Attached Growth Design: trickling filter
tf packing river rock specific surface to tf recirculation ratio partial
Attached growth biological treatment design parameters — trickling filter (low rate, high rate, partial BOD, nitrification), TFSC, TFAS, IFAS, MBBR carrier properties and removal/volumetric fluxes, and BAF volumetric loadings, oxygen transfer, denitrification loadings, and backwash rates. Source: Metcalf & Eddy Wastewater Engineering 5th Ed., Chapter 9.
| process type | parameter id | parameter name | unit | value max | value min |
|---|---|---|---|---|---|
| trickling filter | tf packing river rock specific surface | River rock specific surface area | m²/m³ | — | 50 |
| trickling filter | tf packing river rock void space | River rock void space | % | — | 55 |
| trickling filter | tf packing verticalflow specific surface high | Plastic vertical flow packing specific surface area (high) | m²/m³ | — | 131 |
| trickling filter | tf packing verticalflow specific surface low | Plastic vertical flow packing specific surface area (low) | m²/m³ | — | 102 |
| trickling filter | tf recirculation ratio high rate plastic | Recirculation ratio - high rate plastic | QR/Q | 2 | 1 |
| trickling filter | tf recirculation ratio high rate rock | Recirculation ratio - high rate rock | QR/Q | 2 | 1 |
| trickling filter | tf recirculation ratio low rate | Recirculation ratio - low rate | QR/Q | 1 | 0 |
| trickling filter | tf recirculation ratio nit | Recirculation ratio - BOD removal and nitrification | QR/Q | 2 | 1 |
| trickling filter | tf recirculation ratio partial | Recirculation ratio - partial BOD removal | QR/Q | 2 | 0 |
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