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

While designing an HRSCC what is the Solid loading rate assumed for the Clarification zone?

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

What does sand filter remove?

What is the air scour rate which is provided before a water backwash?

Hindered zone settling refers to the suspensions of intermediate concentration.

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

Which of these is the most efficient?