The initial considerations for designing the biological wet air scrubber were minimizing operating expenses and conserving energy. This type of wet air scrubber requires minimal water and energy, since the volume of circulating wash water is quite low. The biological wet air scrubber reduces ammonia emissions by 70%, odor by 45%, and fine particles by 75%.

Biological scrubbers treat gaseous contaminants in an airstream by passing it through a bed of microorganisms that feed on the gaseous molecules, consuming the H2S and other compounds, and removing them from the airstream. These microorganisms live on a high surface inorganic bed inside the dedicated vessel at a low pH.

The biological scrubber consists of a gas scrubber and a biological reactor. In the wet scrubber, the components that need to be eliminated are absorbed from the gas stream by the wash water. In the biological reactor, the pollutants that have been absorbed by the wash water are biologically degraded. The purified scrubbing liquid is circulated to the scrubber, where it is able to reabsorb pollutants.

The biologically degradable hydrocarbons are converter into H2O in the biological scrubber. The non-degradable hydrocarbons remain in the wash water. Components such as H2S and NH3 are converted into sulfate and nitrate respectively. Regular draining needs to take place in order to keep down the salt content and the level of non-degradable hydrocarbons. This can take place based on conductivity or via fixed discharge.

There are three different biological wet air scrubber types available to suit any application:

• vertical towers
• horizontal crossflow style
• combination “plug&play” units

The biological reactor can be set up as an active sludge system or a biofilm system on a carrying material. Systems with a carrying material normally have a lower sludge production to degrade specific sulfur and chlorine components, bacteria cultures are sometimes injected and have been specifically grown in laboratory settings.

A new type of wet air scrubber, Scroiler™ cleans air from gases, dust, vapors, and other admixtures using water or other cleaning liquid.

Scroiler™ produces the cleaning mist differently from other scrubber systems, which results in running costs that are much lower than for a common wet air scrubber. Scroiler™ is the new type of wet air scrubber that saves water.

If you would like to purchase Scroiler™, please contact us at info@optromix.com