Grit and sand particles are removed from waste water by which type of settling?

When alum is added to the waste water containing calcium ions which compound is formed as a precipitate?

Which of these process is involved in the settling of particles in the secondary settling tanks?

Determine the size of a flash mixer for the following data. Round off to the nearest digit. Flow rate: 2200 m3/hr

Type III settling is called as hindered settling.

What is the chemical formula of aluminium sulphate?

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

________ is provided after activated sludge process.