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Title: Pre-treating water with non-thermal plasma

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.
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Issue Date:
OSTI Identifier:
Drexel University NETL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2013 Nov 05
Research Org:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org:
Country of Publication:
United States

Works referenced in this record:

Fluid Treatment Using Plasma Technology
patent-application, September 2010

Mechanism of Calcium Ion Precipitation from Hard Water Using Pulsed Spark Discharges
journal, November 2010
  • Yang, Yong; Kim, Hyoungsup; Starikovskiy, Andrey
  • Plasma Chemistry and Plasma Processing, Vol. 31, Issue 1, p. 51-66
  • DOI: 10.1007/s11090-010-9269-9

Electrohydraulic Discharge and Nonthermal Plasma for Water Treatment
journal, February 2006
  • Locke, B. R.; Sato, M.; Sunka, P.
  • Industrial & Engineering Chemistry Research, Vol. 45, Issue 3, p. 882-905
  • DOI: 10.1021/ie050981u