Cleaning a gravity media filter by pumping water upward at h

Cleaning a gravity media filter by pumping water upward at high velocity is called?

a)

Terminal head loss

b)

Rapid sand filtration

c)

Filter-to-waste

d)

Backwash

Solution

Backwash: It is the process in which the water is pumped upward at high velocity using nozzles to clean the filter media of sand filter after a particular cycle.