Inactivation and removal of Enterobacter aerogenes biofilm in a model piping system using plasma-activated water (PAW)

Juzhong Tan, Mukund V. Karwe

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Plasma-activated water (PAW) was explored as a clean-in-place agent for inactivating biofilms of Enterobacter aerogenes on the inner surface of a model piping system. Abilities of PAW or chlorine solution or distilled water to inactivate the biofilm (~1 × 108 CFU/cm2) attached to the pipe inner surface were compared. Distilled water flowing at 0.11 m/s through the piping system reduced the Enterobacter aerogenes counts on the surface by 0.35, 0.2, and 0.2 log CFU/cm2 on the tees, elbows, and tubing, respectively. However, PAW reduced the E. aerogenes counts on tees, elbows, and tubing by 3.0, 3.2, and 3.8 log CFU/cm2, respectively, which were similar to 100-ppm chlorine water. Increasing the flow velocity to 0.22 m/s made only small difference in terms of biofilm removal. The antimicrobial effect of PAW for Enterobacter aerogenes biofilm on the inner surface of a piping system was comparable to 100-ppm of chlorine solution.

Original languageEnglish (US)
Article number102664
JournalInnovative Food Science and Emerging Technologies
Volume69
DOIs
StatePublished - May 2021

All Science Journal Classification (ASJC) codes

  • Food Science
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

Keywords

  • Biofilm
  • Clean-in-place
  • Piping system
  • Plasma-activated water

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