Benefits

MBF-Series: Manhole Biofilter

The bioteg manhole biofilter is a specially designed manhole insert to biologically remove odours from sewer manholes. Microorganisms in the filter material break down the malodourous substances before they can reach the open air.

The GullyQUICK System allows fitting the biofilter into the manhole without tools - in a matter of seconds. Of course it can be easily removed for sewer system maintenance.

Several thousand bioteg Manhole Biofilters are being used successfully by public and private industries throughout Germany, Austria and Switzerland.
Special sizes are available upon request.

REBF-Series : Vent Pipe Biofilter

These biofilters have been specially designed to reduce odours from various vent pipes.

They are simply inserted into the vent pipe.

We offer the Vent Pipe filters in a standard range of sizes from 4-17 inches, however, special sizes are available upon request.

EBF-Series : Drop-In Biofilter

A biofilter designed to treat contaminated air from covered storage basins, such as sedimentation tanks.

These filters are mainly used as passive biofilters, but can be upgraded into active biofilters at any time. The filters are suspended on a flange ring on the cover, treating the contaminated air of the enclosed system before it is released.

SRBF-Series : Circular Stand-Alone Biofilter

A small, compact biofilter designed to treat small airstreams wherever odour emissions occur, particularly in sewage treatment plants, landfills and sewage storage systems.

These filters have mostly been used to deal with sewer odour problems, however, they can be applied to relieve a variety of different odour problems (food or chemical industry, rendering plants, paper processing, etc.).

They can be used as inexpensive passive biofilters (displacing method), and are readily upgradeable to active biofilters, at any time, by the addition of a cover and a fan.

To adapt to higher airstreams (of up to 1,200 cfm), our Circular Stand-Alone Biofilters can be run in a two or three stage operation series.

DEBF-Series : Force Main Biofilter

These biofilters have been designed in conjunction with various German wastewater engineers and technicians to reduce sewage odour along force mains.

The filter is mounted, above or belowground, to the connecting piece of an air release valve.

The filters can be run in series for greater airflow rates.

MCBF-Series : Modular Container Biofilter System

What is Biofiltration?Biofiltration is an air pollution control technology which utilizes microorganisms to biologically degrade odors and other volatile air pollutants contained in waste air streams. The microorganisms exist on the surface, and in a thin water film surrounding the surface, of the biofilter material. During the biofiltration process, the contaminated air is slowly pumped through the biofilter material. The pollutants are adsorbed onto the filter materialīs surface, and absorbed into the water film. Simultaneously, the microorganisms biologically consume i.e. metabolize the pollutants, producing energy, biomass, and metabolic end products, mainly CO₂ and H₂O. The biofiltration process results in a complete decomposition of the pollutants, creating no hazardous byproducts

What are Biofilters?Biofilters are technical appliances that use the biofiltration process to remove odorous compounds and other air pollutants, like volatile organic compounds (VOC), from waste air. The name "biofilter" may be confusing, conjuring up images of normal filters, which simply separate pollutants from fluids or gases. In a biofilter, the pollutants are "consumed" by the microorganisms, and degraded into biomass, water and CO₂. This allows the filter material to continually regenerate itself. The term bio-catalyst or bio-reactor would therefore be more suitable, however the name biofilter is commonly accepted and used.  

R-CH₃ ------> CO₂ + H₂O + Biomass

- Organic Sulphur containing Compounds

R-SH ------> SO₄^2- + Biomass
R-SH ------> SO₄^2- ------> Biomass

- Organic Nitrogen containing Compounds

R-NH₂ ------> NO₃^- + Biomass
R-NH₂ ------> NO₃^- ------> Biomass

R = organic rest

The most important reaction of the degradation process is the oxidation of carbon, sulphur, and nitrogen compounds to CO₂, SO₄^2- and NO_3-, and their assimilation into biomass. At times of reduced input concentrations, microorganisms also assimilate nitrates (NO₃) and sulphates (SO₄^2-) into biomass.

The Design of a Biofilter The easiest design of a biofilter is the age-old practice of covering landfills with soil. The odorous air rises through the layer of soil, where microorganisms degrade the odorous compounds. However, to plan, design and build a biofilter that will continuously function reliably, it takes technical and microbiological expertise and experience. A crucial prerequisite for the successful functioning of biofilters, is the creation and maintenance of suitable physical and chemical conditions for microorganisms to thrive. This includes maintaining the right temperature, moisture, pH-value and amount of nutrients. Bioteg Biofilter Systems therefore consist of the following basic components:

• Ventilator
• Air humidifier (with integrated heating, if necessary)
• Air distributor
• Filter material
• Control Panel

Biofilter Material  The performance of a biofilter depends to a great extent on the filter material. The filter material adsorbs the odorous compounds or other air pollutants from the waste air stream. Naturally existing microorganisms on the organic material receive the energy and nutrients they need from the decomposition of these compounds. In practice there are many different filter materials in use: composts, bark or bark products, peat products, heather, lava, etc. Bioteg has developed a very effective filter material based on shredded pine roots. A specific preconditioning procedure increases the mediaīs surface area, which is populated by microorganisms. The filter materialīs low pressure drop provides for low energy costs. Our filter material is extremely stable, and alters its physical and microbiological properties only slightly over time. There is practically no long-term compaction of the filter bed. Therefore, Bioteg Biofilters continue to function reliably for three to seven years, depending on the environmental conditions. After this time, the used filter material can be readily composted without further treatment.

• Municipal and industrial wastewater treatment facilities
• Landfills
• Chemical manufacturing
• Food Processing Industries
• Breweries
• Tobacco Industry
• Paper and Cardboard Processing

• Biofiltration is an easy and cost-effective technology .
• Biofiltration has a very high odour and VOC removal efficiency.
• Biofilters have low investment and operation costs.
• Bioteg biofilters are practically maintenance free.
• The biofiltration process results in a complete decomposition of the pollutants, creating no hazardous by-products.
• The biofilter material is an organic, non-toxic, bio-degradable material that can be readily composted after use.
• All in all, biofiltration has been accepted by residents and regulators as an environmentally friendly and cost-effective odour and air pollution control technology.