What is the primary purpose of filtration in water treatment?

What is the primary purpose of filtration in water treatment?

• A. To remove suspended solids using media such as sand and anthracite
• B. To remove chloramines
• C. To increase contact time
• D. To break down ammonia

Answer: (A)

The primary purpose of filtration is to physically remove suspended solids from water as it passes through a media bed, such as sand and anthracite. As water flows through the filter, particles are trapped in the small spaces between the media grains and on the media surfaces, reducing turbidity and improving clarity. This solid-removal step helps protect downstream processes and makes disinfection more effective. Removal of chloramines is a chemical treatment task, not the main role of filtration. Increasing contact time relates to how long water sits in a treatment stage to allow reactions or disinfection to occur, which is separate from the physical capture of particles. Breaking down ammonia involves chemical or biological processes rather than physical filtration.

The primary purpose of filtration is to physically remove suspended solids from water as it passes through a media bed, such as sand and anthracite. As water flows through the filter, particles are trapped in the small spaces between the media grains and on the media surfaces, reducing turbidity and improving clarity. This solid-removal step helps protect downstream processes and makes disinfection more effective.

Removal of chloramines is a chemical treatment task, not the main role of filtration. Increasing contact time relates to how long water sits in a treatment stage to allow reactions or disinfection to occur, which is separate from the physical capture of particles. Breaking down ammonia involves chemical or biological processes rather than physical filtration.