Investigation of the survival of bacteria under the influence of supporting electrolytes KCl , CuI and NaBr in the electrochemical method

Drinking water pollution is a serious threat for public water supply. Water disinfection has a very important role in the reduction of pathogenic microorganism. Water electrodisinfection is an efficient and cost-effective method in water disinfection. The aim of this study was the survey of inactivation in two types bacteria (as index and resistant) by electrochemical process in the presence of supporting electrolytes.
Inactivation of E.Coli and Bacillus subtilis spore was studied at current intensity of 500mA, while each of supporting electrolytes was present alone. The type of electrodes were steel and the distance between electrodes was 2cm. Furthermore, the tests carried out in monopolar mode Fe-Fe, neutral pH and experimental temperature (21o c). The number of bacteria, amount of supporting electrolyte, voltage, and electrochemical action time were investigated.
Adding the supporting electrolytes to the electrochemical disinfection, decreased bacterial resistance. Copper iodide (CuI) on 2 mg/L conc. showed more effective in bacterial inactivation.
Supporting electrolyte CuI founded decrease on ionic transmission rate and promotion voltage current, decreases electrochemical inactivation time and increases bactericidal effect