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GPS-X Technical Reference

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323 Others Models<br />

Exponential constant for TSS dependence: This parameter controls the exponential<br />

shape of the removal efficiency vs. influent TSS relationship. Increasing this parameter<br />

will decrease the TSS-based removal efficiency. The default SI units are mg/L.<br />

Surface overflow rate at half the maximum TSS removal efficiency: This parameter is<br />

the half-saturation coefficient in the removal efficiency vs. SOR switching functionbased<br />

relationship. Increasing this parameter will increase the TSS removal efficiency.<br />

The default SI units are in m/d.<br />

Operational Parameters Sub-Section<br />

Underflow Setup: This drop-down menu allows the user to select how the underflow<br />

rate and concentration are calculated. (Underflow Rate, Underflow Concentration)<br />

<br />

<br />

Underflow Rate: The underflow rate is specified and <strong>GPS</strong>-X calculates the<br />

underflow concentration using a mass balance.<br />

Underflow Concentration: The underflow TSS concentration is specified and<br />

<strong>GPS</strong>-X calculates the underflow using a mass balance.<br />

Underflow Rate: This is the underflow rate used when the Underflow Rate option is<br />

selected. The default SI units are m 3 /d.<br />

Underflow Concentration: This is the underflow TSS concentration used when the<br />

Underflow Concentration option is selected. The default SI units are mg/L.<br />

Summary of the High-Rate Treatment Model Output Forms<br />

The Outputs menu is accessed by right-clicking on the dewatering object and selecting<br />

Output Variables. Figure 11-16 shows the Output Variables menu options.<br />

Figure 11-16 - Output Variables Menu in High-Rate Treatment Model<br />

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

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