Bio filter BIOFILTER™

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. Targeted Pollutants 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.