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GPS-X Technical Reference

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311 Others Models<br />

DISINFECTION UNIT<br />

Figure 11-8 - Typical Outputs for Solid Bed Volume and Expansion for<br />

Struvite Recovery Reactor<br />

Empirical Model (Empiric) with Chlorine Disinfection<br />

The empiric model associated with this object computes the fraction of surviving E. coli<br />

based on the detention time in the disinfection unit. The state variables are not affected<br />

by this model. The following equation is used as the model for computing the surviving<br />

fraction:<br />

Equation 11.9<br />

where:<br />

survecoli<br />

kill<br />

= fraction of surviving E.coli<br />

= rate of kill (m 3 /g/min)<br />

ccl 2 = chlorine dosage (g/m 3 )<br />

t de<br />

= detention time (computed from volume/flow rate)<br />

The chlorine dosage, rate of kill, and volume of the unit are specified as operational<br />

parameters.<br />

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

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