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GPS-X Technical Reference

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259 Sedimentation and Flotation Models<br />

The correlation equations are:<br />

Equation 8.3<br />

Equation 8.4<br />

Equation 8.5<br />

where:<br />

v max<br />

rhin<br />

rfloc<br />

SVI<br />

clarify<br />

= maximum Veslind settling velocity(m/d)<br />

= hindered zone settling parameter (m 3 /gTSS)<br />

= flocculant zone settling parameter (m 3 /gTSS)<br />

= sludge volume index (mL/g)<br />

= clarification factor<br />

fcorr1 - fcorr9 = SVI correlation coefficients<br />

To use the correlation, the user must set the parameter use SVI to estimate settling<br />

parameters to ON. The Sludge Volume Index and Clarification parameters can then be<br />

specified and the settling parameters are calculated automatically by <strong>GPS</strong>-X. The<br />

correlation coefficients can be accessed in the<br />

Options > General Data > System > Parameters > Miscellaneous form.<br />

NOTE:<br />

The default values of the correlation factors are for SVI. A correlation<br />

with SSVI has not been performed. The default values of the correlation<br />

coefficients are based on five sewage treatment plants.<br />

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

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