Inactivation of Bacillus Subtilis Spores in Water Using Repetitive Surface Discharges

Sone, Toshifumi; Kadowaki, Kazunori; Nishimoto, Sogo; Kitani, Isamu

doi:10.1541/ieejfms.127.574

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…There are various methods of generating OH radicals by direct decomposition of water, such as the arrangement of electrodes near the water surface, generation of active species in bubbles under water by applying a strong electric field , and the use of cavitation or a plasma jet . In addition, there are numerous reports of the use of gas–liquid interface plasmas for the decomposition of recalcitrant organic substances or of inactivation tests for fungi and other microorganisms . The underwater discharge plasma generators proposed by us and other researchers supply microbubbles to the gas phase through a porous glass membrane, while generating a discharge at the gas–liquid interface of the bubbles formed inside the pores or on the membrane surface.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of an Underwater Plasma Source with a Porous Glass Membrane

Shiomitsu

Sakoda

2015

Elect Comm in Japan

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SUMMARYThe advanced oxidation process (AOP) with hydroxyl radicals (OH) is considered to be useful for water purification through oxidation; therefore, we proposed an underwater plasma source with a porous glass membrane which performed the functions of bubble supply and the formation of microdischarges. We observed bubble formation and light emission from discharges on the surface of the membrane using a high-speed camera and a spectroscope, respectively. In addition, the dependence of gas pressure on the generation of OH radical and the decomposition of recalcitrant organic matter were examined. The obtained results showed that AOP may be more effective when the operating gas pressure is set higher than a pressure which could form bubbles. C⃝

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Section: Introductionmentioning

confidence: 99%

Characteristics of an Underwater Plasma Source with a Porous Glass Membrane

Shiomitsu

Sakoda

2015

Elect Comm in Japan

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“…Many researchers have studied discharges in systems using water, for example, discharges in water, [15][16][17][18][19] discharges on water surface, [20][21][22] and others. [23][24][25] The discharge with the water-ceramic electrode is entirely different from the discharges in these previous works.…”

Section: Introductionmentioning

confidence: 99%

Nonmetallic Arc Electrode Composed of Water and Ceramic

Deguchi

2008

jjap

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A novel nonmetallic arc electrode named the water-ceramic electrode, which is a combination of water and a ceramic component, is demonstrated. In the water-ceramic electrode, water and the ceramic component are exposed to the discharge space. The metal electrode is completely covered with water and is not exposed to the arc plasma. Under discharge, the ceramic component locally becomes incandescent, where the arc column terminates. The functions of the water and ceramic component are considered to be analogous to those of molten wax and the wick of a candle, respectively. The most remarkable feature of the water-ceramic electrode is that the ceramic component, which is a natural insulator and a representative heatproof material, becomes easily incandescent and locally melts with only an electric discharge.

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