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Influence of Different Combination Modes of UV and Chlorine on Inactivation Effect of Escherichia Coli

Hong‐Ying Hu

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Abstract

The inactivation effect of E.coli with different combination modes of UV and chlorine was compared.The result shows that the combination of UV and chlorine can improve the inactivation effect.However,different combination modes and different doses of UV and chlorine affect the inactivation effect.Simultaneous disinfection with UV and chlorine has lower effect than sequential disinfection.During disinfection with chlorine followed by UV,addition of high-concentration chlorine with short contact time has better disinfection efficiency.During disinfection with UV followed by chlorine,high chlorine dose has high inactivation rate.When the chlorine concentration is the same and the contact time is different,the difference of inactivation effect is not significant.

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What this paper is about

The inactivation effect of E.coli with different combination modes of UV and chlorine was compared.The result shows that the combination of UV and chlorine can improve the inactivation effect.However,different combination modes and different doses of UV and chlorine affect the inactivation effect.Simultaneous disinfection with UV and chlorine has lower effect than sequential disinfection.During disinfection with chlorine followed by UV,addition of high-concentration chlorine with short contact time has better disinfection efficiency.During disinfection with UV followed by chlorine,high chlorine dose has high inactivation rate.When the chlorine concentration is the same and the contact time is different,the difference of inactivation effect is not significant.

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Available abstract

The inactivation effect of E.coli with different combination modes of UV and chlorine was compared.The result shows that the combination of UV and chlorine can improve the inactivation effect.However,different combination modes and different doses of UV and chlorine affect the inactivation effect.Simultaneous disinfection with UV and chlorine has lower effect than sequential disinfection.During disinfection with chlorine followed by UV,addition of high-concentration chlorine with short contact time has better disinfection efficiency.During disinfection with UV followed by chlorine,high chlorine dose has high inactivation rate.When the chlorine concentration is the same and the contact time is different,the difference of inactivation effect is not significant.

Key concepts: Chlorine, Chemistry, Escherichia coli, Significant difference, Inorganic chemistry, Photochemistry, Biochemistry, Organic chemistry

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