How many types of sedimentation tanks are present based on the shape of the tank?

Lamella Clarifier works on which principle?

When will the particles settle in a tank which is subjected to countercurrent settling?

Which is the primary force acting on the Settleable particles?

In countercurrent settling how is the solid suspension fed?

What is type IV settling also called as?

Which of these process is involved in the removal of BOD and phosphorous?

How is the length of the surface of a settling tank determined in case of cross- flow settling?