Carbon adsorption is highly efficient and achieves high levels of removal, especially with VOCs and odours.
However with large flows it may prove uneconomical. A useful procedure is to combine the economy of wet scrubbing or stripping with a subsequent ‘polish’ with activated carbon. The packed tower will remove the bulk of the contaminant while the final fraction (plus stray components not scrubbed or stripped) can then be adsorbed without prematurely exhausting the rather costly carbon bed. Operating conditions and humidity levels are critical for carbon adsorption but the technique will usually accommodate variable flows. An economical approach to larger or variable throughputs is to design an adsorption unit with two or more beds operating in parallel.
Solvents, volatile organic compounds (VOCs) and other contaminants in the liquids or gas phase can be adsorbed onto activated carbon. The principle of adsorption is […read more]
- Very efficient and excellent odour removal
Carbon needs to be replaced regularly
Often combined with other scrubbing or stripping systems as ‘final polish’