The technology behind

How a biofilter works

On the concrete floor a slatted floor is installed, on top of which a plastic mesh is laid, on top of the plastic mesh 15 cm of leca is laid, on top of which 1m3 of BBK biofilter material perm2 is laid. The biofilter material is inoculated with selected microorganisms. A sprinkler system is installed to irrigate the filter. The odorous airflow is directed in at the bottom and pushed upwards as completely fresh air.

The temperature in the biofilter is optimally maintained at 15-35°C, which provides maximum cleaning effect and ensures that the active microorganisms effectively break down odorous substances.

A BBK filter, unlike many other biofilters, cannot degrade and become inactive. Before inoculating the filter with the specific microorganisms, we perform a heat treatment that completely eliminates unwanted weed seeds, germs and other microorganisms. This ensures optimal odor removal.

The filter is designet for upflow air filteration

and the air is pushed upwards in the system

BBK delivers top of class up to 99.8% odor removal

We continuously measure our systems to ensure optimal cleaning.
Purification rates vary from industry to industry from 99.8% purification at Norsk Protein Hamar to 93.3%.

Animal rendering – Norsk Protein Hamar

Biogas – Ribe Biogas

Slatted floor with an expanded clay support

The filter media does not degrade or become inactive

BBK BIOfilters cover all sizes and industries

Building – Biogas, Denmark

When the biofilter was established, it was a regulatory requirement that the biofilter had to be divided into 3 sections. This means that air can still be cleaned in the filter when servicing and replacing the filter material.

Concrete tanks – Animal feed, Denmark

The biofilter is built in 2 slurry tanks with PVC cloth as a cover. A center column and air overpressure keep the fabric stretched. Pre-filter is located in the building in front.

Kassette – Fish farming, Norway

The biofilter is built in a cassette of sandwich elements as a plug and play solution.

Concrete building – Slaughterhouse, Denmark

The biofilter is in a building adapted to the space conditions and therefore widest at one end.Built in concrete elements with PVC fabric as a cover. A center column and air overpressure keep the fabric stretched.

Sections – Wastewater Treatment Plants, Sweden

The biofilter is built in between 2 sedimentation tanks, the filter is divided into 2 sections. The photo shows the inside of the biofilter.

BBK biofilter inoculated with microorganisms

Integrated irrigation system provides maximum odor removal

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