Discussion :: Environmental Engineering
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Lagoons used for purification of polluted water
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A.
are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds.
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B.
use micro-organisms/bacteria in presence of dissolved oxygen.
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C.
gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre.
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D.
all (a), (b) & (c).
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Answer : Option D
Explanation :
No answer description available for this question.
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