What is the thickened concentration of the thickened sludge from the rotating biological contractor?

Energy may be recovered from sludge as ____

How many products are obtained after dewatering?

What is the rate limiting step in anaerobic digestion?

For what range of COD level anaerobic digestion is carried out?

What is the thickened concentration of the trickling filter sludge?

_________ uses anaerobic digestion.

What is the percentage of thickness that can be achieved for primary sludge?