Inhibition of corrosion causing Pseudomonas aeruginosa using plasma-activated water

Eleni Asimakopoulou, Sotiriοs Ι. Εkonomou, P Papakonstantinou, Olena Doran, Alexandros Ch. Stratakos

Research output: Contribution to journalArticlepeer-review

Abstract

Aims: The cost of Microbiologically Influenced Corrosion (MIC) significantly affects a wide range of sectors. This study aims to assess the efficiency of a novel technology based on the use of plasma-activated water (PAW) in inhibiting corrosion caused by bacteria. 

Methods and Results: This study evaluated the effectiveness of PAW, produced by a plasma bubble reactor, in reducing corrosion causing Pseudomonas aeruginosa planktonic cells in tap water and biofilms were grown onto stainless steel (SS) coupons. Planktonic cells and biofilms were treated with PAW at different discharge frequencies (500–1500 Hz) and exposure times (0–20 min). P. aeruginosa cells in tap water were significantly reduced after treatment, with higher exposure times and discharge frequencies achieving higher reductions. Also, PAW treatment led to a gradual reduction for young and mature biofilms, achieving >4-Log reductions after 20 min. Results were also used to develop two predictive inactivation models. 

Conclusions: This work presents evidence that PAW can be used to inactivate both planktonic cells and biofilms of P. aeruginosa. Experimental and theoretical results also demonstrate that reduction is dependent on discharge frequency and exposure time. 

Significance and Impact of the Study: This work demonstrates the potential of using PAW as means to control MIC.

Original languageEnglish
Pages (from-to)2781-2794
Number of pages14
JournalJournal of Applied Microbiology
Volume132
Issue number4
Early online date30 Nov 2021
DOIs
Publication statusE-pub ahead of print - 30 Nov 2021

Bibliographical note

Funding Information:
This work was supported by the University of West of England ‐Bristol internal funding awarded to Alexandros Ch. Stratakos.

Publisher Copyright:
© 2021 The Society for Applied Microbiology

Keywords

  • plasma-activated water
  • biofilm
  • intracellular ATP levels
  • P. aeruginosa
  • microbial corrosion
  • Biotechnology
  • Applied Microbiology and Biotechnology
  • General Medicine
  • P
  • aeruginosa

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