Question

'Flocks' is

• A. The primary sludge produced in sewage treatment
• B. A type of biofortified food
• C. A mesh-like structure formed by the association of bacteria and fungal filaments in sewage treatment
• D. The effluent in primary treatment tank obtained during sewage treatment

Answer 1

The correct option is C

A mesh-like structure formed by the association of bacteria and fungal filaments in sewage treatment

Flocks is the mesh-like structure formed by the association of bacterial and fungal filament in sewage treatment. These microbes while growing consume the major part of the organic matter converting the organic matter into microbial biomass and releasing a lot of chemicals, thus, reducing the Biochemical Oxygen Demand (BOD). In this way, flocks help in the treatment of sewage or municipal wastewater generated by cities and towns.