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Title: 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:
 [1];  [1];  [1]
  1. (Richland, WA)
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA
OSTI Identifier:
868323
Patent Number(s):
US 5118447
Assignee:
Battelle Memorial Institute (Richland, MA) PNNL
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 = {1992},
month = {1}
}

Patent:

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