DC corona discharges in air for bio-decontamination of glass surface from Escherichia coli
Kovaľová Z., Tarabová B., Leroy M., Odic E., Kirkpatrick M.J., and Machala Z.
22nd International Symposium on Plasma Chemistry, Antwerp (Belgium), July 5-10, p. USB (2015)
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Abstract: Corona discharges in air in positive and negative polarity were used for bio-decontamination of glass surfaces from planktonic Escherichia coli and its biofilm. In order to enhance the bactericidal effect of the plasma, water was electrosprayed from a hollow electrode onto the sample for either half or the entire treatment time. The best bio-decontamination efficiency of 4.5 log was achieved with electrospray during 20 min of treatment by positive streamer corona. Our first results on E. coli biofilm treatment are presented and a possible loss of biofilm biomass is measured. In order to better understand the processes of bacteria inactivation, the electrosprayed water was chemically analysed.
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