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Improved oxygen wastewater treatment More restrictive environmental
regulations have many industries looking for ways to improve their wastewater treatment systems. The use of pure oxygen as an alterna tive to air offers major advantages in the effectiveness of the treatment
liquid is pumped downwards ment vessel. The hood captures through the draft tube, entraining most of the undissolved oxygen oxygen contained under the hood. for reuse by the system, with ad The pumping action of the ditional oxygen requirement sup impeller ensures adequate gas-liq plied through an inlet in the hood. For more information, uid contact and bulk liquid mix ing within the wastewater treat circie repiy card No. 106
and in operating cost-efficiencies. The use of pure oxygen can sig nificantly reduce or eliminate the emissions of VOC(volatile organic compounds), BOD (biochemical oxygen demand)and odours, com pared to air-based systems. Oxygen-based systems, like Praxair's I-SO™ (In-Situ Oxygenation™) mixing unit, combined
/
with an on-site VPSA (vacuum
/
pressure swing adsorption) oxygen generating system, are adaptable to both new and upgraded treatment facilities.
Praxair has acquired Liquid V —
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Carbonic Industries, making us^ the world's largest supplier of carbon dioxide and a good deal more
Praxair's In-Situ Oxygenator has a 90-h% oxygen utiiization rate.
When used to upgrade an exist ing air-based treatment plant, the ISOWPSA combination can repre sent as little as half the capital costs and use a third less power than the
It vastly expands our
ability
to provide a full menu of atniospheflc^y wLw
process and specialty gases. It gwds
air-based alternative. In a new in
stallation,the I-SO mixing unit com petes favourably with traditional aerators on the basis of both capital cost and power consumption. I-SO was developed in re sponse to the need for an im proved method of dissolving oxy gen into wastewater, delivering an oxygen utilization rate greater
us new capacity and expertise to serve
- •> ^
almost any industry in 44 countries
^worldwide. And it lifts our revenues
^^4k^^ove|4 billion, making our future
than 90%. The unit consists of
two main parts - a power section which consists of a motor; a gear box and an impeller/draft tube assembly; and a hood/floatation assembly. As the impeller rotates.
impiuSlcmi Making our planet more productive.; ■fafmore inlortnadon please call 1-800-PRAXAIR e-mail: info @ praxair.com tf'cnnrfai'.mf.
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