STANDARD Botany Sewage Treatment MCQ Question
In the sewage treatment, bacterial flocs are allowed to sediment in a settling tank. This sediment is called as
Inactivated sludge
Activated sludge
Primary sludge
Secondary sludge
Correct Answer
Detailed Explanation
Once the BOD of sewage or wastewater is reduced significantly, the effluent is then passed into a settling tank where the bacterial flocs are allowed to sediment. This sediment is caused by activated sludge.
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