Treatments of plankton and Escherichia coli cells using hybrid method with water cavitation and discharge plasma

Satoshi Ihara, Hironori Itoh, Noriki Kobayashi, Yuko Inoue, Hiroaki Terato, Masaaki Tamagawa

Research output: Contribution to journalArticle

Abstract

In this study, we propose a new treatment method to sanitize ballast water contaminated with plankton and/or bacteria. This method is constituted of water cavitation and discharge plasma in this cavitation field. The 0.5% brackish water containing brine shrimp (2.5 × 104 and 1.25 × 105 m-3) was treated in 60 s. Then, we saw no surviving plankton in the treated water. Similarly, the treatment of water containing Escherichia coli cells (4 × 1015 m-3) in 120 s completed the sterilization. We also observed the DNA damage and destruction of the cellular morphology after treatment. It seems that the mechanisms of sterilization are radical reactions and physical damage caused by shockwave, and radical reactions are dominant mechanism.

Original languageEnglish
Pages (from-to)357-365
Number of pages9
JournalIEEJ Transactions on Fundamentals and Materials
Volume135
Issue number6
DOIs
Publication statusPublished - Jun 1 2015
Externally publishedYes

Keywords

  • Ballast water
  • Cavitation
  • Discharge plasma
  • Escherichia coli
  • Plankton

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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