The liquid tends to move up through the interstices of contacting particles because of ___

As the compression increases, the porosity in filter bed _____

__________ in trickling filter contains many species like bacteria and round worms.

For rock type low filtration rate trickling filters what would be the recycling ratio assumed?

For roughing type trickling filters what would be the BOD removal rate?

What is the bulk density of pebbles assumed while designing a Pressure sand filter?

What is the rate of backwash water?

What would happen if the tube settler is inclined greater than 60 degrees?