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CT - Chemical

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Centralised treatment is shared by several households or at the village level and has different options of chemical water disinfection available to them than at the household level. The simplest and most common is through use of chlorine, although chlorine leaves a minor toxic residue, so other methods have been developed. One alternative is ozonation, as it leaves no harmful residues, yet is an expensive system to use. Today, combined systems can be found that use filtration, ozone, and smaller amounts of chlorine. De-fluoridation is also covered in chemical disinfection, as fluoride in water affects so much of the population in certain regions and is prevalent in their shared systems.
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|style="background:#efefef;"|[[Image:chlor pipe icon.png|center|link=http://akvo.org/wiki/index.php/Chlorination_in_piped_systems]]|style="background:#efefef;"|[[Image:free chlor icon.png|center|link=http://akvo.org/wiki/index.php/Chemical_disinfection_/_Free_chlorine]]|stylecolspan="background:#efefef;5"|[[Image:safe_water_systems_icon.png|center|link=http://akvo.org/wiki/index.php/WATAsol]]|style="background-color:#efefef;"|[[Image:safe_water_systems_icon.png|center|link=http://akvo.org/wiki/index.php/Chlorine_Dispenser]]
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|style="background:#efefef;"|[[Image:Chlorination_in_piped small.jpg|center|140px100px|link=http://akvo.org/wiki/index.php/Chlorination_in_piped_systemsChlorination in piped systems]]|style="background:#efefef;"|[[Image:Free_chlorine small.jpg|center|140px100px|link=http://akvo.org/wiki/index.php/Chemical_disinfection_Chemical disinfection /_Free_chlorineFree chlorine]]|style="background:#efefef;"|[[Image:800px-Setup_of_WATAsol small.jpg|center|140px100px|link=http://akvo.org/wiki/index.php/WATAsolThe WATA device]]|style="background:#efefef;"|[[Image:Chlorine_dispenser small.jpg|center|140px100px|link=http://akvo.org/wiki/index.php/Chlorine_DispenserChlorine Dispenser]]
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|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Chlorination_in_piped_systems|Chlorination in<br> piped systems]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Chemical_disinfection_/_Free_chlorine|Chemical disinfection <br>/ Free chlorine]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[WATAsolThe WATA device]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Chlorine Dispenser]]</div>
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|stylecolspan="background:#efefef;5"|[[Image:ozone icon.png|center|link=http://akvo.org/wiki/index.php/Ozonation]]|style="background:#efefef;"|[[Image:de-fluor icon.png|center|link=http://akvo.org/wiki/index.php/De-fluoridation]]|style="background:#efefef;"|[[Image:Plation Float - commercial icon.png|center|100px|link=http://akvo.org/wiki/index.php/Plation_float]]|style="backgroundcolor:#efefef;"|
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|style="background:#efefef;"|[[Image:Ozone_generator small.jpg|center|140px100px|link=http://akvo.org/wiki/index.php/Ozonation]]|style="background:#efefef;"|[[Image:Defluoridation_unit small.jpg|center|140px100px|link=http://akvo.org/wiki/index.php/De-fluoridation]]|style="background:#efefef;"|[[Image:plation float small.jpg|center|140px100px|link=http://akvo.org/wiki/index.php/Plation_floatPlation float]]
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