Non-thermal plasma disinfection of Escherichia coli on almond

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

Research output: Contribution to conferencePaperpeer-review

7 Scopus citations


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.

Original languageEnglish (US)
StatePublished - 2005
Event2005 ASAE Annual International Meeting - Tampa, FL, United States
Duration: Jul 17 2005Jul 20 2005


Other2005 ASAE Annual International Meeting
Country/TerritoryUnited States
CityTampa, FL


  • Almond
  • Disinfection
  • E. Coli
  • Non-thermal plasma


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