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Title: 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 A
Application Number:
PPN: US 7-684717
Assignee:
Battelle Memorial Inst., Richland, WA (United States) PTO; EDB-94-081360
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 = {1992},
month = {6}
}