Biofilter material, the core of the solution
The quality and composition of the biofilter material is critical to the process. Several micro-organisms in exactly the right proportions and conditions are working together on the biological break down of the odorous contaminants. Odour Balance© works with a variety of mixtures of biofilter material. Each material is specially composed to cope with the individual situation at hand. The biofilter materials are always fresh produced in a short period of time. This keeps the biological activity of the product intact for a maximum effect.
Odour Balance uses carefully selected materials such as:
French maritime pine bark
This hard bark has a density of 350 kg/m3, is free of mould and rot and is reduced to more or less square sections from between 40 and 100 mm. Plastics and metals are no part of the volume and sand and dust are less than 1%. The volume of parts of wood is never over 10%. The moisture content is below 40%. French maritime pine bark is reddish brown coloured and is known for its durability and efficiency.
This bark comes from Western European countries and has a density of 350 kg/m3. The product is free of mould and rot and is reduced to more or less flat parts of between 20 and 100 mm. Plastics and metals are no part of the volume and sand and dust is less than 1%. The volume of parts of wood is never over 10%. The moisture content is below 50%. Depending on specific needs, the fraction can be adjusted for example between 40 and 60 mm.
Stumps of various native trees are reduced to jagged fractions of different sizes, the most chosen ones are: 40 to 80 mm, 80 to 120 mm and 40 to 400 mm, often build in as a combination of fractions or used as low density air flow layer beneath other bio filter media. Because of its jagged structure torn root does not let itself screen on fraction easily, therefore a deviation of 15% of the volume is accepted. Pollution is limited to a minimum.
Wood Chips and chunks
Stems of trees are hacked or chipped to a fraction of between 5 and 200 mm. Smaller parts are being called chips, for the bigger parts(80 to 200mm) we use the term chunks. The density of this material is 250 to 350 kg/m3. the moisture content is below 60% Chunks are particularly suited as a structural material underneath other bio filter media or as an very open air flow layer underneath compost to let air filled with oxygen trough easily. Also in bio filters this structure assures a longer lasting air flow so the micro-organisms in upper layers do their job perfectly. Finer chips are used in the upper layers of bio filters.
Coconut fiber has a long resistance in combination with a large contact surface. It is slow and therefore has a long service life. Possibly a small amount of peat is added as ‘food’. It is widely used in sewage and process water treatment plants.