Pulsed corona discharge in water for coli bacteria inactivation

Dors, M.; Metel, E.; Mizeraczyk, J.; Marotta, Ester

doi:10.1109/icdl.2008.4622538

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…It was found that the number of surviving E. coli was about 2 × 10 3 mL −1 after direct plasma treatment for 10 s and decreased to the colony counting method detection limit of 10 mL 1 after 30 s, showing a 6-log reduction in the concentration of bacteria. As shown in Figure 8, the bactericidal effect of treatment with AALCA was significantly higher than the bactericidal effect of treatment with NEAPRS and APPJ, corona, or DBD discharges reported elsewhere [9,43,[49][50][51][52][53][54][55][56]. It was confirmed by thermographic observation that the suspension was heated by irradiation to temperatures up to 38 • C, which is below the temperature harmful for E. coli reported elsewhere, suggesting that heating of the sample was not involved in the sterilization process [57].…”

Section: Inactivation Of E Colimentioning

confidence: 58%

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

et al. 2019

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In this work, we developed a portable device with low production and operation costs for generating an ambient air low-current arc (AALCA) that is transferred to the surface of a treated liquid. It was possible to generate a stable discharge, irrespective of the conductivity of the treated liquid, as a sequence of corona, repeating spark, and low-current arc discharges. The estimated concentration of reactive oxygen and nitrogen species (RONS) in plasma-treated water (PTW) produced using AALCA treatment was two orders of magnitude higher than that of PTW produced using conventional He nonequilibrium atmospheric pressure plasma jets or dielectric barrier discharges. The strong bactericidal effect of the treatment using AALCA and the water treated using AALCA was confirmed by survival tests of Escherichia coli. Further, the possibility of treating a continuous flow of liquid using AALCA was demonstrated.

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Section: Inactivation Of E Colimentioning

confidence: 58%

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

et al. 2019

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“…12). Note that energy efficiencies for the inactivation of bacteria in clear water previously reported ranged from 3.3 to 33.3 kJ/L for 1-log reduction, depending on types of plasma used, for example, corona, capillary discharge and dielectric barrier discharge (DBD) [33][34][35], and 0.34 kJ/L for 1-log reduction for pulsed spark discharge [36].…”

Section: Discussionmentioning

confidence: 99%

Inactivation of bacteria by the application of spark plasma in produced water

Kim

Wright

Piccioni

et al. 2015

Separation and Purification Technology

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The objective of the present study was to investigate the effectiveness of spark plasma discharges on the inactivation of acid-producing bacteria (APB) and sulfate-reducing bacteria (SRB) in produced water. Tests were conducted in both static batch mode and once-through flow mode.The residual effect of plasma treatment was assessed by two different protocols: immediate incubation after plasma treatment and incubation after 24-hr storage in a tank post-treatment. In the batch test, 10-min plasma treatment of water showed a total 3-log reduction of APB and 2log reduction of SRB based on cfu/mL data in the case of clear produced water. In the oncethrough flow test, 2-log reduction of APB was observed in the case of clear produced water, whereas 1-log to 1.5-log reductions were observed in the case of darkly opaque produced water.The energy efficiency for the once-through flow test with APB for the opaque produced water was 1.7 kJ/L per 1-log reduction. UV radiation together with active plasma species produced by the spark discharge was instrumental in the inactivation of APB and SRB in both clear and dark produced water.

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Section: Discussionmentioning

confidence: 99%

“…There have been a number of studies on E. coli inactivation by other types of plasma such as corona, capillary and DBD discharges directly in water [9,[50][51][52][53][54][55][56]. D-value, which can be defined as the energy cost per L per 1-log reduction (i.e., 90 %), varied from 3.3 to 33.3 kJ/L per 1-log reduction [52][53][54]. The D-value obtained with a 3-dimensional GAD in the present study in 20-L water was 0.57 kJ/L per 1-log reduction for 16-min treatment case, indicating that the present GAD method of bacterial inactivation showed at least 5.7 times more energyefficient than those systems reported in the literature [9,[50][51][52][53][54][55][56].…”

Section: Discussionmentioning

confidence: 99%

Residual effects and energy cost of gliding arc discharge treatment on the inactivation of Escherichia coli in water

Kim¹,

Lee²,

Fridman³

et al. 2014

International Journal of Heat and Mass Transfer

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The present study investigated the residual effect of gliding arc discharge (GAD) treatment on the inactivation of bacteria in a large volume of water (i.e., 20 L). Pure water and air were introduced to GAD separately, and then both the gas and water treated by plasma were sent to bacteria-containing water. Water contaminated by Escherichia coli (E. coli) was first treated by GAD for 10, 13 and 16, and 25 min and then stored for the next 4 h, during which time the E. coli concentration and pH were measured. In general, GAD produced the strong anti-microbial properties, a phenomenon which increased with plasma treatment time. More specifically, E. coli was partially inactivated (i.e., approximately 2.7-log reduction) with 16-min plasma treatment. However, E. coli was almost completely inactivated (over 99.9 % with 5-log reduction) during the subsequent 4-h storage period, a phenomenon that was attributed to the residual effect of the plasma treatment. The optimum plasma energy cost of the GAD treatment to inactivate E. coli in 20-L water in the present study was found to be approximately 0.57 kJ/L per 1-log reduction.

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Pulsed corona discharge in water for coli bacteria inactivation

Cited by 10 publications

References 13 publications

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

Inactivation of bacteria by the application of spark plasma in produced water

Residual effects and energy cost of gliding arc discharge treatment on the inactivation of Escherichia coli in water

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