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

Abstract

A biofilter is described 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 is described 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. 6 figs.

Inventors:
Issue Date:
Research Org.:
EG & G Idaho Inc
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
672663
Patent Number(s):
5,795,751
Application Number:
PAN: 8-719,831
Assignee:
Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States) PTO; SCA: 540120; PA: EDB-98:121354; SN: 98002026882
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 18 Aug 1998
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; NITROGEN OXIDES; GRANULAR BED FILTERS; BACTERIA; AEROBIC DIGESTION; REDUCTION; DENITRIFICATION; WOOD WASTES; AIR POLLUTION CONTROL

Citation Formats

Apel, W.A. Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions. United States: N. p., 1998. Web.
Apel, W.A. Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions. United States.
Apel, W.A. Tue . "Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions". United States.
@article{osti_672663,
title = {Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions},
author = {Apel, W.A.},
abstractNote = {A biofilter is described 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 is described 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. 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {8}
}