RWE Power International Acid Mine Drainage Case StudyThe need for our expertise In 1988, RWE applied for a mining permit to mine up to 40 million tons of lignite per year from the new Garzweiler II opencast mine. One of the essential preconditions for the permit was a significant reduction of acid mine drainage from the future mine. Acid mine drainage is a serious problem accompanying any metal and coal mining activity when sulphides are

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