Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions

Apel, William A

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Title: Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions

Abstract

A biofilter for reducing concentrations of gaseous nitrogen oxides in a polluted gas comprises a porous organic filter bed medium disposed in a housing, the filter bed medium including a mixed culture of naturally occurring denitrifying bacteria for converting the nitrogen oxides to nitrogen gas, carbon dioxide, and water. A method of reducing concentrations of nitrogen oxides in polluted gas comprises conducting the polluted gas through the biofilter so that the denitrifying bacteria can degrade the nitrogen oxides. A preferred filter medium is wood compost, however composts of other organic materials are functional. Regulation of pH, moisture content, exogenous carbon sources, and temperature are described.

Inventors:

Apel, William A ^[1]

Idaho Falls, ID

Issue Date:: 1998-01-01

Research Org.:: EG & G IDAHO INC

OSTI Identifier:: 871787

Patent Number(s):: 5795751

Assignee:: Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)

Patent Classifications (CPCs):: A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

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A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL
A61L2209/14 - Filtering means
A61L9/16 - using physical phenomena

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D2251/95 - Specific microorganisms
B01D2256/10 - Nitrogen
B01D2256/22 - Carbon dioxide
B01D2257/404 - Nitrogen oxides other than dinitrogen oxide
B01D53/56 - Nitrogen oxides
B01D53/565 - {by treating the gases with solids}
B01D53/85 - with gas-solid contact

C - CHEMISTRY C12 - BIOCHEMISTRY C12P - FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE {
C12P3/00 - Preparation of elements or inorganic compounds except carbon dioxide {

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02A - TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
Y02A50/20 - Air quality improvement or preservation

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P20/59 - Biological synthesis

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DOE Contract Number:: AC07-76ID01570

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: biofilter; removal; nitrogen; oxides; contaminated; gases; aerobic; conditions; reducing; concentrations; gaseous; polluted; gas; comprises; porous; organic; filter; bed; medium; disposed; housing; including; mixed; culture; naturally; occurring; denitrifying; bacteria; converting; carbon; dioxide; water; method; conducting; degrade; preferred; wood; compost; composts; materials; functional; regulation; ph; moisture; content; exogenous; sources; temperature; described; nitrogen oxide; nitrogen gas; filter bed; medium disposed; moisture content; naturally occurring; medium including; organic materials; nitrogen oxides; carbon dioxide; filter medium; carbon source; organic material; contaminated gas; gaseous nitrogen; mixed culture; porous organic; contaminated gases; denitrifying bacteria; gas comprises; organic filter; aerobic conditions; /435/

Citation Formats


                    Apel, William A. Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions.  United States: N. p., 1998. 
        Web.

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                    Apel, William A. Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions.  United States.

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                    Apel, William A. Thu .  
        "Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions".  United States.  https://www.osti.gov/servlets/purl/871787.

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@article{osti_871787,

  title        = {Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions},

  author       = {Apel, William A},

  abstractNote = {A biofilter for reducing concentrations of gaseous nitrogen oxides in a polluted gas comprises a porous organic filter bed medium disposed in a housing, the filter bed medium including a mixed culture of naturally occurring denitrifying bacteria for converting the nitrogen oxides to nitrogen gas, carbon dioxide, and water. A method of reducing concentrations of nitrogen oxides in polluted gas comprises conducting the polluted gas through the biofilter so that the denitrifying bacteria can degrade the nitrogen oxides. A preferred filter medium is wood compost, however composts of other organic materials are functional. Regulation of pH, moisture content, exogenous carbon sources, and temperature are described.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1998},

  month        = {1}

}

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Works referenced in this record:

Denitrification: production and consumption of nitric oxide.
journal, January 1994

Ye, R. W.; Averill, B. A.; Tiedje, J. M.
Applied and Environmental Microbiology, Vol. 60, Issue 4
https://doi.org/10.1128/AEM.60.4.1053-1058.1994

The use of denitrifying bacteria for the removal of nitrogen oxides from combustion gases
journal, December 1993

Apel, William A.; Turick, Charles E.
Fuel, Vol. 72, Issue 12
https://doi.org/10.1016/0016-2361(93)90360-E

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Similar Records

Title: Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions

Abstract

Citation Formats

Denitrification: production and consumption of nitric oxide. journal, January 1994

The use of denitrifying bacteria for the removal of nitrogen oxides from combustion gases journal, December 1993

Denitrification: production and consumption of nitric oxide.
journal, January 1994

The use of denitrifying bacteria for the removal of nitrogen oxides from combustion gases
journal, December 1993