Good afternoon
I have an activated sludge system with surface aerators, where the aerators' input power is indicated to maintain the levels (concentration) of actual OD in the ASU tank.
I make the correct adjustment of the aerators' input power, to obtain OD levels in the ASU tank.
However I noticed that OD levels change during the parameter calibration experience, and also when I change the incoming fractionation of the effluent.
Question: Is there any way to enter the OD levels in the ASU tank with a fixed value?