What is the surface wash rate?

While designing a blower for backwash for dual media filters without air scouring what is the velocity considered?

Air is blown in the reverse direction during cleaning of filter beds.

In which type of trickling filter is nitrogen oxidized?

While designing a blower for backwash for sand filters with air scouring what is the velocity considered?

What is the mixed liquor?

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

While designing a blower for backwash for sand filters without air scouring what is the velocity considered?