17.01.2015 Views

GPS-X Technical Reference

GPS-X Technical Reference

GPS-X Technical Reference

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Other Models 322<br />

High-Rate Treatment Model Sub-Section<br />

Equation Shape – specifies the settleability model to be used. The user can select the<br />

following options: Constant TSS Removal Efficiency, Exponential Function of Influent<br />

TSS, Switching Function-Based SOR Relationship, Combined Equation<br />

<br />

<br />

Constant TSS Removal Efficiency: Uses the maximum settleable solids<br />

fraction to calculate the effluent TSS based on the influent TSS. For example,<br />

using E = 100E u as the settleability model.<br />

Exponential Function of Influent TSS: Uses an exponential-based expression<br />

to calculate the effluent TSS based on the influent TSS. For example, using the<br />

following equation as the settleability model. This model increases TSS removal<br />

efficiency as the influent TSS increases<br />

<br />

Switching Function-Based SOR Relationship: Uses a switching function,<br />

based on the surface overflow rate (SOR) to calculate effluent TSS. For example,<br />

using the following equation as the settleability model. This model reduces the<br />

removal efficiency at higher SORs.<br />

<br />

Combined Equation: Uses the entire settleability equation to calculate the<br />

effluent TSS, based on the influent TSS and the SOR. For example, using<br />

Equation 11.17 (shown below) as the settleability model.<br />

Maximum Settleable Solids Fraction: Specifies a maximum concentration-based TSS<br />

removal efficiency fraction. This is the highest TSS removal efficiency that can be<br />

achieved. The quantity is dimensionless (-) but can also be entered as a percentage (%).<br />

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

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!