GPS-X Technical Reference

Influent Models 72
Figure 5-9 - CODstates Influent Model Inputs
This model has been designed to mimic the input of a sludge stream. The user inputs the
total suspended solids, a few state variables, and a couple of stoichiometric fractions.
From these inputs, the organic solids are partitioned into heterotrophic biomass (i.e.
degradable particulate material), polyphosphate accumulating biomass (CNPLIB only)
and un-biodegradable particulate material. The remaining particulate organic state
variables are set to zero. All the soluble state variables are defaulted to zero in this model,
except for dissolved oxygen and alkalinity.
This model is appropriate if a full influent characterization has been performed and the
influent state variables have been calculated manually. If the user selects the states
model, input values for the state variables, and a few stoichiometric fractions used for
calculating the composite variables are required. The CNlib states data entry form
(Composition > Influent Composition) is shown in Figure 5-9, and the stoichiometry
entry form (Composition > Influent Stoichiometry) is shown in Figure 5-10.
GPS-X Technical Reference