Question

Assertion (A): Flocs are masses of bacteria associated with fungal filaments in secondary treatment of sewage.

Reason (R): Flocs help in digestion of solid waste by anaerobic respiration.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation for Assertion (A).

• Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation for Assertion (A).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Assertion (A) is true, but Reason (R) is false.

Explanation:

Flocs are aggregates of microorganisms, primarily bacteria, held together with filamentous organisms and extracellular polymers that form during secondary treatment. The aeration tank aerobically breaks down organic matter (with oxygen supplied); anaerobic digestion of sludge occurs later in separate anaerobic digesters, not in the aerobic secondary treatment.