GPS-X Technical Reference

75 Influent Models
Figure 5-13 - CN Library Acetate Influent Model - Acetate Dose Form
The methanol influent model can be used to simulate the addition of methanol to the
treatment process. The methanol dose can be entered as a percentage of purity, or in a
variety of other units (mol methanol/L, g(methanol*COD)/m 3 , g(methanol)/L, etc.), by
selecting from the units drop-down menu (Figure 5-14). The COD equivalent of the
methanol dose is automatically converted to sf if asm2d has been chosen for the local
biological model or ss (readily biodegradable substrate) for all other local biological
models.
Figure 5-14 - CN Library Methanol Influent Model Inputs
This influent model was developed to simulate a rain event or alkalinity addition whereby
the influent hydraulic load could be increased without increasing the organic or nitrogen
load to the plant. In the water influent, the only variable to be provided in the
composition menu is the alkalinity. All other state variables are set to zero.
BATCH INFLUENT OBJECT
The difference between the batch influent (truck) object and the continuous influent objects
(arrows) concerns the flow and load types. The available flow and load types for the batch
influent object are average and individual.
In the batch influent, if the average flow and load types are selected, the model will behave
exactly like the continuous influent.
GPS-X Technical Reference