electrofilters, bag filters and wet scrubbers have been employed in the industries for the particles capture [16,17]. The dry particu- late control systems such as electrofilters involves high operating, and initial installation cost and require frequent maintenance and others such as cyclones cannot achieve satisfactory removal effi- ciency while handling very fine sub-micron sizes of the particles [15].
Wet scrubber is one of the air pollution control devices that can be used to remove particle and gaseous pollutants from industrial exhaust streams by using an absorber liquid, simultaneously. In wet scrubbing, an atomized liquid, usually water, is used to capture particulate dust or to increase the size of aerosols. Increasing size facilitates separation of the particulate from the carrier gas. The particles may be caught first by the liquid, or first on the scrubber structure, and then washed off by the liquid [18].
In scrubbing systems, several parameters play an important role in capturing particles. Usually, the smaller the droplet size and the larger the number of droplet, the better the ability to capture smaller sized particles. Thus, the key to effective particle capture in a wet scrubber is creating a mist of tiny and many droplets. A high relative velocity between particles and liquid droplets also promotes particle capture [19].
If the diameter of the aerosol is less than 0.1