarithmic phase were more sensitive to the NTP than those at stationary and declining phases.

KW - Almond

KW - Disinfection

KW - E. Coli

KW - Non-thermal plasma

UR - http://www.scopus.com/inward/record.url?scp=70349114646&partnerID=8YFLogxK

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M3 - Paper

AN - SCOPUS:70349114646

T2 - 2005 ASAE Annual International Meeting

Y2 - 17 July 2005 through 20 July 2005

ER -

Non-thermal plasma disinfection of Escherichia coli on almond

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