Problem: The operator calculates the F/M ratio for his treatment plant, and he finds the F/M = 0.02 Ibs CBOD/day/lb MLVSS. What could be assumed from this result? • There is a low amount of food for each Ib of MLVSS • The F/M is in the proper range for a contact-stabilization activated sludge process • There is an abundance of CBOD for each Ib of MLVSS • The F/M is too high and the WAS rate should be increased