-organisms (suspended solids);
absorbing UV radiation (colour, suspended solids, organic matter, Fe3+, chelated Fe etc.) thus measuring transmittance (whether or not after filtration);
reacting ... Biofor, Filtration, Ultrafor, Ozone, Nitrification, Wastewater, Disinfection, Ultraviolet disinfection, Primary settling, Chlorination, Biofilters, Activated sludge, Denitrification ... Biofor Filtration Ultrafor Ozone Nitrification Wastewater Disinfection Ultraviolet disinfection Primary settling Chlorination Biofilters Activated sludge Denitrification...