Question
How can I use the new Mass Balance tool in WEST?
Answer
With Release 2025 Update 1 a new tool has been added to WEST to automatically generate a mass balance output file (.csv). The output file contains the mass flow (g/d) of all state components plus a preset of conventional aggregated components (i.e., COD, BOD, TSS, TN and TP) for each terminal of the WEST process layout.
Use case
Hit the Simulation Mass Balance button in the Project/Miscellaneous menu - see Fig. 1, to generate the .csv output. A Save As dialog will open up that allows for choosing the destination folder. The data file can then be open in Excel for further examination and manipulation - see Fig. 2. The file will contain the 'main' state components, for the main 'zModWWTP' Category, as well as 'secondary' state components, for other Categories (e.g., ADM1) used in the WEST project.
Fig. 1 - Simulation Mass Balance model in editor
Fig. 2 - Example of Mass budget output imported into Excel
FURTHER INFORMATION & USEFUL LINKS
[Manuals and User Guides]
WEST - Getting started Tutorial