Abstract
Due to its chronic toxicity, selenium is a growing concern in many mining activities. Veolia has developed a new treatment method for selenium removal, which is based on biological reduction of selenium to selenite, its subsequent removal using surface complexation on ferric oxyhydroxide, and further biological oxidation of the treated water. The purpose of this presentation is to open discussion on the reasons pushing the development of this new biological and chemical approach and its main characteristics. Results from laboratory tests will be presented to support the potential of the proposed water treatment chain.