Fill in the Blanks Water purOnline version water purif by kenneth thomas 1 Sand Sedimentation Chlorination Filtration filtration Flocculation Aeration digestion Fluoridation Water Purification Process : screens for large materials 2 . : chemical coagulation and addition of precipitates such as aluminum 3 . : removes suspended solids 4 . Sludge : addition of anaerobic bacteria 5 . : removes anaerobic bacteria 6 . : Adds oxygen to water to improve color and taste or kills remaining anaerobic bacteria as well 7 . : kills all bacteria 8 . Possible : prevents tooth deca y