Microbial removal of no_x from gases

Patent 5077208 Issued on December 31, 1991. Estimated Expiration Date:

June 4, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Inventor

Sublette, Kerry L.

Assignee

ABB Environmental Services Inc.

Application

No. 532825 filed on 06/04/1990

US Classes:

435/168, Preparing element or inorganic compound except carbon dioxide435/170, Using bacteria435/244, Chemical stimulation of growth or activity by addition of chemical compound which is not an essential growth factor; stimulation of growth by removal of a chemical compound435/266, Treating gas, emulsion, or foam435/822, Using bacteria or actinomycetales435/824, Achromobacter435/832, Bacillus435/859, Micrococcus435/874Pseudomonas

Examiners

Primary: Lee, Lester L.
Assistant: Kraus, E. J.

Attorney, Agent or Firm

Berneike; Richard H.

International Class

C12P 003/00

Abstract

Disclosed is a process by which a gas containing nitric oxide is contacted with an anaerobic microbial culture of denitrifying bacteria to effect the chemical reduction of the nitric oxide to elemental nitrogen. The process is particularly suited to the removal of nitric oxide from flue gas streams and gas streams from nitric acid plants. Thiobacillus dentrificians as well as other bacteria are disclosed for use in the process.

Other References

Bergey's Manual of Determinative Bacteriology, 8th ed., Buchanan, R., N. Gibbons eds. pp. 456-458, 460 (1974)
Studies on Thiobacillus denitrificans by Baalsrud & Baalsrud (Arch. Microbiol., 20,34 (1954))
Intermediates of Denitrificantion in the Chemoautotroph Thiobacillus denitrificans by Ishaque & Aleem (Arch. Mikro 94, 269 (1973)
Reduction of Oxidized Inorganic Nitrogen Compounds by a New Strain of Thiobacillus denitrificans (Arch Mikro., 103, 31 (1975)