Abstract:
Deionized (DI) water contaminated with Salmonella Typhimurium (S. Typhimurium) bacteria
was disinfected by alternating current. Ammonium sulfate was used as electrolyte. Disinfection was carried
out in the circulation system including an electrochemical cell with stainless steel electrodes. The process
efficiency was estimated and the number of killed bacteria was directly proportional to the water treatment
time and concentration of hydroxyl radicals generated by electrolysis. The presence of OH radicals was
detected with N,N dimethyl p nitrosoaniline (RNO) used as a spin trap. Similar experiments were carried
out with water remaining after poultry washing at poultry farms and additionally contaminated with S. Typh
imurium bacteria. Measures were recommended to increase the process efficiency and decrease the water
treatment time.
