The biological filtration processes provide the use of a wide range of ubiquitous microorganisms (bacteria, fungi, yeasts), capable of metabolizing most of the natural compounds, organic and inorganic, through biological reactions, oxidations, reductions and hydrolysis.
The principle on which the operation of the biofilter is based, it is mainly related to the possibility to create a suitable condition for the survival of microorganisms in terms of availability of oxygen, temperature, acidity, availability of micronutrients and organic substrate, as a source of carbon and energy.
In the biofilter, the substances to be purified are absorbed on the soft and porous material that makes up the filter bed (peat, wood chips, compost, vegetable mixtures), they are dissolved in the aqueous film bathing and / or humidifying the material, and make they so available to the microorganisms present in the matrix of which consists the filter bed.
Biofilters that we propose can be in containers, for gas emission flow rates up to about 8,000 m3 / h. Biofilters built in containers have the advantage of being pre-assembled, easily transportable and can operate in all weather conditions. In addition they have an integrated technical room.
For higher flow rates has to be used open systems (also with double reaction room), with no constraints in terms of capacity and easy to make (high ratio performance / price). The system can be fully open, but for areas subject to adverse weather conditions are usually applied protective covers, even for controlling the biological process in the reaction chamber.