As the compression increases, the porosity in filter bed _____

Even by high-rate of backwash, efficiency of cleaning is poor.

Orifice placement is critical to the successful operation of the clarifier.

What is the specified minimum time for backwash of rapid filters?

What is the surface wash rate?

What is the bulk density of sand assumed while designing the amount required for a sand filter?

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

The settling tank which is followed after the Trickling filter has which of the following characteristic?