Synergistic Effect of Ultrasound Cavitation and Gas in the Water Disinfection

Iryna Koval1 (pp 575-582)
Affiliation: 
1 LvivРolytechnic National University, 12 Bandera St., Lviv 79013, Ukraine irynazk@gmail.com
DOI: 
https://doi.org/10.23939/chcht15.04.575
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Abstract: 
The paper considers water purification processes from Bacillus bacteria type under the conditions of gases bubbling only (argon, helium, oxygen, and carbon dioxide), cavitation and combined action of gas and cavitation. The synergistic effect was found under conditions of simultaneous action of gas and cavitation (kd(gas/US ) >kd(gas) + kd(US) almost double) and it was shown that kd(gas/US) >kd(gas) by almost an order of magnitude. Relative series of effective destruction of microbial cells was established: Ar/US > О2/US >Не/US > СО2/US. Destruction degree of the cells reaches 70 %at the short-term Ar/US exposure (~8 min), which is 7 times more active than cavitation action and 13.5 times more than bubbling of Aralone.
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