Why is degassing necessary after ozone treatment?

• A. To Increase Disinfection Strength
• B. To Remove Dissolved Ozone Before Discharge
• C. To Enhance Taste
• D. To Reduce Ozone Generation

Answer: (B)

After ozone treatment, some ozone remains dissolved in the water. Degassing is needed to remove that residual ozone before discharge. This prevents ozone from off-gassing into the atmosphere, protects aquatic life and downstream equipment from oxidative effects, and helps meet regulatory discharge limits and safety requirements. Degassing does not increase disinfection strength or reduce ozone generation; it simply eliminates the ozone that’s still present after treatment. It can also improve taste, but that is a secondary benefit.