Impacts of Ultrasound and Ozone Disinfection of WWTPs Secondary Effluent

Abstract:

Disinfection is the essential and final process of municipal wastewater treatment plant. The aim of this study was to investigate the impact of ultrasound on ozone disinfection effect. The results showed that combination of ozone and ultrasound can enhance the disinfection efficiency. After ultrasound combined with ozone treatment (US/O₃) for 5min, a 2.51 log reduction of fecal coliform and a 2.24 log reduction of total bacteria were achieved. As the ultrasound power density increased from 0 to 55 W/L, a 2.59 log reduction of fecal coliform and a 2.36 log reduction of total bacteria were achieved. However, as the power density increased to 99 W/L, the increase in the overall efficiency of disinfection was not obvious. Moreover, with frequency at 20 kHz, 28 kHz and 40 kHz, 2.49, 2.58, 2.62 log reductions of fecal coliform and 2.14, 2.46, 2.51 log reductions of total bacteria were achieved, respectively.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 1735-1738
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.1735
• Online since: December 2012
• Authors: Yuan Zhao, Zi Fu Li, Yang Zhang
• Keywords: Ozone, Synergistic Disinfection, Ultrasound (US), Wastewater

References

[1] M.D. Gómez-López ,J. Bayo , M.S. García-Cascales and J.M. Angosto: Journal of Cleaner Production, 2009. 17(16): pp.1504-1511.

DOI: 10.1016/j.jclepro.2009.06.008

[2] E. Huertas, M. Salgot, J. Hollender, S. Weber, W. Dott, S. Khan, A. Schäfer, R. Messalem, B. Bis, A. Aharoni and H. Chikurel: Desalination, 2008. 218(1-3): pp.120-131.

DOI: 10.1016/j.desal.2006.09.032

[3] Mounaouer Brahmi, N.H.B.H., Helmi Hamdi and Abdennaceur Hassen: Journal of environmental Sciences, 2010. 22(8): pp.1218-1224.

[4] Pei Xu, Marie-Laure Janex, Philippe Savoye, Arnaud Cockx and Valentina Lazarova : Water Research, 2002. 36(4): pp.1043-1055.

DOI: 10.1016/s0043-1354(01)00298-6

[5] G.H.R. Silva, L.A. Daniel, H. Bruning and W.H. Rulkens: Bioresource Technology, 2010. 101(18): pp.6981-6986.

DOI: 10.1016/j.biortech.2010.04.022

[6] Urs von Gunten: Water Research, 2003. 37(7): pp.1443-1467.

[7] K.K. Jyoti and A.B. Pandit: Biochemical Engineering Journal, 2004. 18(1): pp.9-19.

[8] Sonia B. Martínez, Jerónimo Pérez-Parra and Ricardo Suay: Water Resour Manage, 2011. 25: pp.2109-2124.

DOI: 10.1007/s11269-011-9798-x

[9] Le Zeng and James W. McKinley: Journal of Hazardous Materials, 2006. 135(1-3): pp.218-225.

[10] Hao Wu, Zifu Li, Xin Jin, Xin Zhao and Furong Deng: Advanced Materials Research, 2012. 433-440: pp.4751-4756.

[11] Guihua Xu, Shaohua Chen, Jianwen Shi, Shumei Wang and Gefu Zhu: Journal of Hazardous Materials, 2010. 180(1-3): pp.340-346.

[12] Linda K. Weavers, Frank H. Ling and Michael R. Hoffmann:Environ. Sci. Technol, 1998. 32(18): pp.2727-2733.