Thermochemical nitrate destruction
Abstract
A method is disclosed for denitrification of nitrates and nitrates 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.degree. C. to about 600.degree. 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:
-
- Richland, WA
- Issue Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- OSTI Identifier:
- 868323
- Patent Number(s):
- 5118447
- Assignee:
- Battelle Memorial Institute (Richland, MA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
- DOE Contract Number:
- AC06-76RL01830
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- thermochemical; nitrate; destruction; method; disclosed; denitrification; nitrates; aqueous; waste; streams; comprises; steps; identifying; concentration; nitrites; stream; causing; formate; heating; mixture; predetermined; reaction; temperature; 200; degree; 600; holding; accumulating; products; heated; pressurized; conditions; residence; time; resulting; nitrogen; carbon; dioxide; gas; hydroxides; reducing; level; below; drinking; water; standards; dioxide gas; residence time; waste stream; method comprises; carbon dioxide; reaction temperature; waste streams; aqueous waste; method comprise; concentration nitrate; oxide gas; /210/588/
Citation Formats
Cox, John L, Hallen, Richard T, and Lilga, Michael A. Thermochemical nitrate destruction. United States: N. p., 1992.
Web.
Cox, John L, Hallen, Richard T, & Lilga, Michael A. Thermochemical nitrate destruction. United States.
Cox, John L, Hallen, Richard T, and Lilga, Michael A. Wed .
"Thermochemical nitrate destruction". United States. https://www.osti.gov/servlets/purl/868323.
@article{osti_868323,
title = {Thermochemical nitrate destruction},
author = {Cox, John L and Hallen, Richard T and Lilga, Michael A},
abstractNote = {A method is disclosed for denitrification of nitrates and nitrates 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.degree. C. to about 600.degree. 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 = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}
Works referenced in this record:
Overview on the Application of Denitration in the Nuclear Field
book, January 1986
- Merz, E. R.
- Denitration of Radioactive Liquid Waste
Denitration of Reprocessing Concentrate by Means of HCOOH
book, January 1986
- Kelm, M.; Oser, B.; Drobnik, S.
- Denitration of Radioactive Liquid Waste