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KMID : 1024520080170060581
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Journal of the Environmental Sciences
2008 Volume.17 No. 6 p.581 ~ p.589
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Effect of Water Quality of Cooling Tower on Legionella pneumophila Disinfection Using Ru/Ti Electrode
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Kim Dong-Seog
Park Young-Seek
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Abstract
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This study was carried out to evaluate the effect of water quality of cooling tower on Legionella pneumophila disinfection using Ru/Ti electrode. The influences of parameters such as pH, turbidity, and TOC were investigated using laboratory scale batch reactor. Oxidants such as free Cl, were measured. The results showed that all of the water quality parameters of cooling tower had deteriorated disinfection of Legionella pneumophila. When the turbidity, and TOC was increased, oxidants which was generated during electrolysis was decreased. pH, free Cl, concentration were decreased with the increase of pH, whereas concentration was increased with the increase of pH. The order of effect of water quality on the disinfection performance for Legionella pneumophila was turbidity > > TOC > pH. To obtain the safety standard (1000 CFU/L), the simultaneous increase current and NaCl dosage was needed.
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KEYWORD
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Water quality, Disinfection, Current, Legionella pneumophila, Oxidants
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