Question

During biological treatment of sewage, the masses of bacteria held together by fungal filaments to form mesh-like structures are called:

• A. Primary sludge
• B. Flocs
• C. Activated sludge
• D. Anaerobic sludge

Hint:

Flocs are an essential component of the biological treatment process in sewage treatment plants, enabling the efficient removal of organic pollutants.

Answer 1

The Correct Option is B

During secondary sewage treatment, flocs, which are aggregates of bacteria and fungi, form. These flocs are instrumental in decomposing organic material in wastewater, thereby substantially lowering the Biochemical Oxygen Demand (BOD).