ERG (Air Pollution Control) Ltd products

ERG’s mass transfer technologies commonly used for scrubbing applications (ie cleaning contaminants from a gas stream by dissolving them into a scrubbing liquor) can be used for stripping, where a clean gas is used to remove undesirable contaminants from a liquid stream. Stripping is commonly used for cleaning up water streams which are contaminated with relatively low concentrations of contaminants which will readily vaporise – these tend to be contaminants which are normally a gas at room temperature and are water soluble, for example, H2S, ammonia, and chlorine.

As well as stripping inorganic contaminants from water streams, ERG has experience of removing VOCs from polluted water. A recent example of this is at a UK oil reprocessing refinery. Raw water contaminated with a mixture of VOCs including BTEX (benzene, toluene, ethylbenzene, xylene) is fed to ERG’s stripper which operates using air at ambient temperature. The BTEX removal efficiency from the water stream is a maximum 99.8% allowing the water to be reused on the site.