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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:
 [1]
  1. (Idaho Falls, ID)
Issue Date:
Research Org.:
EG & G IDAHO INC
OSTI Identifier:
871787
Patent Number(s):
5795751
Assignee:
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID) INEEL
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.
Apel, William A. Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions. United States.
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.
@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}
}

Patent:

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