Biofilters

Biofilters remove odours and biodegradable pollutants from exhaust air. The air flows through a moist, organic filter material – such as root wood or wood chips – that is colonised by microorganisms. They break down the odorous substances and pollutants, converting organic compounds mainly into carbon dioxide and water. Biofilters are used wherever odour-intensive exhaust air is produced, for example at sewage treatment plants, in the food industry, in agriculture and at biogas plants.

TS biofilter plants are built as single-stage or multi-stage systems as required. Trickle-bed reactors, chemical scrubbers or activated carbon filters can be installed upstream or downstream of the biological purification stage. Acid and alkaline scrubbers are also part of our scope of supply and can be integrated into the biofilters where required.

The essential process stages of a biofilter plant are:

  • Air conveyance
  • Dust separation
  • Heating or cooling
  • Humidification or scrubbing stages
  • Biological purification

Our biofilter plants meet the quality requirements of VDI guideline 3477.

Building designs

Biofilter container

  • Conditioning and biological stage combined in a single container unit
  • Technical room and conditioning unit with multiple container modules
  • Open and closed biofilter containers (with optional forced exhaust of purified air via chimney)
Biofilter plant for 100.000 m³/h exhaust air with chemical washer in a oil mill
Biofilter for 100,000 m3/h exhaust air from an oil mill
Biofilter container for a waste treatment plant in the west of france (24.000 m³/h)
Biofilter container unit for 24,000 m3/h with chemical pre-conditioning stages for a waste treatment plant in western France
Biofilter container (Material PE-HD) with an upstream, two-stage chemical washer for 20.000 m³/h from a biogas plant
Biofilter container (material PE-HD) with upstream two-stage chemical scrubber for approx. 20,000 m3/h from a biogas plant
Biofilter container with two-stage chemical washer for a waste treatment plant in France (25.000 m³/h)
Biofilter container with two-stage chemical scrubber for a waste treatment plant in France – approx. 25,000 m3/h air volume
Biological air treatment container for 22.000 m³/h exhaust air with a upstream biological desulphurization stage
Exhaust air treatment container for 22,000 m3/h with an upstream biological desulphurization stage
Biofilter container from PE and/or PP
Biofilter container in PE and/or PP
Biofilter 12.000 m³/h
Biofilter 12,000 m3/h
Inside view of a technical room of a biofilter
Inside view of a technical room of a biofilter

Round filter

  • Small Biofilter units without separate conditioning stage
Very small biofilter (up to 300 m³/h) in rotunda manner
Compact round biofilter for deodorisation of small exhaust air volumes (up to 300 m3/h)

Surface filter

  • Technical room and conditioning unit with surface filter (material PE)
  • Humidifier as countercurrent scrubber in stainless steel or PE
  • Surface filter open or with cover and chimney
Surface filter for 50.000 m³/h exhaust air
Surface filter for 50.000 m3/h exhaust air

Material

Due to the typically corrosive nature of the pollutants and their oxidation products, the following materials are used:

  • Polypropylene (PP)
  • Polyethylene (PE)
  • Glass fibre-reinforced plastic (FRP)
  • Coated steel
  • Stainless steel

Application

Applications include:

  • Municipal and/or industrial sewage treatment plants
  • Food industry
  • Chemical industry
  • Agriculture
  • Leather industry
  • Biogas plants
  • Paper industry
Questions about this product? We are happy to advise you – personally and without obligation.
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