The Marshalls CPM Biofilter™ is an innovation biofiltration system that harnesses the natural treatment action of vegetation and the filtration power of specially engineered soils.
Above ground the Marshalls CPM Biofilter™ looks like a normal tree box, with a suitable plant or small tree growing through the decorative grating in a precast concrete cover slab at pavement level. Underneath, the precast concrete chamber contains a layer of enhaunced mulch on top of a unique soil filter medium to deliver high levels of surface water threatment.
Surface water is channelled into the Biofilter™ through a kerbside inlet, through an inlet pipe or directly from the surface and flows through the mulch, plant and soil filter media, providing high-performace, high-flow filtration that targets sediment, hydrocarbons, heavy metals and nutrients.
- Very fine particles
- Dissolved, liquid and sediment bound hydrocarbons
- Gross pollutants
- Sediment bound heavy metals
- Sediment bound nutrients
- Dissolved pollutants
The Marshalls CPM Biofilter engineers in nature’s way to enhaunce any urban environment even where space is at a permium or where a retrofit surface water treatment solution is required. Suitable for residential or commercial settings, car parks and roadways.
The Hydro-Brake Optimum® chamber comprises of a precast concrete chamber base containing a bespoke Hydro-Brake Optimum® Flow Control which is delivered to site ready for immediate installation.View Hydro-Brake Chambers
Marshalls CPM in a joint venture with Hydro International has introduced a Stormwater treatment system called the Downstream Defender®, an advanced hydrodynamic vortex separator.View Downstream Defenders