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GPS-X Technical Reference

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247 Attached-Growth Models<br />

This form contains further information about the backwash operation. Backwash can be<br />

initiated after a certain period (i.e. every 24 hours), or after a maximum allowable head<br />

loss is achieved (i.e. 1 m), or when the effluent solids reach a threshold level<br />

(i.e. 10 g/m 3 ). This last mode may be useful for optimizing plant performance in the<br />

mathematical model. In manual mode, the operation of the BAF has to be done through a<br />

Control window (or file input), which needs to be set up with all the operational<br />

variables.<br />

Further model parameters are included in the mass transport, stoichiometric, kinetic<br />

and filtration menu items in the BAF model. These forms are described in the Trickling<br />

Filter Model section of this chapter and in the Sand Filtration Models section developed<br />

in Chapter 9.<br />

Figure 7-19 - More Advanced BAF Operational Parameters<br />

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

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