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GPS-X Technical Reference

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Suspended Growth Models 102<br />

Entering KLa Directly – Mechanical Aeration<br />

Mechanical surface aeration is calculated similarly to diffused; however, the fouling and<br />

depth correction factors are not required and oxygen transfer is related to the mechanical<br />

power input.<br />

For mechanical surface aeration, the formula for the DO saturation concentration at field<br />

conditions is modified as follows:<br />

Equation 6.17<br />

as δ = 1 in this case, the pressure correction factor is re-defined as:<br />

Equation 6.18<br />

The K La at field conditions is calculated using Equation 6.19.<br />

Equation 6.19<br />

The OTR is calculated using Equation 6.20 as shown below:<br />

Equation 6.20<br />

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

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