WATER PURIFICATION Indrotuction Sources of water Treatment Goals Pretreatment pH adjustment Coagulation and flocculation Sedimentation Sludge storage and removal Floc blanket clarifiers Dissolved air flotation Filtration Rapid sand filters Slow sand filters Bank filtration Membrane filtration Removal of ions and other dissolved substances Disinfection Chlorine disinfection Chlorine dioxide disinfection Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water . The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption ( drinking water ), but water purification may also be carried out for a variety of other purposes, including medical, pharmacological, chemical, and industrial applications. The history of water purification includes a wide...