The biofilter in this project was rehabilitated and the biomass in the filter was replaced with TASK. Biofilters are used to remove odours and other volatile organic compounds from air streams, which are often released during industrial processes, waste treatment or agricultural activities.
The biofilter in this project had been damaged, which had reduced the effectiveness of the odour treatment. The filter materials, which break down odour compounds through biological processes, had reached partial saturation and were compacted. This had led to a decrease in the air purification capacity of the plant, posing a risk of odour nuisance in the surrounding area.
Replacing the biomass in the biofilter
The most important step in this recovery was to replace the biomass in the biofilter. Biomass refers to the biological material in the filter that serves as a medium for the growth of micro-organisms, such as bacteria and fungi. The biomass consists of a specific mixture of organic material, often in several layers, that provide an optimal microclimate for the microorganisms. Some commonly used filter fillings are:
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Tree bark
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Peat
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Heather
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Cocunut fiber
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Rootwood
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Expanded clay granules
The new biomass was carefully chosen based on the specific requirements of the biofilter.
Environmental impact
Thanks to the repair work and optimisation by TASK, the biofilter is now operating again in optimal condition, with increased odour removal capacity and a long service life for future operation. The repaired biofilter contributes to a sustainable and environmentally friendly odour treatment process. Biofilters do not use harmful chemicals which makes it an environmentally responsible solution for odour treatment. This intervention allows the system to effectively remove odours again and contribute to better air quality.
