Calibration and validation of ASM1 model

Hello,
I'm working with ASM1 to model a WWTP with a plug-flow biological reactor. Is there any reference for calibration and validation of ASM1 models, in particular:
- Monitoring data required;
- More important parameters to be calibrated.
Thank you

I would recommend the technical report from IWA on good modelling practices.

Rieger, L., S. Gillot, G. Langergraber, and A. Shaw, 2012, Good Modelling Practice: Guidelines for Use of Activated Sludge Models, Iwa Publishing.