David Medina

Thanks.

Good morning:

Working with an ASU (activated sludge unit) in parameters/manipulated variables, you can follow an OTR Energy (Oxygen tansfer rate per energy unit) in g/KWh units. I assume that this variable means the SAE (standard aeration efficiency) of the aerator type. Am I right?

At the same time, the default value is 1.800 g/kWh. This value is SAE typical for jets or turbines. If I use a fine pore (fine bubble), should I work with higher values, for instance, 4.2-4.8 kg/kWh? Will I find some changes in the simulation associated to the aeration process?

On the other hand, once the simulation is running, I find in variables/measurement data, a value of OUR measurement data (OUR_ASU) in g/(m3d). I assume this value means AOR (actual oxygenation rate or requirements). So, in order to calculate SOTR, I would use an excel template to correct the obtained value (OUR_ASU) to SOTR by alpha, beta factors, etc. Is that correct?

Thanks in advance.

Good evening,

I would like to know the meaning of the following manipulated variables of the TIMER and how these variables are related to the PI controller in the aeration of  activated sludge unit.

u11
u12
T1
T2

Thanks,