Calculations
Percolator Biologic Filter
Input data
Sewage average flow
Maximum average flow
Minimum average flow
Sewage average BOD
Number of filters
Filter diameter
Filter depth
Adopted filter type
Recirculation rate
Output data
Hydraulic rate, recirculation included - see Notes 1
Volumetric organig loading rate - see Notes 2:
Expected efficiency
Effluent BOD
Input data
Output data
Description
Given the incoming average and maximum flow, the incoming BOD, the number of filters, the geometric characteristics of each filter and the recirculation flow, calculates the treatment efficiency and the effluent BOD.
Percolator Filter
Operation and project caracteristcs of PBF
| Support environment | Rocks | Plastic |
|---|---|---|
| Number | 1 | 2 |
| Hidraulic load minimum (m³/m².day) | 10 | 10 |
| Hidraulic load maximum (m³/m².day) | 50 | 75 |
| Organic load (kg BOD/m³.day) | <1.2 | <3.0 |
| Minimum depth (m) | 1.5 | 4 |
| Maximum depth (m) | 2.5 | 12 |
| Minimum recirculation ratio | 1 | 1 |
| Maximum recirculation ratio | 2 | 3 |
| Minimum efficiency of BOD removal (%) | 80 | 80 |
| Maximum efficiency of BOD removal (%) | 90 | 90 |
References
- ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. NBR 12219:2011 - Elaboração de projetos hidráulico-sanitários de estações de tratamento de esgotos sanitários. Rio de Janeiro, ABNT, 2011.