GPS-X Technical Reference

275 Digestion Models
Figure 10-1 - Schematic Diagram of the Anaerobic Digestion Model
A schematic diagram of the anaerobic digestion process is shown in Figure 10-1, where:
In the gas phase:
qtg:
qco2
qch4:
gco2:
gch4
= total gas flow (m 3 /d)
= CO 2 gas flow (m 3 /d)
= CH 4 gas flow (m 3 /d)
= partial pressure of CO 2 (atm)
= partial pressure of CH 4 (atm)
In the liquid phase:
State Variables
xmh: = methanogens (gCOD/m 3 )
vss = volatile suspended solids (gCOD/m 3 )
slf = total volatile fatty acids (gCOD/m 3 )
sco2t = total soluble CO 2 (moles/L)
sz = net cations (moles/L)
stox = toxic substance (g/m 3 )
GPS-X Technical Reference