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GPS-X Technical Reference

GPS-X Technical Reference

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299 Others Models<br />

High volume for pump ON<br />

This variable defines the volume in the tank above which the pump operates at maximum<br />

pumping capacity.<br />

Minimum pump capacity<br />

This is the capacity at which the pump operates when the volume in the tank is below the<br />

low volume.<br />

Maximum pump capacity<br />

MEMBRANE FILTER<br />

This is the capacity at which the pump operates when the volume in the tank is above the<br />

high volume.<br />

One model is available for this object (empiric).<br />

In this zero-volume model, the soluble state variables are not affected, but solids are partitioned<br />

into one of two streams based on a user-defined solids separation factor. Flow can be pumped<br />

from either of the effluent connection pipes and the difference between the pumped flow and<br />

influent flow is diverted to the other effluent connection. Solids concentrations in the two effluent<br />

streams are calculated through a mass balance based on flows and the separation factor. An<br />

example calculation is given below:<br />

Influent Flow = 100 m 3 /d<br />

Influent xbh = 1000 g/m 3<br />

Mass Influent xbh = 100 x 100 = 100,000 g/d<br />

Pumped Flow (user-defined) = 10 m 3 /d – concentrate<br />

Filter Efficiency (user-defined) = 0.90<br />

Filtrate Flow = 90 m 3 /d<br />

Filtrate xbh Concentration = 100 g/m 3<br />

Filtrate xbh Mass = 90 x 100 = 9,000 g/d<br />

Concentrate xbh Mass = 100,000 – 9,000 = 91,000 g/d<br />

Concentrate xbh Concentration = 91,000 / 10 = 9,100 g/m 3<br />

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

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