Praxair Gets New Permit

By Walter F. Roche Jr.

Tennessee environmental officials have issued a separate permit to Praxair, Inc. a major supplier of liquefied carbon dioxide to the soft drink industry.
Praxair, which operates on the same Green County site as US Nitrogen, will get carbon dioxide in gas form from US Nitrogen LLC, and then liquefy it before shipping to customers.
The permit, which was issued Thursday by the Air Pollution Control Division of the Tennessee Department of Environment and Conservation, will be effective until April 1, 2029.
Praxair initially did not have a separate permit but was covered under a permit issued to US Nitrogen.
The seven-page permit sets annual limits on the amount of carbon dioxide the company can produce and also limits some of the air pollutants it can emit.
Under the permit Praxair must limit opacity at 20 percent for any six minutes in a one hour period and to four six minute periods in any 24 hour period. The company must also maintain records of emissions in any start ups or shutdowns.
The permit limits the company's water use to 2,400 gallons per minute and limits the amount of liquefied carbon dioxide produced to 90,789 tons per any 12 month period.
Finally the company must maintain logs showing the amount of carbon dioxide received from US Nitrogen and the amount of liquefied carbon dioxide shipped out.
Yet another permit is expected to be issued to Yara, Inc. which also operates on the same Midway site and previously was covered under a US Nitrogen permit.
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