While designing a trickling filter what would be the depth assumed?

For rock type high filtration rate trickling filters what would be the organic loading rate assumed?

Which of the following is not used as a media for trickling filters?

Which of the following is not true in case of closing the top of the vessel?

What is the maximum reduced concentration of BOD obtained at the outlet of tricking filter?

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

Which of these is the most efficient?

What is the depth of washing during high-rate water backwash?