Title: Evaluating the impact of operating parameters on biocidal effects of pulsed ultrasound in natural water disinfection
Abstract: The knowledge available in the literature regarding the use of pulsed ultrasound for water disinfection is limited. Hence, this study was designed to provide a thorough investigation for the application of pulsed ultrasound disinfection in water treatment. High power low frequency pulsed ultrasound was used to disinfect natural water samples. Two levels of power, treatment time and
On/Off ratio (R) of 40% and 70% amplitudes, 5 and 15 min and 0.2:0.1 and 0.1:0.6, respectively were tested. To scrutinize the effect of the operating parameters on pulsed ultrasound disinfection efficiency,rigorous statistical analyses were performed applying factorial design of 23. Total coliform Quantification was applied as a measure
for disinfection efficiency. It was found that increasing power, treatment time or both had a positive effect on total coliform reduction, whereas increasing the off period of pulsed ultrasound resulted in lower total coliform reduction. The disinfection effects of 2-way interaction of power * R and 3-way interaction of power * treatment
time * R were statistically insignificant (P > 0.05). Linear regression model was developed for predicting total coliform reduction under pulsed ultrasound effect. Cost analyses of the treatments were also conducted.
Publication Year: 2015
Publication Date: 2015-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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