Which of the following is the first step in drinking water treatment?
- ADisinfection
- BCoagulation and Flocculation
- CSedimentation and Clarification
- DFiltration
Solution & Step-by-step Explanation
The conventional municipal process sequence for drinking water purification is:
Coagulation and Flocculation: Chemicals (like alum) are added to bind dirt and dissolved particles together into larger particles called "floc". This is the first step.
Sedimentation: The heavy floc particles settle down to the bottom.
Filtration: The clear water passes through sand, gravel, and charcoal filters.
Disinfection: Chlorine or UV light is added to kill bacteria and pathogens.
Coagulation and Flocculation: Chemicals (like alum) are added to bind dirt and dissolved particles together into larger particles called "floc". This is the first step.
Sedimentation: The heavy floc particles settle down to the bottom.
Filtration: The clear water passes through sand, gravel, and charcoal filters.
Disinfection: Chlorine or UV light is added to kill bacteria and pathogens.