What is the rate of backwash water?

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

What does EDI stand for?

What does SSCC stand for?

The spindle is provided at the __ to support perforated plates.

________ is shifted to keep an ample space for filtering media to rotate.

What is the angle at which a tube settler is usually inclined at?

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