Which of the following is not used as a media for trickling filters?

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

What is the depth of the trickling filter?

Calculate the diameter of the draft tube for the following data. Flow: 1100 m3/h. Height of the draft tube: 1.5 m

While designing a high rate filter what would be the velocity assumed?

While designing an HRSCC what is the detention time assumed for the detention hood?

What is necessary prior to trickling filters?

When filled which of the following material only nitrogen is removed?