Biological action takes place in a rapid filtration unit.

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

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

Calculate the surface area of the flocculation zone for the following data. Flow: 300 m3/h. Rise rate :1.2 m/h

How many hours does it take for filters to attain turbidity breakthrough?

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

Which type of bacteria are used in trickling filters?

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