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Determination of the Rate Constant of Microorganisms Destruction after Ultrasound Water Treatment and Different Gases Action

Iryna Koval1
Affiliation: 
1 Lviv Polytechnic National University, 12 S. Bandery St., Lviv 79013, Ukraine irynazk@gmail.com
DOI: 
https://doi.org/10.23939/chcht16.04.652
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Keywords:

Abstract: 
The change of microorganisms number (rod-like spore-containing Bacillus cereus bacteria type) for the range of 102 ÷ 106 CFU in 1 cm3 from the duration of simultaneous action of ultrasound (US) cavitation and the nature of different gas (carbon dioxide, oxygen, argon) is presented. The graphical dependences of the effective rate constant values of microorganisms destruction (kd) on its initial number per unit volume of water at different modes of its treatment are shown. The destruction degrees of bacterial cells in the process of water purification are calculated. It was investigated that the value of kd does not depend on the initial number of cells in water, but depends on the nature of the bubbled gas through the reaction aqueous medium: kd(Ar/US) > kd(O2/US) > kd(CO2/US).
References: 

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