GPS-X Technical Reference

205 Suspended Growth Models
Estimate Airflow rate at Field Conditions
The airflow at standard condition is converted to field conditions using the ideal gas law:
Equation 6.16
where:
T standard
T field
= air temperature at standard conditions
= air temperature at field conditions (°C)
DO Control
Estimate K La at field condition
The K La at field conditions is calculated by the controller
Estimate K La at standard condition
Equation 6.70
where:
K La T = mass transfer coefficient at temperature T in °C (1/day)
K La 20 = mass transfer coefficient at 20°C
(T-20) = temperature correction factor (default value in GPS-X is 1.024)
aF = wastewater correction factor for K La 20
F = fouling factor (default value in GPS-X is 1.0)
T
= wastewater temperature
GPS-X Technical Reference