STANDARDBotany-Microbes in Human Welfare
STANDARD Botany Sewage Treatment MCQ Question
Type: MCQ-conceptual-Medium-Class 12
In the sewage treatment, bacterial flocs 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
Correct Answer
Option B
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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