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Pre-treating water with non-thermal plasma

United States Patent

9,695,068
July 4, 2017
View the Complete Patent at the US Patent & Trademark Office
The present invention consists of a method of pre-treatment of adulterated water for distillation, including adulterated water produced during hydraulic fracturing ("fracking") of shale rock during natural gas drilling. In particular, the invention is directed to a method of treating adulterated water, said adulterated water having an initial level of bicarbonate ion in a range of about 250 ppm to about 5000 ppm and an initial level of calcium ion in a range of about 500 ppm to about 50,000 ppm, said method comprising contacting the adulterated water with a non-thermal arc discharge plasma to produce plasma treated water having a level of bicarbonate ion of less than about 100 ppm. Optionally, the plasma treated water may be further distilled.
Cho; Young I. (Cherry Hill, NJ), Fridman; Alexander (Philadelphia, PA), Rabinovich; Alexander (Cherry Hill, NJ), Cho; Daniel J. (Wayne, PA)
Drexel University (Philadelphia, PA)
14/ 071,990
20140124357
November 5, 2013
GOVERNMENT RIGHTS This invention was made with government support under Contract No. DE-AC26-07NT42677 awarded by the Department of Energy (RPSEA Program). The government has certain rights in the invention.