Difference between revisions of "Unit processes of stormwater pre-treatment techniques"
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Revision as of 18:10, 15 July 2015
Unit processes of stormwater pre-treatment techniques (Adapted from WEF, 2008)
Link to this table
| Control | Vegetated filter strips | Vegetated swale | Forebays | Street/parking lot sweeping | Proprietary settling/swirl chambers | Oil/water separators | Green roofs | Cisterns | Drain inlet inserts |
|---|---|---|---|---|---|---|---|---|---|
| Peak flow attenuation | X | X | |||||||
| Runoff volume reduction | |||||||||
| Infiltration | X | X | |||||||
| Dispersion | X | X | X | ||||||
| Evapotranspiration | X | ||||||||
| Runoff collection and usage | X | ||||||||
| Sedimentation | X | X | X | X | X | X | |||
| Flotation | X | X | X | ||||||
| Laminar separation | X | ||||||||
| Swirl concentration | X | ||||||||
| Sorption | X | ||||||||
| Precipitation | |||||||||
| Coagulation | |||||||||
| Filtration | X | X | X | ||||||
| Plant metabolism | X | X | X | ||||||
| Nitrification/denitrification | |||||||||
| Organic compound degradation | |||||||||
| Pathogen die off | |||||||||
| Temperature reduction | X | X | X | ||||||
| Disinfection |