Water loss in an UASB reactor ?

Hola a todos !

I have this doubt about how to calculate the water loss ( perte de charge in French or pérdida de carga in Spanish) in a UASB reactor (Upflow anaerobic sludge blanket).

It has 5,30 m of hight

HTR = 14,08 h

velocity of flow = 0,40 m/h

If anybody needs more information, do not hesitate in contact me.

Thank you in advance !

Have a good day !