When large scale infiltration and harvesting are not practical, biofiltration can provide a high level of treatment and partial runoff reduction capability above and beyond tradition designs. Many regulators may favor biofiltration before traditional designs are considered.
Where stormwater runoff mitigation goals can’t be met through infiltration and rainwater harvesting, biofiltration can provide a high level of treatment and partial reduction of runoff volume. The UrbanGreen BioFilter is a compact, versatile and reliable alternative to conventional designs.
The UrbanGreen BioFilter soil media is optimized for pollutant removal, hydraulic conductivity and biological vitality. Pollutants are primarily removed by filtration during a storm event and are transformed, assimilated and/or absorbed between runoff events by the soil and plant community. The UrbanGreen BioFilter may also include one or more StormFilter cartridges which provide reliable pollutant removal for the portion of the design storm that exceeds the capacity of the biofilter bay.
Use the UrbanGreen™ BioFilter to create the small-scale, decentralized treatment required in LID designs. Multiple units in a parking lot or along roadways will create several drainage areaa providing treatment throughout your site. Filtration through a deep media bed provides a high level of treatment and some runoff reduction. Open top systems with trees or shrubs provide more landscaping options.
Install the UrbanGreen™ BioFilter upstream of a subsurface infiltration system, like perforated corrugated metal pipe (CMP), in order to expand runoff reduction capacity.
Add volume storage upstream of the UrbanGreen™ BioFilter to increase capacity of each unit. Our Slotted Drain can also extend the inlet capacity and inlet location for challenging drainage areas.