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Bioremediation - Treatment of Acid Mine Drainage

Treatment of Acid Mine Drainage


Acid Mine Drainage (AMD) is a common problem around the world where mining plays an important role in the economy. The passive treatment of AMD using sulfate-reducing bacteria (SRB) in anaerobic wetlands in a common technology employed. It is popular because it requires little maintenance and any contaminants that precipitate out remain in the wetland waters (Johnson & Hallberg, Acid mine drainage remediation options: a review, 2005a). A downside is that it requires significant land space and so can be an expensive option. Anaerobic wetlands can remove many metals including iron, zinc and aluminium from waters draining from mines. Figure 5 shows a typical anaerobic wetland system.


Figure 5 – Typical anaerobic wetland

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