Eskom aiming to 'freeze' pollution from power station and mine wastewater streams.


The research unit of State-owned power utility Eskom has invested R8.3-million in a pilot eutectic freeze crystallisation plant at its innovation centre in Gauteng in an effort to test whether the solution could be deployed as an alternative water treatment technology at its power stations – one that eliminates all effluent liquid discharge and materially reduces it raw water consumption.

Researchers at the Rosherville campus are even optimistic that the solution will not only prove viable in recovering power-station water, but could also enable Eskom to begin treating acid mine drainage (AMD) for use in its plants, offering a new source of water that is currently regarded as a major negative aspect of South Africa's mining legacy.

The demonstration plant has been built at Eskom's Research and Innovation Centre, south of Johannesburg, and will begin operating within weeks.

The investment forms part of a far broader portfolio of research, testing and development initiatives being pursued by Eskom in areas as diverse as energy storage and renewable technologies, through to smart metering, lighting and coal analysis.

Eskom to freeze pollution
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