Micro-organisms metabolize the ___that exists after primary clarification.

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

Calculate the area of the tube settlers for the given data: Flow: 1500 mm3/h Surface loading rate: 7 m2/m3/h

When filled which of the following material both nitrogen and BOD are removed?

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

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

Tube settlers are operated in which mode?

While designing an HRSCC what is the velocity assumed?