Journal of Environmental Biology

Disinfection of Klebsiella pneumoniae using ultrasonic systems

Filiz Bayrakcı Karel*

Department of Environmental Engineering, Anadolu University, Eskisehir?26555, Turkey

*Corresponding Author E-mail: fbayrakci@anadolu.edu.tr

Publication Data

Paper received:

06 January 2016

Revised received:

02 March 2016

Re-revised received:

25 April 2016

Accepted:

29 April 2016

Abstract

Disinfection process applied for suppling drinking water plays an important role in public health by preventing the spread of infectious diseases. A number of studies on alternative disinfection technologies, such as ultrasound, is increasing due to various disadvantages of the current water disinfection techniques (such as chlorination, ozone, and UV radiation) that are widely applied for the prevention of pathogenic microorganism borne epidemic diseases. For the ultrasonic disinfection applications being developed to be used in water treatment, their activities on various pathogenic microorganisms must be examined. The effects of applied power, media ions and dissolved gases in water during ultrasonic disinfection should be investigated. In this study, Klebsiella pneumoniae disinfection was performed in continuous (USR22C) and batch (USR22B) reactors operated at an ultrasonic frequency of 22 kHz at powers of 36, 67 and 95 W for an initial bacteria concentration of 1-2 x 10⁵ CFU ml^-1. The effect of sulphate, nitrate, bicarbonate ions and nitrogen gas in water on ultrasonic disinfection was investigated. As a result of this study, it was determined that 99% (2log) removal of Klebsiella pneumoniae from the water can be performed with ultrasonic disinfection, and the media ions and nitrogen gas are effective in ultrasonic disinfection.

Key words

Water disinfection, Klebsiella pneumoniae, Ultrasonic systems, Media ions, Nitrogen gas 

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