• Odorous emissions can lead to considerable nuisance in the neighbourhood
• The required level of odour reduction is required by law in most countries. In Germany it is formulated as a goal of the Federal Immission Control Act
• The exact requirements for permissible odour emissions and the limits of reasonable odour immissions in Germany are regulated in more detail in the GIRL. In the future it is to be expected that these requirements of the German guideline will be included in the TA-Luft
• Odour is often a mixture of substances and therefore results as the sum effect of a large number of odour-prone individual substances. It is not uncommon for there to be several hundred individual substances and gases of the most varied concentrations and properties (water soluble / non water soluble hydrocarbons, chemical substances, etc.)
• As diverse as the individual substances of the odour are, as diverse are the technological possibilities for odour reduction
• Frequently used processes for odour separation are bio scrubbers, bio filters, adorbers, chemical scrubbers or thermal systems
• The odour concentration, the hedonic and the odour characteristics also result from complex interactions of the individual substances. The achievable separation performance of different exhaust air purification technologies can only very rarely be predicted with the known process engineering calculation models. Therefore, it is often advisable to carry out tests with a suitable exhaust air purification system in advance.
• With our process engineering test plants and more than 250 supplied large-scale exhaust air purification plants for the removal of odours alone in various industries and very different odour-laden exhaust air compositions, we have the necessary competence and experience in this field.

Do you have any questions on odorous emissions? If you have any further questions, please do not hesitate to contact us! We look forward to hearing from you:
info(at)wessel-umwelttechnik.de

• VOC: Volatile Organic Compounds
• The term solvent covers irritant, allergenic or even carcinogenic substances, with mostly varying degrees of harmful effects on humans and animals as well as the environment as a whole.
• Solvents are often contained in paints, varnishes, resins or adhesives and are released during drying processes or in biological processes such as waste treatment.
• Depending on the concentration and water solubility of the VOC and taking into account all economic advantages, we clean the exhaust air using biological, chemical or thermal methods - partly also in combination with adsorption processes.

Do you have any questions on solvent separation? If you have any further questions, please do not hesitate to contact us! We look forward to hearing from you:
info(at)wessel-umwelttechnik.de

• Pollutants are all organic and inorganic compounds which are often odour-intensive and have a harmful effect on humans and the environment.
• Typical pollutants are volatile chemical substances from production processes such as formaldehyde and other aldehydes, ammonia, hydrogen sulphide (H2S) or acids (HF, HCl).
• Wessel offers turnkey plant systems made of the most varied materials tailored to the respective application (including various stainless steels or plastics) or plants with special coatings for the separation of pollutants.

Do you have any questions on the subject of pollutant separation? If you have any questions or are interested, please do not hesitate to contact us! We look forward to hearing from you:
info(at)wessel-umwelttechnik.de

• Formaldehyde is a volatile organic compound.
• Formaldehyde naturally occurs in wood and is used in the production of binders and adhesives. In addition, this compound is used in many applications, e.g. in the cosmetics or textile industry.
• Formaldehyde is carcinogenic and has a toxic and carcinogenic effect on humans and the environment.
• The reduction is required by law (see also BImSchG, TA-Luft, GIRL).
• Wessel has extensive experience and competence in the absorption and degradation of formaldehyde by microorganisms.
• With more than 200 large-scale plants on the market, the name Wessel stands for very good and cost-effective separation in bio-scrubbers.
• sophisticated and reliable systems, especially for applications with hot exhaust gases

Do you have any questions on formaldehyde separation? If you have any questions or are interested, please do not hesitate to contact us! We look forward to hearing from you:
info(at)wessel-umwelttechnik.de

• Aerosol is a mixture of fine solid or liquid particles in the exhaust air.
• The types of aerosols are diverse - sticky, flammable, fine to very fine particles
• Depending on the physical properties, it is possible to separate aerosols effectively and mechanically via mass force separators or alternatively via filtering separation systems.
• Depending on the application. We have the right solution for you.

Do you have any questions on the subject of aerosol separation? If you have any questions or are interested, please do not hesitate to contact us! We look forward to hearing from you:
info(at)wessel-umwelttechnik.de

Particles are air pollutants with different particle size distributions - usually in solid form. The particles differ, among other things, in their density and other physical properties (such as hardness, adhesion). Wessel uses various systems for particle separation:

• Separation systems for dust and fine dust separation from exhaust air and hot gases
• Dry separator by means of fabric titration (in different versions)
• Wet separators of various process technologies and designs

Do you have any questions on particle separation? If you have any questions or are interested, please do not hesitate to contact us! We look forward to hearing from you:
info(at)wessel-umwelttechnik.de

• Ammonia is a poisonous and strong smelling gas.
• The reduction of NH3 is required by law (see also BImSchG, TA-Luft, GIRL).
• Ammonia is water soluble and can be easily and reliably degraded in chemical scrubbers.
• Wessel offers turn-key systems with stainless steel or plastic scrubbers for the separation of ammonia with different aqueous absorbents, depending on the task and recycling objective

Do you have any questions on ammonia separation? If you have any questions or are interested, please do not hesitate to contact us! We look forward to hearing from you:
info(at)wessel-umwelttechnik.de