GPS-X Technical Reference

87 Influent Models
Chemical Dosage Object
The COD chemical dosage object uses the codfeed model (Figure 5-25). The COD
chemical dosage object allows user to select the type of COD used in the feed. Three
COD sources acetic acid, propionic acid and methanol are available for selection from the
Composition > Feed Chemical Details menu (Figure 5-26). The Feed Chemical
Details menu is as shown in Figure 5-27. For the selected chemical, two input
parameters of % purity and density of chemical solution at the selected %-purity are
required. Depending on the chemical selection, the concentration of the corresponding
state variable is set. For example, if acetic acid is selected, the concentration of acetate
(sac) is set to the value determined by the set % purity and density of the chemical
solution.
Figure 5-25 - Models in COD Chemical Dosage Influent Object
Figure 5-26 - Accessing Feed Chemical Details Menu
GPS-X Technical Reference