Question

describe what happens when water is allowed to pass into sedimentation tank in water works

Answer 1

water is pumped 2 a large tank . here, it is mixed with a small quantity of alum and allowed to stand 4 some time . the suspended particles of clay etc. settle down slowly at the bottom of the tank . the upper layer of water is then sent for filtration.

Answer 2

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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.