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GPS-X Technical Reference

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Estimate Oxygen Transfer Rate (OTR) at Field Conditions in g/d<br />

Equation 6.12<br />

Suspended Growth Models 206<br />

Estimate Standard Oxygen Transfer Rate (SOTR) in g/d<br />

Equation 6.13<br />

Airflow at Standard Conditions in m3d<br />

The gas flow is calculated using Equation 6.68<br />

Equation 6.68<br />

where:<br />

molfr o2 = mole fraction of O 2 in feed gas (mole O 2/mole gas)<br />

MW O2 = molecular weight of O 2 (32 g/mole O 2)<br />

P gas = density of feed gas (g/m 3 )<br />

MW gas<br />

= average molecular weight of gas (g/mole gas)<br />

The airflow at standard condition is converted to field conditions using the ideal gas law:<br />

Equation 6.16<br />

where:<br />

T standard<br />

T field<br />

= air temperature at standard conditions<br />

= air temperature at field conditions (°C)<br />

<strong>GPS</strong>-X <strong>Technical</strong> <strong>Reference</strong>

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