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The Electrochemical Removal of Bacteria From Drinking Water Publisher



Gholami S1 ; Naderi M1 ; Yousefi M1 ; Arjmand MM1
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

Source: Desalination and Water Treatment Published:2019


Abstract

Effective disinfection is a particular stage of drinking-water treatment and is an important process for the removal of pathogenic microorganisms from the water. Germs resistant to common disinfectants are a major challenge in drinking water treatment across the world. The present study was conducted to compare the electrochemical removal of Escherichia coli and spores of Bacillus subtilis as indicative and resistant bacteria in drinking water, respectively. A reactor designed with a capacity of 200 cc and containing steel electrodes was selected for the reactions. The number of bacteria (CFU/ mL), the electrochemical reaction time (min), the voltage (v), the electric current intensity (mA), ambient temperature of 25°C and natural pH of drinking water (7.4) were fixed as the operating parameters of the study. Based on the findings of this study, after applied voltage, reaction time is the most effective factor in increasing microbial removal efficiency. The optimal reaction time for the removal of Bacillus subtilis spores, Bacillus subtilis and E. coli was 5, 90 and 120 min, respectively. By establishing a potential difference of 4.5 and 8 V in the reactor, the number of Bacillus subtilis spores after the expiry of 2 h was 2 CFU/mL and 0 CFU/mL, respectively. © 2019 Desalination Publications. All rights reserved.
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