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Disclosed are systems and methods for dissolving gases into a fluid that is passing through a force-main and gravity sewer system. The system includes a dissolution tank having a pressure vessel for containing a liquid and for providing a regulated gas head space above the liquid, an inlet that permits passage of wastewater into the gas head space, and an outlet that permits passage of treated wastewater out of the pressure vessel. The system also includes a gas source in communication with the pressure vessel; a pump for supplying wastewater from a force-main or sewer system sump into the pressure vessel under conditions effective to dissolve oxygen gas in the wastewater; and a discharge device in communication with the outlet of the dissolution tank assembly for discharging treated wastewater.


Biological and Agricultural Engineering

Patent Number


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US 20130056423 A1

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Board of Trustees of the University of Arkansas (Little Rock, AR); BlueInGreen, LLC (Fayetteville, AR)


STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH The present invention has been supported at least in part by the National Science Foundation SBIR Program, Grant No. IIP-0750402DMI-041955. The Government has certain rights to the invention.

Gregory S. Osborn, Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR