UPPSC Civil Eng. A.E. 2013 (II)
⭕ A. Removal of turbidity
⭕ B. Removal of hardness
⭕ C. Killing of pathogenic bacteria
⭕ D. Removal of odour
📚 Explanation:
The main purpose of water disinfection is to remove harmful microorganisms.
🔹 Disinfection kills pathogenic bacteria.
🔹 It does **not remove turbidity, hardness, or odour**, which are addressed by other treatment processes like filtration, softening, or aeration.
Key Point: Disinfection ensures water is microbiologically safe for human consumption.
The main purpose of water disinfection is to remove harmful microorganisms.
🔹 Disinfection kills pathogenic bacteria.
🔹 It does **not remove turbidity, hardness, or odour**, which are addressed by other treatment processes like filtration, softening, or aeration.
Key Point: Disinfection ensures water is microbiologically safe for human consumption.
👉 Therefore, the correct answer is: C. Killing of pathogenic bacteria
Key Points on Water Disinfection:
- Purpose: To kill pathogenic microorganisms.
- Not for turbidity or hardness: These are handled in separate treatment stages.
- Common disinfectants: Chlorine, ozone, UV light.
