Air pollution is the fourth greatest overall risk factor for human health worldwide, with high blood pressure, dietary risks, and smoking. Among the major air pollutants, fine particulate matter is the most damaging to human health. Sulfur oxides, nitrogen oxides, and ozone are associated with various illnesses. In addition to human health, air pollution is a risk to the environment, the economy, and food security.  Air pollutants arising from human activity overwhelmingly derive from energy production and use, mainly the combustion of fossil fuels and biomass. Nearly all emissions of sulfur dioxide and nitrogen oxides into the atmosphere are linked to energy, as well as about 85% of particulate matter emissions.

In the energy sector, the primary contributors to sulfur dioxide are power generation and industry, largely due to coal consumption. Oil use in vehicles and power generation are the leading emitters of nitrogen oxides. Consumption of biomass, kerosene, and coal in the building sector, along with industrial use, are responsible for the bulk of the particulate matter reaching the atmosphere.
A wet scrubber is a device designed to remove a contaminant from an air stream using a scrubbing fluid or solution. The contaminants can be solids, liquids, or gasses, and the solution is water-based and non-aqueous.
Some common contaminants wet scrubbers are most capable of removing include:

Contaminant	Size	Examples
Gases (molecular size)	<0.008 microns	Hydrochloric acid, sulfur dioxide
Fumes (solids particulate)	<1-micron	Metallurgical
Dust (solid particles)	>1-micron	Minerals, cement, flour, etc.
Mist (liquid particles)	01-10 microns	Oil, acid, caustic, etc.
Droplets (liquid particles)	>10 microns	Sprays

Redwood Technology has several Scroiler™s installed on the funnels of the coal power station and CHP (combined heat and power) boilers for highly efficient cleaning of flue gasses from ash and SOx. For example, the company installed a Scroiler™ system at the coal CHP which provides the small town with heat and energy. This CHP station is equipped with a 3 tons per hour capacity boiler and a mechanical stoker that consumes ordinary coal. The output power of CHP is 2.5 MW. If you would like to know more information about Scroiler™ please feel free to contact us at info@optromix.com.