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| Titel |
E.coli inactivation by high frequency ultrasound |
| VerfasserIn |
Andriana F. Aravantinou, Ioannis D. Manariotis, Constantinos V. Chrysikopoulos |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250073823
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| Zusammenfassung |
| A very important stage in water and wastewater treatment processes is disinfection, which
protects the public from pathogenic biocolloids (microorganisms). Several quite different
disinfection technologies have been proposed and tested throughout the years, each
possessing unique advantages and drawbacks. Microbial inactivation by ultrasound provides
a unique combination of simultaneously acting mechanisms including mechanical effects
capable of disrupting cell membranes, chemical effects (including generation of active free
radicals), and heat effects (i.e. generation of local hot spots). The aim of this work is
to examine the efficiency of ultrasound irradiation on the inactivation of model
bacteria. The strain of E.coli CN13 was selected for this purpose, because E. coli is a
bacterium, which is usually found in raw and secondary treated municipal wastewater.
Numerous E.coli CN13 inactivation experiments were conducted with different
initial concentrations using an ultrasound frequency of 582 kHz. The experimental
data were analyzed by various previously developed kinetic models. The results
showed that bacteria inactivation was depended on the initial concentration and
the rate of inactivation decreases with decreasing initial bacterial concentration. |
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