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Emission of air pollutants are becoming more and more strict. To ensure a total removal of pollutants, DMT can provide activated carbon units. Gaseous contaminants, that are insoluble or barely soluble in water, such as most hydrocarbons, can be removed from air by passing this air through an active carbon filter. These units can be customer designed, depending on pollutant components, concentration and airflow. The contaminants, present in the contaminated airflow, are adsorbed onto the active carbon.
In the course of time, the active carbon becomes saturated and has to be replaced. The carbon removed has to be treated as a chemical waste, and has to be disposed of as such a waste.
Active carbon filters are frequently applied for small-scale odour removal but, because of the high operating costs, are used less frequently in treating large air flows. In principle, it is possible to make the exhausted carbon again suitable for use, by blowing steam through it to remove the adsorbed contaminants.
This method of operation is economically viable only for very large installations with a large quantity of active carbon. When regenerating the active carbon, care has to be taken that when the contaminants are driven out, they do not then enter the environment.
Advantages of the DMT activated Carbon Units
- Guaranteed total removal of pollutants;
- Low maintenance;
- Suitable for non continuous processes;
- Implementation on a large variety of pollutants.
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