INACTIVATION OF <i>E. COLI</i> IN WATER BY NANOSECOND PULSED HIGH VOLTAGE AIR DISCHARGE

TAO Zhan; SUN Ming; HUANG Shu-zhou

doi:10.13205/j.hjgc.202009012

Volume 38 Issue 9

Nov. 2020

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TAO Zhan, SUN Ming, HUANG Shu-zhou. INACTIVATION OF E. COLI IN WATER BY NANOSECOND PULSED HIGH VOLTAGE AIR DISCHARGE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 71-75,230. doi: 10.13205/j.hjgc.202009012

Citation:

TAO Zhan, SUN Ming, HUANG Shu-zhou. INACTIVATION OF E. COLI IN WATER BY NANOSECOND PULSED HIGH VOLTAGE AIR DISCHARGE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 71-75,230. doi: 10.13205/j.hjgc.202009012

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INACTIVATION OF E. COLI IN WATER BY NANOSECOND PULSED HIGH VOLTAGE AIR DISCHARGE

doi: 10.13205/j.hjgc.202009012

Institute of Electrostatics, Shanghai Maritime University, Shanghai 201306, China

Received Date: 2019-06-14

Abstract

Abstract

In this paper, a nozzle-plate-cylinder reactor was developed and the effect of different factors on inactivation rate of the Escherichia coli(E. coli)in the water with the nanosecond negative pulsed air discharge at atmospheric pressure were investigated. The air flow was injected into the reactor through the discharge nozzle. The active species flow were produced in the discharge process and carried by the air flow to reach the the liquid. The results showed that the inactivation rate increased with the rise of discharge voltage, the pulse repetition rate and the discharge duration time. It increased firstly and then decreased with the air flow rate and decreased with the diameter of the electrode. The inactivation rate reached 91% when a 1.30 mm diameter electrode was adopted under the discharge duration time of 12 min, the disharge peak voltage of -32 kV, repeat frequenty of 80 Hz, and the air flow rate of 80 mL/min.
- nozzle-plate-tube reactor,
- atmospheric pressure,
- nanosecond negative pulse,
- air discharge,
- sterilization

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