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For over twenty years, Labiotest has invested in research and innovation activities to study new air treatment solutions and technologies improving odor abatement. Among the most important partnerships, are included CNR- Consiglio Nazionale delle Ricerche, ISPESL- istituto Superiore Prevenzione e Sicurezza sul Lavoro, Ministero della Sanità, Politecnico di Milano, EPA – US – Environmental Protection Agency, Università degli Studi di Udine. This is the reason why Labiotest is proud to offer the best solutions in odor abatement, and to have among its clients some outstanding names of the food industry and fast food enterprises.

Labiotest chooses a continuous improvement and enhancement of its control strategies to prevent environmental risks and damages and, at the same time, to achieve increasingly intelligent systems, always in accordance with norms.

The studies reported underline the high-quality performance standard of Labiotest solutions and show the efficiency in terms of odor concentration abatement “Cₒ”.


An Osmogenic Barrier is realized by spreading in the air a “dry fog”, made of water micro-drops, continuously or at regular intervals; each of these micro-drops contains a significant number of micelles. When these are spread in the air, they come into touch with malodorous molecules and make them imperceptible from an olfactive standpoint. This action removes the malodorous molecules from the environment in a fast and harmless way. The basic requirements for a product to be usable in an osmogenic barrier is to be innocuous and completely safe and harmful for men, animals and plants, and to be readily biodegradable. Read more ▼▲

The idea of air cleansing brought to the elimination of those traditional deodorization products, based on a “covering effect”, a strong and pleasant smell that tries to cover up the unpleasant smell, or based on neutralization, that instead is given thanks to the reaction of specific chemical groups. Air cleansing based on a chemical-physical method more than on a strictly chemical one.
Follow-up à Osmogenic Barriers “QUADERNI DI TECNICHE E PROTEZIONE AMBIENTALE” – n.65, A. Zavatti, Pitagora Editrice – BO; in collaboration with Chemistry Dpt “Giulio Natta”, Politecnico di Milano, l’University of Udine and LOD – Laboratorio Olfattometria Dinamica, Spinoff Uniud. Read more ▼▲

Osmogenic barriers are an air cleansing technique and their action is based on the use of specific products diluted with water. The reason why this methodology exists is found in the chemical-physical properties of the products that are involved, that guarantee both economic and environmental affordability. These products contain hydrophobic groups consisting of rather long hydrocarbons chains. Due to their properties, these chains are able to form large molecular aggregates of various types, called micelles. “Water treatment processes are now well known, with their use of synthetic cleansers, soaps or other molecules of natural origin. The cleaning process takes place when a critical micelle concentration (CMC) is reached, below which micelles cannot form, or they form with a useless geometry. The cleansing action takes place as the fat or dirt molecules find more favorable conditions (from the energetic point of view) inside micelles rather than in an outside watery solution. In other words, the foam forming on the surface encapsulates fat or dirt particles and removes them without producing any chemical reaction. Air cleansing can be based on the same type of process. In particular, molecules forming micelles must have characteristics that are such as to encapsulate and stop molecules which generate smells. Osmogenic molecules are usually much smaller and rather polar if compared to fat and dirt molecules present in the case of an air cleansing process. It is thus necessary to use adequate molecules with micelles having a structure that does not prevent polar compounds (osmogenic molecules) from going through.

Labiotest guarantees the efficiencies of its solutions through olfactometric investigations performed in accordance with European Standard EN 13725:2004. Test showed that efficiency rate goes between 55,5 and 79,9% depending of applied water working solution of antiodor products.



Even though carbon adsorption is historically known for its wide-ranging applications, it is not suitable in cooking odorous emissions, at all. The causes belong to multiple factors: high temperature, limited adsorption capacity of certain substances, incompatibility with fatty acids, oils, amines, unstructured proteins and solid particulate matter, impossibility of modulation with respect to varying concentrations and the impossibility to operate in 100% optimal conditions (e.g. the air low-crossing speed 0,5m/s, residence times over 1 second). All of these factors show how limited and inefficient the use of activated carbon technology is. Read more ▼▲

Consequently, the installation of carbon filters (…) is exclusively a containment measure, that will only exploit the initial capacity of activated carbons to retain gaseous substances odors.
Moreover, loss of pressure-tests do refer to the initial status of activated carbons (at their first use). It is necessary to underline that at 80°C their effectiveness is equal to 0.
Activated carbons, like any other passive resistance element (baffles, grids, anti- grease filters, curves, couplings, etc.) do get dirty and create occlusions/obstructions, that with time become new elements of odor pollution.
The alternative solution to activated carbon system is Zephiro UTS, that thanks to its simplicity in use, advanced technology and no invasiveness, solves odor emissions problems and complies with the following requirements:
– control of draught unaltered;
– no changes of sections to contain loss of pressure;
– no insertions in the exhaust pipe;
– no substitution of parts subject to cleansing (frames, panels, ..)

Odors abatement efficiencies in various fields of application are always tested with olfactometric investigations carried out as of the European standard EN 13725, the results of which confirmed Labiotest odor abatement efficiency in all the investigated fields.

Thanks to the olfactometric and environmental research, olfactive harassment is today recognized by the law as criminal offence.


Zephiro UTS