Lamella clarifiers are used as pre-treatment ahead of _____

Which of the following is not a coagulant?

What is the size of the oil droplets?

What is the angle of inclination for lamella plates?

Which of these pollutants is removed by Dissolved air floatation?

The longer the water is held in the tank, the better the treatment.

During the disposal of the sludge, it must be __

DAF separates ___ in water.