1.State the two main reason why an activated sludge system is operated at a relatively low f/m ration?
2.Define the f/m ratio in the context of biological treatment of wastewater, and relate the f/m ratio to the exponetial growth and declinign growth phases of a bacterial culture. Hoe does the f/m ratio influence the metabolism, the rate of BOD removal, and the settleability of sludge?
3.Suppose you are told that a process must achieve a 2.7 log removal of Giardia cysts. What does that mean in terms of % remaining and % removal?