Clean TeQ Aromatrix recently installed a combined Catalytic Iron Filter and Activated Carbon Filter system to treat up to 3,450 ppm of Hydrogen Sulphide gas together with other sulphur and volatile organic compounds. The system was installed for Melbourne Water’s Eastern Treatment Plant and has now been operating since August 2022. The Catalytic Iron Filters use ‘rusted’ (Iron Oxide) metal Pall rings which under controlled moisture conditions, reacts with gaseous Hydrogen Sulphide to form Iron (II) Sulphide. The Catalytic Iron Filters achieve a Hydrogen Sulphide reduction efficiency of up to 90%. The Activated Carbon Filters provide the remaining treatment to achieve an outlet concentration of less than 0.1 ppm Hydrogen Sulphide and less than 500 OU. Recent performance testing has shown inlet odour concentrations up to 360,000 OU being treated to below detection (<30 OU).