What is Water treatment?
[[File:Nasiriyah Water Treatment Plant.jpg|thumb|Water treatment plant in [[ Tristannnn]]]] '''Water treatment''' is treating water to make it suitable to be used. Providing [[drinking water]] is one of the main uses of water treatment. Many [[factory|factories]] also need very clean water to make [[steam]] or to make high quality products. Some of this water has to be made very pure with almost no other [[chemical]]s dissolved in it. [[Sewage treatment|Treating sewage]] so that it does not cause harm to the [[environment]] is another kind of water treatment. Saline water can be treated by [[desalination]] to yield fresh water. Two main processes are used, reverse osmosis or '''distillation'''. Both methods require more energy than water treatment of local surface waters, and are rarely used where good fresh water is available. == Methods == * Filtration - The clear '''water''' on top passes through filters composed of sand, gravel and charcoal to remove dissolved particles such as dust, parasites, bacteria, viruses and chemicals. * Disinfection - Chlorine or chloramine is added to kill parasites, bacteria, viruses and germs. * Coagulation / Flocculation. Coagulation is adding liquid aluminum sulfate or alum and/or polymer to raw or untreated '''water'''. * Sedimentation. When '''water''' and flocs undergo the '''treatment''' process, they go into sedimentation basins. *# Filtration. *# Disinfection. *# Sludge Drying. *# Fluoridation. *# pH Correction. ==References== <references /> {{sci-stub}} [[Category:Water infrastructure]]