Which of the following is NOT a main stage of the water treatment process?

Which of the following is NOT a main stage of the water treatment process?

• A. Coagulation
• B. Filtration
• C. Evaporation
• D. Sedimentation

Answer: (C)

Evaporation is not considered a main stage of the water treatment process. In the context of water treatment, the primary stages typically involve coagulation, sedimentation, and filtration, all of which work together to remove impurities and make water safe for consumption. Coagulation involves adding chemicals to water to help particles clump together, making them easier to remove. During sedimentation, these larger particles settle to the bottom of a treatment tank. Filtration then removes the remaining particles and microorganisms as water passes through filters of varying materials. Evaporation, while a physical process involving the phase change of water from liquid to vapor, does not play a direct role in the conventional treatment of drinking water. Thus, it is the stage that stands apart from the established initial processes of water purification.

Evaporation is not considered a main stage of the water treatment process. In the context of water treatment, the primary stages typically involve coagulation, sedimentation, and filtration, all of which work together to remove impurities and make water safe for consumption.

Coagulation involves adding chemicals to water to help particles clump together, making them easier to remove. During sedimentation, these larger particles settle to the bottom of a treatment tank. Filtration then removes the remaining particles and microorganisms as water passes through filters of varying materials.

Evaporation, while a physical process involving the phase change of water from liquid to vapor, does not play a direct role in the conventional treatment of drinking water. Thus, it is the stage that stands apart from the established initial processes of water purification.