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18/12/2021 1:34 pm
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In sewage treatment, bacterial floes are allowed to sediment in a settling tank. This sediment is called as
(a) inactivated sludge
(b) activated sludge
(c) primary sludge
(d) secondary sludge
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18/12/2021 1:35 pm
Correct answer: (b) activated sludge