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GPS-X Technical Reference

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157 Suspended Growth Models<br />

Special Activated Sludge Units<br />

DEEP SHAFT REACTOR<br />

The model associated with the deep shaft object is an adaptation of the mantis suspended-growth<br />

model. It takes into account the specific hydraulics and hydrostatic pressure found in a deep shaft<br />

reactor.<br />

The deep shaft header tank is modelled with two complete-mix reactors (by default), and is under<br />

atmospheric pressure. The downcomer and the riser shafts are modelled with twenty completemix<br />

reactors (by default).<br />

MEMBRANE BIOREACTOR (MBR)<br />

The two membrane bioreactor objects in <strong>GPS</strong>-X (plug-flow and completely-mixed) are a<br />

combination of a suspended-growth activated sludge model, and a simple suspended solids<br />

separation filter. They are available in all libraries, and with all biological models. The two MBR<br />

objects are shown in Figure 6-11, with the connection points illustrated.<br />

Input<br />

Overflow<br />

Filter<br />

Pump<br />

Input<br />

Overflow<br />

Filter<br />

Pump<br />

Figure 6-11 - <strong>GPS</strong>-X Membrane Bioreactor Objects<br />

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

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