Dynamic simulation is often considered a black box - we often meet people who say "I don't like dynamic simulation because I don't understand it." This is a shame, because dynamic simulation is a powerful tool for understanding the behavior of your wastewater treatment process.
To address this aversion, we have made Theo as transparent as possible. You are not flooded with source code, though. That is for the developers. Instead, you are presented with an easy-to-follow method to understand how calculations are performed.
In the following video you can get the idea of how to learn more about your plant's numbers: