Question

differentiate between sedimentation tank and aeration tank

Answer 1

Sedimentation is a physical water treatment process using gravity to remove suspended solids from water.[1] Solid particles entrained by the turbulence of moving water may be removed naturally by sedimentation in the still water of lakes and oceans. Settling basins are ponds constructed for the purpose of removing entrained solids by sedimentation.[2] Clarifiers are tanks built with mechanical means for continuous removal of solids being deposited by sedimentation.[3] Aeration tank where air (or oxygen) is injected in the mixed liquor. Settling tank (usually referred to as "final clarifier" or "secondary settling tank") to allow the biological flocs (the sludge blanket) to settle, thus separating the biological sludge from the clear treated water.