While designing a sand filter what is the velocity that is assumed?

The liquid tends to move up through the interstices of contacting particles because of ___

What is the maximum head loss at which the filter should be cleaned?

What does EDI stand for?

While designing a dual media filter what is the velocity that is assumed?

What is the shape of a typical trickling filter?

What is the surface wash rate?

In which type of trickling filter very low power is consumed?