Q765
The function of sedimentation tank in sewage treatment is to:
A.
Disinfect the sewage
B.
Remove water content
C.
Aerate the sewage
D.
Remove suspended solids
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
A sedimentation tank allows suspended particles to settle out of water or wastewater as it flows slowly through the tank, thereby providing some degree of purification. A layer of accumulated solids, called sludge, forms at the bottom of the tank and is periodically removed.