Calculations
Recommendations
Parshall flume selection (Life Saneamento)Sodium hydroxideDrainage timeGradual expansionHead loss in water treatment trash racksDetermination of contact time - Ordinance GM/MS No. 888High performance percolator biologic filter
Default
Input data
Average upflow
Maximum upflow
Upflow BOD
Support environment
Filter's depth
Number of biological filters
Diameter of the filter
Recirculated sewage flow
Output data
Recirculation ratio
Recirculation factor
Hidraulic load for the maximum flow
Organic load
Efficiency
Downflow DOB
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.
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
- Jordão, E. P.,Pessôa, C. A. Tratamento de esgotos domésticos.7. Ed. Rio de Janeiro: ABES, 2014.