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| Experimental study of Escherichia coli killed by hydrodynamic cavitation due to circular multi-orifice plates |
| LIU Chang, DONG Zhi-Yong, CHEN Le, ZHANG Xi, ZHANG Kai |
| College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China |
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Abstract Water samples containing Escherichia coli was treated by a hydrodynamic cavitation device with circular multi-orifice plates. The inactivation effects of hydrodynamic cavitation on Escherichia coli in water was experimentally studied by detecting the killing rate. The effects of initial concentration of Escherichia coli, cavitation number, orifice velocity, orifice arrangement, orifice number, orifice size and cavitation time on the killing rates were analyzed. The experimental results showed that increasing the orifice velocity, lowering cavitation number, choosing the appropriate initial concentration, improving the cavitation time, increasing the orifice number, decreasing the orifice size and improving orifice arrangement can further increase the killing rates of Escherichia coli in water.
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Received: 08 January 2016
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