Design Options
Our System
Bohn Biofilter supplies a complete system: all equipment from fan to exhaust, and all services for successful construction, operation and performance verification. For our filter media, we analyze regional materials and engineer a blend of soil products with an enhanced microbial population.

The most important component of a biofilter is its media. The physical and chemical properties of our soil media make it the most efficient biofilter material available.

Soil is an excellent pH buffer. Low pH in biofilters/bioscrubbers causes corrosion and eliminates many microbial species.

Our soils media readily adsorb water (hydrophilic), whereas compost/wood chip media repel water when dry (hydrophobic). If moisture systems fail, so does the biofilter. A soil system simply needs to be rewetted.

The physical properties of our soil media are stable for decades. This means stable airflow; consistent back-pressure and even air distribution.


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Bohn Biofilter In-Ground System
Bohn Biofilter Concrete Vault system
Bohn Biofilter Grass and Rooftops System