At Coal South Africa, water treatment plants are used extensively to treat mine-affected water.
The flagship eMalahleni water reclamation plant, built in partnership with BHP Billiton and the eMalahleni Municipal Council in 2007, treats around 25,000 m3 of mine-affected water every day, which meets the potable water needs of nearby mines and provides drinking water for 80,000 people.
The treatment process produces gypsum-based by-products, which are used in the manufacture of cement and fertiliser industries. Gypsum is also used for making building materials – it is mixed with cement, clay and water and baked to produce bricks, blocks and panels for constructing homes.
Anglo American has built 60 houses from the gypsum-based building materials.