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- W2344207037 abstract "Disinfection of hot water systems is critical in reducing the incidence of disease outbreaks caused by pathogenic bacteria. Electrochemical disinfection (ED) has been identified as an economical, low-maintenance, and chemical-free alternative in the fight against waterborne pathogenic microorganisms. It also provides the residual disinfection needed to inactivate the planktonic bacteria released by the biofilm. The work presented here includes fundamental small-scale laboratory optimization experiments in a flask where platinum-coated electrodes were immersed in 3.5 L of tap water contaminated with Escherichia coli (NCT10418) with an initial population density between 3×105 and 1.6×105 colony forming units/mL (CFU/mL) or Legionella pneumophila serogroup 1 (NCTC12821) ranging from 180 to 244 CFU/mL. Voltage, electrode area, interelectrode distance, spiking time, volume of contaminated water, and mixer speed were varied to determine the optimal geometrical and operational requirements needed to kill bacteria. Experimental results indicate ED to be an effective control method, with a >4-log inactivation of E. coli and a >5-log inactivation of Legionella in 10 and 45 min, respectively, at a current density of ≈4 mA/cm2. The findings of the flask experiments were translated into real-world conditions by evaluating the long-term performance of an optimized ED prototype device installed in the hot water recirculation system of a small-size healthcare center building. The results showed that ED is effective at minimizing pathogen contamination of the hot water distribution system from initial values, with total bacteria levels and Pseudomonas species being reduced in all of the samples over a 15-month period following activation of the ED device." @default.
- W2344207037 created "2016-06-24" @default.
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- W2344207037 date "2016-12-01" @default.
- W2344207037 modified "2023-09-27" @default.
- W2344207037 title "Inactivation of <i>E. coli</i> , <i>Legionella</i> , and <i>Pseudomonas</i> in Tap Water Using Electrochemical Disinfection" @default.
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- W2344207037 doi "https://doi.org/10.1061/(asce)ee.1943-7870.0001134" @default.
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