pH Control in the ASM1temp

Hi Enrico,
I'm modelling an aerobic digestion tank according to a system of alternating cycles with the ASM1temp. I'd like to know if there is a way to check the ph trend during the simulation, because I didn't find it.
If there isn't a direct way to chek it, I saw that there's the variable C(S_ALK). Does exist a correlation between the pH? If yes, what kind?

Thank you for your attention. Kind regards.

Andrea

Hello Andrea,
no, there's no pH as state variable in AMS1, or any of the ASM models (only in ADM1).
You may be able to have a (qualitative?) indication of pH, via S_ALK but I don't know of any reliable correlation between the two variables - certainly not implemented in WEST.