Thermochemical nitrate destruction
Abstract
A method is disclosed for denitrification of nitrates and nitrites present in aqueous waste streams. The method comprises the steps of (1) identifying the concentration nitrates and nitrites present in a waste stream, (2) causing formate to be present in the waste stream, (3) heating the mixture to a predetermined reaction temperature from about 200 C to about 600 C, and (4) holding the mixture and accumulating products at heated and pressurized conditions for a residence time, thereby resulting in nitrogen and carbon dioxide gas, and hydroxides, and reducing the level of nitrates and nitrites to below drinking water standards.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7073164
- Patent Number(s):
- 5118447
- Application Number:
- PPN: US 7-684717
- Assignee:
- Battelle Memorial Inst., Richland, WA (United States)
- DOE Contract Number:
- AC06-76RL01830
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 12 Apr 1991
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 54 ENVIRONMENTAL SCIENCES; NITRATES; REMOVAL; NITRITES; WASTE WATER; DENITRIFICATION; WATER TREATMENT; CHEMICAL REACTIONS; HYDROGEN COMPOUNDS; LIQUID WASTES; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; WASTES; WATER; 320305* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management; 540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-)
Citation Formats
Cox, J L, Hallen, R T, and Lilga, M A. Thermochemical nitrate destruction. United States: N. p., 1992.
Web.
Cox, J L, Hallen, R T, & Lilga, M A. Thermochemical nitrate destruction. United States.
Cox, J L, Hallen, R T, and Lilga, M A. Tue .
"Thermochemical nitrate destruction". United States.
@article{osti_7073164,
title = {Thermochemical nitrate destruction},
author = {Cox, J L and Hallen, R T and Lilga, M A},
abstractNote = {A method is disclosed for denitrification of nitrates and nitrites present in aqueous waste streams. The method comprises the steps of (1) identifying the concentration nitrates and nitrites present in a waste stream, (2) causing formate to be present in the waste stream, (3) heating the mixture to a predetermined reaction temperature from about 200 C to about 600 C, and (4) holding the mixture and accumulating products at heated and pressurized conditions for a residence time, thereby resulting in nitrogen and carbon dioxide gas, and hydroxides, and reducing the level of nitrates and nitrites to below drinking water standards.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 02 00:00:00 EDT 1992},
month = {Tue Jun 02 00:00:00 EDT 1992}
}
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