Green H2S scrubber are suitable for use on sites with a high gas flow but do not require the use of chemicals at any stage in the process. instead Sulphur oxidation bacteria, of the Thiobacillus family, lives on the media which is packed into an acid proof tanks.

A liquid nutrient, NPK nutrient or digested sludge liquor, is constantly re- circulated within the tank and sprayed across the media. The temperature of the tank must be maintained within 35 – 40 degree centigrade in order for the hydrogen Sulphide (H2S) to be converted into sulphate through a series of oxidations.