STANDARDZoology-Environmental Issues
STANDARD Zoology Sewage Treatment MCQ Question
Type: MCQ-conceptual-Medium
The solids, which settle after primary treatment of sewage are called
A
Primary sludge
B
Activated sludge
C
Flocs
D
Total solids
Correct Answer
Option A
Detailed Explanation
Primary treatment involves physical removal of particles by filtration and sedimentation. All solids that settle form the primary sludge and the supernatant forms the effluent.
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