Disinfection of potable water sources on animal farms and their microbiological safety

2016 
The aim of this study was to examine drinking water on three farms in eastern Slovakia and to determine experimentally the optimum dose for adequate disinfection in terms of devitalisation of potential pathogens while observing the limit for residual active chlorine (0.3 mg/l) in drinking water. Our investigations included bacteriological examination focused on general contamination and indicator bacteria (bacteria culti- vated at 22 and 37 °C, total coliforms, E. coli, enterococci), physico-chemical examination (pH, ammonium ions, nitrites, nitrates, chlorides, free chlorine, chemical oxygen demand COD Mn and Ca + Mg), and EEM (excitation emission matrix) fluorescence spectroscopy which focused on the presence of natural organic matter (NOM). After determining the optimum single dose of Chloramine T for disinfection of water used for watering of animals, the bacteriological quality of water was checked on the 5 th day after the disinfection. The results showed that water
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