For roughing type trickling filters what would be the BOD removal rate?

For rock type low filtration rate trickling filters what would be depth assumed while designing it?

For rock type low filtration rate trickling filters what would be the recycling ratio assumed?

For a high rate filter calculate the diameter of the filter required for a flow of water of 200 m3/h.

While designing an HRSCC what is the velocity assumed?

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

Radial tube header is designed to remove ___

Which of these has been used as a medium for high rate filtration?