METHOD OF TREATMENT OF PRODUCED WATER AND RECOVERY OF IMPORTANT DIVALENT CATIONS
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United States of America Patent
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Issued Date -
Sep 20, 2012
app pub date -
Mar 14, 2012
filing date -
Mar 15, 2011
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Abandoned
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Abstract
Provided herein are systems and methods for use in wastewater treatment. In some examples, the systems and methods involve different combinations of ion exchange and membrane based systems and processes that can be used to remove radium and recover and purify barium and strontium salts to render the wastewater depleted of those regulated toxic metals. Treated wastewater having less than 12000 pCi/L of any of radium, barium or strontium is then subjected to tertiary treatment where it is subjected to processes in an evaporator/crystallizer which drives out water in the form of vapor, leaving behind salts of innocuous metals such as sodium, calcium, and magnesium, among others. In some examples, water vapor from the processes is condensed to produce water suitable for reuse, such as reuse in the hydro-fracturing process.
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