Stormwater treatment system/apparatus
US5549817A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1995 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | Feb 13, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method and apparatus for treating contaminated stormwater runoff from roads and adjacent lands. A multi-stage and self-contained integrated module is designed to collect the first flush of stormwater runoff (which contains the majority of pollutants) and to treat the pollutants using sedimentation, filtration and constructed wetlands. The apparatus is mass-produced to provide standardized hydrologic controls, important to the reliability of the constructed wetland component of the apparatus. Raw stormwater enters the central sedimentation chamber of the apparatus which is divided into multiple segments designed to provide a series of sedimentation/filtration chambers. At least one chamber is provided with a removable filter bulkhead. Effluent from the final sedimentation chamber is discharged to the constructed wetland system which surrounds the central sedimentation tank. Water flows through the perimeter wetland system in subsurface/saturated conditions and contacts the root zone of the constructed wetland where biochemical interactions attenuate pollutants. A skimmer tube may be positioned in at least one chamber to pass water from near the surface through an adjacent bulkhead…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.