The aim of water disinfection is to render any pathogens contained therein,
e.g. viruses and bacteria, harmless. This can be achieved either by adding chemicals
(e.g., chlorine or chlorine dioxide) or by treatment with UV-C light. Disinfection processes
form the final stage and are located downstream of water treatment systems. The limit and guideline values
for the microbiological constituents of water are regulated by statutory provisions (e.g. the German Drinking Water Ordinances (TrinkwV)) and
technical rules (e.g. VDI 6022) depending on the requirements and intended application.