Which treatment process is most important for destroying disease-causing organisms?

Which treatment process is most important for destroying disease-causing organisms?

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

Answer: (B)

Disinfection is the step that inactivates or destroys disease-causing microorganisms. After the water has gone through coagulation, flocculation, sedimentation, and filtration to remove solids and many microbes, disinfection ensures that any remaining pathogens are killed or inactivated before the water is distributed. Methods like chlorine, chloramines, ozone, or UV are designed to destroy organisms and provide a residual that continues to protect water in the system. Filtration, coagulation, and sedimentation remove particles and reduce turbidity, which helps disinfection work better, but they do not reliably destroy all pathogens on their own. That’s why disinfection is the essential process for ensuring microbial safety.

Disinfection is the step that inactivates or destroys disease-causing microorganisms. After the water has gone through coagulation, flocculation, sedimentation, and filtration to remove solids and many microbes, disinfection ensures that any remaining pathogens are killed or inactivated before the water is distributed. Methods like chlorine, chloramines, ozone, or UV are designed to destroy organisms and provide a residual that continues to protect water in the system. Filtration, coagulation, and sedimentation remove particles and reduce turbidity, which helps disinfection work better, but they do not reliably destroy all pathogens on their own. That’s why disinfection is the essential process for ensuring microbial safety.