Absorption systems operate as scrubbers.

Flue gases are directed into and upward through a large cylindrical tank, where they encounter a downward spray of some solvent, in which they dissolve.

The solvent can then be removed, evaporated, and collected for future use. Or it can be incinerated or otherwise discarded, destroying the VOCs in the process.

In the past two decades, a number of novel systems for the control and removal of VOCs have been developed.

One such technology is biofiltration. In this type of system, flue gases are passed through a large tank containing microorganisms that digest and degrade the organic chemicals in the gases.

The waste products of this process are carbon dioxide and water, harmless compounds that can be released directly to the environment.