65. 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
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.
