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Drak, A. | Water in Mining Conference, 9-10 April, Toronto, ON, 34 slides, 2019

The MaxH2O Desalter technology was pilot-tested to measure its effectiveness of treating acid mine drainage. The system removes sulfate ions by crystallization of calcium sulfate in the CrystalactorŽ while concentrating the wastewater in a reverse osmosis (RO) system. During the pilot, continuous crystallization of the calcium sulfate in the integrated salt precipitation unit maintained the saturation index in the range of 800%-1,200% during operation. The system operated without the addition of chemicals other than antiscalant and produced pellets of more than 90% dry solids content that do not require further sludge dewatering treatment. Depending on the effluent requirements, the obtained RO brine stream can be partially or completely blended with the RO product, further increasing the total recovery of the system. Also see

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