Use of a chlorine dioxide precursor for controlling ion metabolism of bacteria in cooling water systems
AssigneeEcolab USA Inc.
InventorsAmit Gupta, David Hardie Rodman, Fritz Earwin Perez Monterozo, Dinesh Balkisan Mantri, Tomy Suryatama, Fajar Muhammad Rahman, Achmad Syah, Nugraha Yohannes Arifpin
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Abstract
A method of reducing activity of sulfur and/or nitrogen metabolizing bacteria is provided. The method includes adding a composition of an alkali metal salt of chlorite and/or an alkali metal salt of chlorate and hydrogen peroxide to process water of a cooling tower and increasing a concentration of the composition from about 0 ppm to about 300 ppm in about 1 to about 100 minutes.
Claims12
A method of reducing activity of a bacteria, comprising:
- adding a composition comprising an alkali metal salt of a chlorite and/or an alkali metal salt of a chlorate and hydrogen peroxide to a process water of a cooling system, the process water comprising the bacteria;
- increasing a concentration of the composition in the process water from about 0 ppm up to about 300 ppm in about 1 minute to about 100 minutes;
- measuring a first sulfate concentration in the process water at a position at or near a bottom of a cooling tower basin;
- measuring a second sulfate concentration in the process water at a position at or near a surface of the process water;
- calculating a sulfate concentration difference between the first sulfate concentration and the second sulfate concentration;
- and
- adding the composition to the process water when the sulfate concentration difference reaches a predetermined value.
A method of reducing activity of a bacteria, comprising:
- adding a composition comprising an alkali metal salt of a chlorite and/or an alkali metal salt of a chlorate and hydrogen peroxide to a process water of a cooling system, the process water comprising the bacteria;
- increasing a concentration of the composition in the process water from about 0 ppm up to about 300 ppm in about 1 minute to about 100 minutes;
- measuring a first nitrite and/or nitrate concentration in the process water at a position at or near a bottom of a cooling tower basin;
- measuring a second nitrite and/or nitrate concentration in the process water at a position at or near a surface of the process water;
- calculating a nitrite and/or nitrate concentration difference between the first nitrite and/or nitrate concentration and the second nitrite and/or nitrate concentration;
- and
- adding the composition to the process water when the nitrite and/or nitrate concentration difference reaches a predetermined value.
Dependencies are inferred from the claim text.