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Water Treatment Process - ANSWER-1. Coagulation / Flocculation. During coagulation,
liquid aluminium sulfate (alum) and/or polymer is
added to untreated (raw) water. ...
2. Sedimentation. ...
3. Filtration. ...
4. Disinfection. ...
5. Fluoridation.
Coagulation / Flocculation - ANSWER-Chemical water treatment technique typically applied prior
to sedimentation and filtration (e.g. rapid sand filtration ) to enhance the ability of a treatment
process to remove particles.
Sedimentation - ANSWER-Physical water treatment process using gravity to remove suspended
solids from water. Solid particles entrained by the turbulence of moving water may be removed
naturally by sedimentation in the still water of lakes and oceans.
Filtration - ANSWER-Process of removing undesirable chemicals, biological contaminants,
suspended solids and gases from water. The goal is to produce water fit for a specific purpose.
Disinfection - ANSWER-Removal, deactivation or killing of pathogenic microorganisms.
Microorganisms are destroyed or deactivated, resulting in termination of growth and
reproduction. When microorganisms are not removed from drinking water, drinking water usage
will cause people to fall ill.
Fluoridation - ANSWER-Water fluoridation is the controlled addition of fluoride to a public water
supply to reduce tooth decay. Fluoridated water contains fluoride at a level that is effective for
preventing cavities; this can occur naturally or by adding fluoride.