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Question #82490

Chemical Engineering

Lagoons used for purification of polluted water_______________?

Options:

A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or

B) oxidation ponds

C) Use micro-organisms/bacteria in presence of dissolved oxygen

D) Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended

E) solid < 1 mg/litre and BOD = 3.8 mg/litre

F) All A., B. & C.

Answer: Lagoons used for purification of polluted water All A., B. & C..

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