Denitrification of water using bacteria
AssigneeNuQuatic, LLC
InventorsDonald A. Luke, Ryan Eugene Dickinson, Janie Michelle Hinson
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Abstract
Various embodiments relate to denitrification of water using bacteria. A method of denitrification of water includes deoxygenated water including a water-soluble form of nitrogen. The method includes exposing the deoxygenated water to denitrifying bacteria to convert the water-soluble form of nitrogen in the water to nitrogen gas that is removed and to form a denitrified water. The method also includes reoxygenating the denitrified water. Denitrifying bacterial substrates and methods of making the same are also provided.
Claims19
A method of denitrification of water, the method comprising:
- deoxygenating water comprising a water-soluble form of nitrogen, the deoxygenation comprising exposing the water comprising the water-soluble form of nitrogen to one or more sulfite compounds in the presence of a metal catalyst comprising iron, the one or more sulfite compounds comprising sodium sulfite, potassium sulfite, sodium bisulfite, sodium metabisulfite, potassium bisulfite, potassium metabisulfite, or a combination thereof;
- exposing the deoxygenated water to denitrifying bacteria to convert the water-soluble form of nitrogen in the water to nitrogen gas that is removed and to form a denitrified water, wherein the denitrifying bacteria is immobilized on a porous substrate comprising a ceramic that comprises a vitrification product of a mixture comprising peat;
- and
- reoxygenating the denitrified water, wherein the reoxygenated water has a total nitrogen concentration that is less than a total nitrogen concentration of the water comprising the water-soluble form of nitrogen and that is about 0.0 ppm to about 2 ppm total nitrogen.
A method of denitrification of water, the method comprising:
- deoxygenating water comprising a water-soluble form of nitrogen, the deoxygenation comprising exposing the water comprising the water-soluble form of nitrogen to one or more sulfite compounds in the presence of a metal catalyst comprising iron;
- exposing the deoxygenated water to denitrifying bacteria to convert the water-soluble form of nitrogen in the water to nitrogen gas that is removed and to form a denitrified water, wherein the denitrifying bacteria is immobilized on a porous substrate comprising a ceramic that comprises a vitrified mixture of a non-clumping clay, dolomitic limestone, CaO, and peat;
- and
- reoxygenating the denitrified water, wherein the reoxygenated water has a total nitrogen concentration that is less than a total nitrogen concentration of the water comprising the water-soluble form of nitrogen and that is about 0.0 ppm to about 2 ppm total nitrogen.
A method of denitrification of water, the method comprising:
- deoxygenating water comprising a water-soluble form of nitrogen;
- exposing the deoxygenated water to denitrifying bacteria to convert the water-soluble form of nitrogen in the water to nitrogen gas that is removed and to form a denitrified water, wherein the denitrifying bacteria is immobilized on a porous substrate comprising a ceramic that comprises a vitrification product of a mixture comprising peat;
- and
- reoxygenating the denitrified water.
Dependencies are inferred from the claim text.