Biological cleaning - Import export

Bio scrubbers are systems for the biological cleaning of exhaust air and exhaust gases and thus for the reduction of odours and polluting emissions. In this process, air polluted with a wide variety of pollutants is cleaned with the aid of a washing liquid which is loaded with microorganisms and biocatalysts (various enzymes) taken from nature. The bio scrubbers from WesselUmwelttechnik work almost without wastewater and are therefore very sustainable, regardless of the nature of the exhaust air. The basic requirement, however, is that the ingredients are watersoluble and bioavailable. WesselUmwelttechnik supplies turnkey plants like the Wessel BIOCATScrubbers in single and multistage construction.

Biological exhaust air cleaning is always required if exhaust air needs to be purified of volatile organic components the socalled VOCs or odorous substances. The demand for biological procedures has increased in recent years. On the one hand, biological exhaust air cleaning does not generate any climaterelevant greenhouse gases. On the other hand, it meets all legal requirements for clean gas values. With over 200 biological exhaust air cleaning processes installed, Wessel has comprehensive practical knowhow and is the technology leader in the field of biological exhaust air cleaning. The biological exhaust air cleaning systems have been continuously optimised and further developed by WesselUmwelttechnik for decades. The modern cleaning systems from WesselUmwelttechnik work efficiently. Thanks to the continuous monitoring of the plant parameters, they require only a minimum of operating effort.

Operating principle With this type of scrubber, coarser solid particles and fibres are filtered out of the exhaust air. The DLP (Dust Low Pressure) scrubber from WesselUmwelttechnik has a number of advantages. In addition to a long operating period, this wet dust collector system scores with a constant separation performance. Wessel uses only highquality materials to manufacture scrubbers. This results in a high chemical resistance. Thanks to automatic monitoring of the process parameters during operation, the highest possible operational reliability is guaranteed. The system reacts automatically to changes in the inlet conditions. All in all, the DLP wet scrubber is easily operable due to the practiceoptimised control system. The power consumption is comparatively low due to low pressure losses. Typical areas of application The DLP scrubber is used, among other things, in connection with the Wessel BIOCAT scrubber, which is used for biological exhaust air cleaning.

Biological exhaust air cleaning is used whenever exhaust air has to be cleaned from volatile organic compounds (VOCs) and odours. Biofilters play a major role in this process. The polluted exhaust air is passed through a filter medium where the VOCs and odours are separated. Normally, this medium is an organic carrier material where microorganisms are grown on. They convert the VOCs and odours into noncritical components by means of their metabolism. Especially regarding the removal of odorous substances, biofilters are a very efficient and comparatively inexpensive way of biofiltration with an efficiency of up to 99 %. BIOCATbiofilters have a high degree of efficiency in a wide range of applications, even for exhaust air components that are difficult to dissolve in water.

If no procedures for biological or chemical exhaiust air cleaning are to be used efficiently, the thermal treatment is regarded as method of choice. The basic thermal processes are Recuperative thermal oxidation Regenerative thermal oxidation Catalytic oxidation. The focus of our products lies particularly in the periphery of especially challenging special solutions Waste treatment Sewage sludge drying Waste water treatment Landfill aftercare Specialpurpose solutions for the chemical industry Food industry In general at corrosive media, at risk of condensation, and especially high specifications for the pure gas Since 2018 we are working close with our sister company Airprotech Srl. from Magenta/Italy in the field of thermal exhaust air cleaning. Beside our core products our range of products in the field thermal exhaust air cleaning is broadened Airprotech is specialised in the development, the manufacture and the supply of turnkey plants for thermal cleaning