The aim of this research gliding arch is to inactivate the Escherichia coli bacteria by the use of gliding arc plasma. For this purpose, 70 ml of LB media containing the Escherichia coli bacteria (each sample contains 10 ml) are treated in times of 0, 5, 10, 20,40, 60, and 90 seconds by using a1 kilowatt gliding arc plasma with distance of 6 cm from the surface of sample. The results showed that because of the high power of device, the inactivation time deceases to below than 10 seconds considerably compared with the other methods like the plasma jet and the dielectric barrier discharge and after this time, the variation of optical density becomes negligible. Furthermore, the pH of sample reduces by increasing the treatment time. The utilized system is more economical compared with the other systems because it doesn’t need to career gases such as helium, argon, and nitrogen to generate the plasma and operate by the air plasma.

Keywords: Escherichia coli bacteria, Gliding arc plasma, Inactivation, Water treatment.

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