COAL-FIRED POWER PLANT IN NORTHEAST USES ION EXCHANGE SERVICE FOR METALS REMOVAL REMOVAL OF TRACE METALS FROM RUNOFF TO MEET DISCHARGE LIMITS When a coal-fired power plant in the Northeast discovered that the runoff from its ash pile contained vanadium levels exceeding discharge limits, it contacted Evoqua Water Technologies, formerly USFilter, for assistance. The plant’s small retention pond contained roughly 400,000 gallons of water with 30 ppm of vanadium that leached from the coal ash. Operators asked Evoqua for a temporary solution that would remove the vanadium to less than 4 ppm. Evoqua performed water analysis and submitted several technologies for consideration, including temporary-mobile reverse osmosis (RO), chemical treatment, ion exchange or simply trucking the wa

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