Article | July 29, 2022

What's In The Black-Box? – Bio-P In TDG

The Transcend Design Generator (TDG) now has the capability to design facilities with biological phosphorus removal!

We’d like to highlight some details about the background calculations – this is going to be the first post of our “What’s in the black-box?” series.

This new feature in TDG covers mainstream biological phosphorus removal. The design process can be separated into two steps:

  • The first is an initial calculation using spreadsheet-based methods available in public literature to define proper reactor volumes, recirculation ratios, and so on.
  • The second step is verification with process simulation. If simulation results indicate that with the initially calculated volumes of ratios and recycle flows that the system cannot meet the effluent criteria, process parameters are adjusted and the simulation runs again, up until the effluent concentrations are below the target values.

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