Filterra – High Flow Rates, High Pollutant Removal
How Filterra Works
1. Stormwater runoff enters the Filterra system through a curb-inlet opening and flows through a specially designed filter media mixture contained in a landscaped modular container. The filter media captures and immobilizes pollutants; some of these pollutants are then decomposed, volatilized and incorporated into the biomass of the Filterra system’s micro/macro fauna and flora. Stormwater runoff flows through the media and into an underdrain system at the bottom of the container, where the treated water is discharged.
- 2. The standard configuration utilizes a downstream catchbasin for bypass flows allowing the shallowest profile
(typical 1.3 m) and most flexible design.
Filterra Features and Benefits
Multiple third party field tests confirmed that Filterra achieves verified pollutant removal under TAPE and TARP testing
Filterra offers the most cost effective stormwater treatment system featuring easy installation and simple maintenance
Landscaping enhances the appearance of your site making it more attractive while removing pollutants
Available in multiple configurations, sizes and shallow profile (1.3 m)
No confined space access. Activation and first year of maintenance is included with the purchase of every system
Simple and easy maintenance
Obtain up to 12 points for LEED Certification
- Standard (offline)
- Street Tree
- Recessed Top
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Filterra Media – Proven Pollutant Removal
At the heart of the Filterra system is Filterra engineered biofiltration media; a specified gradation of washed aggregate and
organic material homogeneously blended under strict quality controlled conditions. Using data from independent, third-party
studies including the University of Virginia (TARP), Herrera Environmental Consultants (TAPE), Terraphase Engineering (NJCAT),
North Carolina State University (TAPE & TARP) and Geosyntec Consultants, the filter media has been optimized to operate under
high flow rates while maintaining pollutant removal performance. Filterra media is tested for hydraulic functionality, fertility, and
particle size distribution to ensure uniform performance.
Filterra media also supports a vegetation component with suitable hardiness for the local region consisting of grasses, shrubs,
or trees that assist with the adsorption of pollutants with biological uptake/storage and pollutant consumption by microbes
within the plant root zone.
|MEASURED POLLUTANT REMOVAL PERFORMANCE
||Median Removal Efficiency
||Median Effluent Concentration (mg/L)
||Third Party Reference Studies
|Total Suspended Solids
||UVA 2006, Herrera 2009, Herrera 2014, NC State 2015
|Total Phosphorus (TAPE)
||Herrera 2014, NC State 2015
||NC State 2015
||UVA 2006, Herrera 2009
||UVA 2006, Herrera 2009, NC State 2015
|Total Petroleum Hydrocarbons
Information above is based on results from third party field studies following industry recognized protocols such as TAPE and TARP. Relevant studies are noted
for each pollutant, and corresponding data was aggregated to provide realistic and repeatable performance expectations.
Based on more than 20 years of research and development, quality control, testing and field monitoring, Filterra’s water quality treatment performance has been recognized by some of the most significant regulatory agencies, including the states of: Washington, Virginia, Maryland and New Jersey, the District of Columbia, the Texas Commission on Environmental Quality and the Atlanta (GA) Regional Commission. Highlights regarding these approvals include:
- Granted ESD (Environmental Site Design) status by the state of Maryland Department of the Environment (MDE)
- GULD-approved for ALL pollutants of concern with the state of Washington Department of Ecology (WA ECOLOGY) with (2) TAPE field tests
- Third-party nationally recognized field/lab tests completed: (1) TARP, (2) TAPE, (1) NJCAT and (1) NC-DENR
Installation and Maintenance
We make it easy for you...
- Vegetation selection guidance based on your climate zone and salt tolerance.
- On-site planting and activation included with every system.
- The first year of maintenance is included with the purchase of every system.
- Ongoing maintenance is simple:
- - No confined space entry required, everything can be accessed from the surface.
- - Clean biofiltration bay with simple landscape tools (rake and shovel).
- - Replace hardwood mulch.
COLD CLIMATE CONSIDERATIONS
Bioretention systems such as Filterra rely on the vegetation to assist in pollutant removal. Winter road clearing efforts can wreak havoc on roadside landscaping and stormwater structures.
For the best performance, Imbrium recommends the following:
- Use salt tolerant plants. Refer to Imbrium’s recommended plant list for Filterra systems
- Consider using taller vegetation for increased visibility during large snow events, and suitable system placement to avoid plows and snow piling
- Perform maintenance at the end of winter, and flush the plant with water to washout remaining salt