Question

Consider the following statements:
P. Higher the $\frac{F}{m}$ ratio, greater will be the removal of BOD.
Q. Increase in sludge wasting rate causes damage in nitrification.
R. Higher waste temperature promotes the growth of filamentous bacteria.

For the above statements, correct options is:

• A. P - True, Q - False, R - False
• B. P - False, Q - True, R - True
• C. P - False, Q - True, R - False
• D. P - True, Q - True, R - False

Answer 1

The correct option is B P - False, Q - True, R - True

• Higher $\frac{F}{m}$ ratio results in lower BOD removal
• Increase in sludge wasting rate reduces sludge age which reduces nitrification.
• Filamentous bacteria growth is promoted by higher sludge age, lower $\frac{F}{m}$ ratio and higher temperature