The effect of sonication on microbial disinfection using hypochlorite

H. Duckhouse; T. J. Mason; S. S. Phull; J. P. Lorimer

doi:10.1016/j.ultsonch.2004.01.031

The effect of sonication on microbial disinfection using hypochlorite

H. Duckhouse, T. J. Mason, S. S. Phull, J. P. Lorimer

SonoChem Centre Ltd

Research output: Contribution to journal › Article › peer-review

87 Citations (Scopus)

Abstract

Ultrasound alone is capable of killing bacteria when sufficient power is applied but ultrasound at low powers can also be used to improve the effectiveness biocides. In this paper, we explore the effect of the timing of the ultrasonic treatment at 20 and 850 kHz on the biocidal efficiency of sodium hypochlorite solution towards Escherchia coli suspensions. A remarkable frequency effect has been noted. At the lower frequency of 20 kHz the improvement in biocidal activity is greatest when the ultrasound is applied at the same time as the hypochlorite. At the higher frequency of 850 kHz the improvement is best when ultrasound is used as a pre-treatment immediately followed by hypochlorite addition under normal (silent) conditions. The kill rate achieved for pre-treatment using 850 kHz and simultaneous treatment using 20 kHz are very similar. However the former involves less acoustic energy and so is considered to be the more efficient.

Original language	English
Pages (from-to)	173-176
Number of pages	4
Journal	Ultrasonics Sonochemistry
Volume	11
Issue number	3-4
Early online date	Feb 2004
DOIs	https://doi.org/10.1016/j.ultsonch.2004.01.031
Publication status	Published - May 2004

Keywords

Environmental protection
Power ultrasound
Water treatment

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Environmental Chemistry
Radiology Nuclear Medicine and imaging
Acoustics and Ultrasonics
Organic Chemistry
Inorganic Chemistry

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Cite this

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AU - Mason, T. J.

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The effect of sonication on microbial disinfection using hypochlorite

Abstract

Keywords

ASJC Scopus subject areas

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