Correct Answer:
Option D - Ozonation is a process of disinfecting the water for satisfactory removal of microorganism by Ozone it is required to have 10 minute contact period of raw water with ozone dose of 2-3 ppm.
• Residual amount of ozone in water should be 0.1 ppm
D. Ozonation is a process of disinfecting the water for satisfactory removal of microorganism by Ozone it is required to have 10 minute contact period of raw water with ozone dose of 2-3 ppm.
• Residual amount of ozone in water should be 0.1 ppm