Steel in the News
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Posted by Tasha Weiss on September 24, 2012 at 4:29 PM.
Gerdau (an AISC member) recently announced that it has reused 220 billion gallons of water in the first half of 2012. This is sufficient to supply the New York metropolitan area (with an estimated population of 19 million) for one year, considering an average daily consumption of 33 gallons per person. Their goal for 2012 is to surpass the 97% average water recirculation rate achieved last year at its steel production plants around the world.
This year’s milestone resulted from ongoing investment in modern water treatment and recirculation systems used in the industrial process at all Gerdau mills. With these systems, the water used is treated with advanced technologies that allow its reuse and a significant reduction in water consumption. The small amount of water that is not reused (3% of the total) corresponds mainly to losses from evaporation.
Since 2010, the company has been working to develop a water balance model that involves more than 50 environmental experts from the company worldwide. The project, scheduled for completion in 2015, aims at reducing the volume of water captured for steel production and increasing the water recirculation rate.