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GPS-X Technical Reference

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295 Digestion Models<br />

Figure 10-15 - Reactor Parameters Input Form<br />

Fraction of un-reacted flow-through solids<br />

It is well known that UASB/EGSB reactors are not very effective in treating the<br />

suspended solids in the wastewater. A fraction of the solids in the influent stream may<br />

just flow through the UASB/EGSB reactor without getting adsorbed or reacted in the<br />

reactor. This parameter allows users to specify the fraction of solids which will pass<br />

through the reactors un-reacted. Although, this phenomenon is normally observed, it is<br />

not very well quantified. The default value of this parameter is set at 0.5. In actual<br />

situation, depending on the bed expansion, the value of this parameter may vary.<br />

Average granule size<br />

This parameter is used to calculate the settling velocity of the granules in the granular<br />

bed. The estimated settling velocity is also used in estimating the bed expansion in the<br />

reactor. A default value of 2mm is used.<br />

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

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