TiO₂-coated electrodes for pulsed electric field treatment of microorganisms

Qin, Si and Timoshkin, Igor V. and MacLean, Michelle and MacGregor, Scott J. and Wilson, Mark P. and Given, Martin J. and Wang, Tao and Anderson, John G. (2016) TiO₂-coated electrodes for pulsed electric field treatment of microorganisms. IEEE Transactions on Plasma Science, 44 (10). pp. 2121-2128. ISSN 1939-9375 (https://doi.org/10.1109/TPS.2016.2571628)

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Abstract

Pulsed electric fields (PEF) can cause irreversible damage to bio-membranes and may result in inactivation of microorganisms. The aim of this paper is to investigate the PEF treatment of the yeast Saccharomyces cerevisiae, using a novel treatment cell with parallel-plane electrodes coated with a 2 µm thin TiO2 film. Two different PEF waveforms, square and exponential, with magnitudes of 67 kV/cm and 80 kV/cm, were used in this study. The efficacy of the PEF treatment was assessed by comparison of the surviving treated and untreated yeast populations, and it was shown that a treatment cell with TiO2-coated electrodes can be successfully used for the PEF treatment of microorganisms: 3-log10 reduction in the yeast population was achieved with 100 impulses. The energy efficacy of the PEF process in the proposed treatment cell has been compared with the energy losses in the PEF treatment cell with uncoated, conductive electrodes. It is shown that the electrodes coated with TiO2 provide better performance as compared with the traditional uncoated electrodes.

ORCID iDs

Qin, Si ORCID logoORCID: https://orcid.org/0000-0001-8616-6121, Timoshkin, Igor V. ORCID logoORCID: https://orcid.org/0000-0002-0380-9003, MacLean, Michelle ORCID logoORCID: https://orcid.org/0000-0001-5750-0397, MacGregor, Scott J. ORCID logoORCID: https://orcid.org/0000-0002-0808-585X, Wilson, Mark P. ORCID logoORCID: https://orcid.org/0000-0003-3088-8541, Given, Martin J. ORCID logoORCID: https://orcid.org/0000-0002-6354-2486, Wang, Tao ORCID logoORCID: https://orcid.org/0000-0003-3054-0772 and Anderson, John G. ORCID logoORCID: https://orcid.org/0000-0003-4151-1619;
  • Item type:Article
    ID code:56616
    Dates:
    Date
    Event
    31 October 2016
    Published
    1 June 2016
    Published Online
    15 May 2016
    Accepted
    Notes:Published as part of a special issue, "Pulsed Power Science & Technology". (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:07 Jun 2016 10:17
    Last modified:11 Nov 2024 11:26
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/56616
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