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):
- 5795751
- Application Number:
- PAN: 8-719,831
- Assignee:
- Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States)
- 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}
}