Stage 1+2 | Stage 3 | Stage 4 | Stage 5
Treatment Stage 3 SEL Permafilter® Biomat
The SEL Permafilter® Biomat is a standard SEL Permavoid® unit (see page 7) which incorporates a floating oil absorbent mat (Biomat). The SEL Permafilter® Biomat has two main treatment features:- The capture of residual hydrocarbons which escape from the SEL Permachannel® (i.e. in the event of a catastrophic spillage such as a ruptured HGV engine sump).
- The promotion of a self-maintaining ecosystem, with bacteria digesting the captured hydrocarbons and protozoa regulating the bacteria. The air layer above the Biomat encourages microbes to form a biofilm on top of the Biomat that use trapped hydrocarbons as a sole nutrient source, thus removing pollutants through biodegradation. As the Biomat is a floating component, the biofilm is always kept above the water level within the system preventing bacteria being flushed away during storm conditions.
Separate technical and research papers are available for this product on request.
Key Features
- Captures residual hydrocarbons and other pollutants
- Removes pollutants by biodegradation
- Provides a third stage of water treatment within the SEL Source Control System
- Catastrophic spillages intercepted and treated at source
- Replaces sub-base, minimises the requirement for imported aggregates
- Shallow construction, minimises residual excavated material
- Satisfies designers’ risk assessments in accordance with CDM
- Improves water quality
- Manufactured from recycled material and also recyclable
- Lightweight and easily handled (3Kg per unit)