Electrochemical has the suitable method of drinking water disinfection. This method leads to
production of hydroxyl radicals which are known powerfull oxidant agent. In recent years, water disinfection
using electrophotocatalytic method is spreading. The aim of this experimental applied study is to evaluate the
removal of
Escherichia Coli
, as the microbial contamination indicator of water, from drinking water using
electrophotocatalytic method. The contaminated water in an electrophotocatalytic reactor were prepared by
adding 10
2-10
3 cell of
E. coli bacteria to drinking water. The studied variables were pH (6-8), the number of
bacterial suspensions (10
2-10
3 cells / ml), the UV-A lamps (2-4 W), times (5-40 min), the distances between
electrodes (2-3.5 cm), layering of zinc oxide nanoparticles (1-3), and voltages (10-40). The findings showed the
correlation between removal of cells and UV-A lamps, voltage, and time of electrolysis. Optimal removal
(MPN: 0) was obtained at pH 8, time of electrolysis: 5 minutes, 2 layer of nano ZnO, and voltage of 10 V. This
result offers that this method is an efficient method for water disinfection.
