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:: Volume 7, Number 5 (winter 2017) ::
j.health 2017, 7(5): 611-620 Back to browse issues page
The Effect of Ultrasonic Waves on Dewaterability of Excess Sludge
F Golbabaei Kootenaei, N Mehrdadi, G Nabi Bidhendi, H Amini Rad
Babol Noshirvani University of Technology
Abstract:   (682 Views)

Background & Objectives: Sludge treatment and dewatering processes in wastewater treatment plants are one of the most important challenges for professionals and officials. The purpose of this study was to determine the effect of low wavelength and high energy ultrasonic waves to improve sludge dewatering properties and the optimum operating parameters of the ultrasonic method.

Methods: In this research variables include ultrasound density (0.375, 0.75, 1, 1.3 and 2.5w/m), time (1, 5, 10, 15 and 30 min), and amount of sonificated sludge (10, 15, 20, 50 and 100%). In this research effect of the variables on capillary suction time (CST) and sludge dewatering capacity were studied.

Results: The experiments determined that the optimum operating parameters as; sonification time=5 minutes, ultrasound density=1 W/ml, and amount of sonificated sludge equal to 15% at frequency of 20 kHz. Under these conditions CST was measured as 86 seconds.

Conclusion: Based on the results of this research, ultrasound waves could improve sludge dewatering process and can increase the treatment rate.

Keywords: Dewaterability, Waste Sludge, Ultrasonic Waves, Capillary Suction Time.
Full-Text [PDF 204 kb]   (427 Downloads)    
Type of Study: Research | Subject: General
Received: 2016/12/11 | Accepted: 2016/12/11 | Published: 2016/12/11
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Golbabaei Kootenaei F, Mehrdadi N, Nabi Bidhendi G, Amini Rad H. The Effect of Ultrasonic Waves on Dewaterability of Excess Sludge. j.health. 2017; 7 (5) :611-620
URL: http://healthjournal.arums.ac.ir/article-1-1092-en.html
Volume 7, Number 5 (winter 2017) Back to browse issues page
مجله سلامت و بهداشت Journal of Health
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