Biological exhaust air cleaning is always required if exhaust air needs to be purified of volatile organic components - the so-called 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 climate-relevant 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 know-how 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 Wessel-Umwelttechnik for decades.
The modern cleaning systems from Wessel-Umwelttechnik work efficiently. Thanks to the continuous monitoring of the plant parameters, they require only a minimum of operating effort. A very high level of plant availability and operational safety is guaranteed in Wessel's biological exhaust air cleaning plants due to the plant design and the components used.
LOW OPERATING COSTS
Particularly when treating large exhaust air volumes, our bio scrubbers and biofilters are characterised by low operating costs – due to low pressure losses of the entire plant and low energy costs because of the use of heat recovery systems.
Unlike many thermal cleaning systems for exhaust air, Wessel's biological exhaust air cleaning systems are extremely resource friendly. The systems do not emit any climate-critical, harmful secondary emissions. The use of fuels is not necessary. Emissions generated during combustion processes such as CO, CO2, NOx, nitrous oxide, or dioxin do not occur.
Wessel-Umwelttechnik relies on two different biological processes for cleaning exhaust air containing pollutants and odorous substances: BIOCAT bio scrubbers and BIOCAT biofilters. Of central importance for both biological exhaust air cleaning systems are microorganisms and biocatalysts that break down pollutants and odours into naturally formed products such as carbon dioxide and water. A prerequisite for this is that the exhaust air components are bioavailable and have a certain solubility in water.
The decision for one of the above systems depends on the specific application. Which system represents the best available technique for biological exhaust air treatment depends, among other things, on the composition of the raw gas, the concentrations of the harmful or odorous substances to be separated, the physical-chemical characteristics of the ingredients (e.g. water solubility), on further exhaust air components such as dust, the exhaust air temperature and the available space on site.
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