Abstract: A method for applying a chemical treatment to a cooling medium in an evaporative cooling system. The method includes applying the chemical treatment to the cooling medium, and the chemical treatment includes at least one of a phosphonate and a dispersant polymer.

Abstract: Methods and systems are described for evaluating the level of organic contaminants in water, and in particular water that is used as boiler feedwater in food processing facilities such as sugar factories. The method includes measuring at least one parameter of the water including pH, conductivity, and/or total organic carbon, and, based on the measured values, determining whether corrective action needs to be taken to reduce the levels of organic contaminants.

Abstract: A porous matrix substrate that has chlorite reactant distributed therein can be used to produce gaseous chlorine dioxide. Ozone-containing gas can pass through the porous matrix substrate and the ozone can react with the chlorite to produce chlorine dioxide.

Abstract: Methods and systems are described for quantifying peroxyacid in a fluid by using spectrophotometry. Peroxyacid in the fluid is reacted with an iodide reagent and the absorbance of the reaction solution is measured. The absorbance can be measured at or near the isosbectic wavelength of iodine and triiodide, and the assay is useful to quantify peroxyacid that is present at high levels in fluids.

Abstract: Methods and systems are disclosed for analyzing and treating a fluid containing a peroxyacid and/or peroxide. A method of analyzing the fluid includes introducing into the fluid a decomposition agent that catalyzes decomposition of the peroxyacid and/or peroxide into decomposition products including oxygen, then directly or indirectly measuring an amount of oxygen produced after introduction of the decomposition agent, and determining an amount of the peroxyacid and/or peroxide present in the fluid. The amount of peroxyacid and/or peroxide in the fluid can also be monitored and controlled by further adjusting the amount of the peroxyacid and/or peroxide in the fluid based on the determined amount thereof. A system for performing the methods includes a decomposition agent infusion device for introducing the decomposition agent into a fluid sample, and a sensor for directly or indirectly measuring an amount of oxygen produced after introduction of the decomposition agent.

Abstract: Devices and methods for sterilizing and/or disinfecting workpieces, such as medical and dental instruments. The device can include a chamber that receives the workpieces and can be sealed. The chamber is filled with chlorine dioxide gas to a threshold concentration and for a time sufficient to sterilize and/or disinfect the workpieces.

Abstract: Methods and systems for producing high purity gaseous chlorine dioxide are provided. A solid chlorite reactant is contacted with an ozone-containing reactant gas, or a gas containing both ozone and a component that reacts with any hydroxide byproduct (such as carbon dioxide), to produce chlorine dioxide. The reaction can be monitored and controlled to ensure that excess chlorite reactant is provided and to prevent ozone from passing into the product gas.

Abstract: Systems and methods are provided for measuring the amount of cationic organic water treatment additives in water systems. Disclosed systems and methods monitor, analyze and control the amounts of cationic organic water treatment additive supplied to the water. Disclosed systems and methods may include various dyes and surfactants for facilitating the monitoring and control of the cationic organic water treatment additives.

Abstract: Devices and methods for sterilizing and/or disinfecting workpieces, such as medical and dental instruments. The device can include a chamber that receives the workpieces and can be sealed. The chamber is filled with chlorine dioxide gas to a threshold concentration and for a time sufficient to sterilize and/or disinfect the workpieces.

Abstract: Methods and systems are disclosed for analyzing and treating a fluid containing a peroxyacid and/or peroxide. A method of analyzing the fluid includes introducing into the fluid a decomposition agent that catalyzes decomposition of the peroxyacid and/or peroxide into decomposition products including oxygen, then directly or indirectly measuring an amount of oxygen produced after introduction of the decomposition agent, and determining an amount of the peroxyacid and/or peroxide present in the fluid. The amount of peroxyacid and/or peroxide in the fluid can also be monitored and controlled by further adjusting the amount of the peroxyacid and/or peroxide in the fluid based on the determined amount thereof. A system for performing the methods includes a decomposition agent infusion device for introducing the decomposition agent into a fluid sample, and a sensor for directly or indirectly measuring an amount of oxygen produced after introduction of the decomposition agent.

Abstract: Methods and systems for producing high purity gaseous chlorine dioxide are provided. A solid chlorite reactant is contacted with an ozone-containing reactant gas, or a gas containing both ozone and a component that reacts with any hydroxide byproduct (such as carbon dioxide), to produce chlorine dioxide. The reaction can be monitored and controlled to ensure that excess chlorite reactant is provided and to prevent ozone from passing into the product gas.

Abstract: Systems and methods are provided for measuring the amount of cationic organic water treatment additives in water systems. Disclosed systems and methods monitor, analyze and control the amounts of cationic organic water treatment additive supplied to the water. Disclosed systems and methods may include various dyes and surfactants for facilitating the monitoring and control of the cationic organic water treatment additives.