Abstract: Methods and compositions for suppressing corrosion of a corrodible metal surface that contacts a water stream in a water system. The method comprises introducing into the water stream a treatment composition, the treatment composition including a combination of passivators and a hydroxycarboxylic acid promoter.

Abstract: Methods are described that reduce the amount of organic matter in water, including reducing an amount of total organic carbon in water. The method includes adding powder activated carbon to the water; mixing the powder activated carbon in the water; and separating the powder activated carbon from the water. Also described are a method for reducing glycol content in water containing glycols, and a method for reducing glycol content in a steel mill wastewater stream containing glycols.

Abstract: A method for applying a chemical treatment solution to a process stream in an industrial processing system while the system is online. The method includes measuring a mineral hardness and alkalinity of the process stream, determining a dosage of the chemical treatment solution based on a relationship between the dosage and a scale saturation parameter that is calculated based on the mineral hardness and the alkalinity of the process stream, and controlling application of the chemical treatment solution to the process stream based on the determined dosage.

Abstract: Methods and compositions for inhibiting corrosion of a corrodible metal surface that contact a nitrogen-containing solution. The method comprises adding a chemical treatment composition to the nitrogen-containing solution that includes an organic filmer and a passivator. The organic filmer may be a hydroxycarboxylic acid. The chemical treatment composition may further include a surface-active compound.

Abstract: A method for forming a protective antioxidative barrier on the furnace electrodes using a chemically altered cooling liquid containing an antioxidant additive. This method can be applied to electrodes used in electric arc furnaces and ladle metallurgy furnaces. The method can involve spraying the cooling liquid onto the electrode, thereby forming the protective antioxidative barrier and reducing the oxidation of the electrode.

Abstract: The amount of sulfite in water can be determined using fluorescence by adding to the water a fluorophore compound, measuring a fluorescence signal of the water, and determining the amount of the sulfite in the water based on the measured fluorescence signal. This method can be used in a water treatment system in which a sulfite solution is added to treat the water, and the amount of sulfite that is added can be controlled based on the measured fluorescence of the water.

Abstract: Systems and methods for applying a volatized chemical treatment solution to a combustion chamber in a boiler system while the system is online. The method includes measuring a combustion parameter, determining in real time a dosage of the volatized chemical treatment solution based on the measured combustion parameter, and applying the volatized chemical treatment solution to the combustion chamber based on the determined dosage.

Abstract: A method for forming a protective antioxidative barrier on the furnace electrodes using a chemically altered cooling liquid containing an antioxidant additive. This method can be applied to electrodes used in electric arc furnaces and ladle metallurgy furnaces. The method can involve spraying the cooling liquid onto the electrode, thereby forming the protective antioxidative barrier and reducing the oxidation of the electrode.

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 compositions for inhibiting corrosion of a metal product are provided. The metal product can be contacted with water that includes at least one carbonate and/or bicarbonate salt, or otherwise has components that increase the alkalinity of the water. In addition, or as an alternative, the water can include a stannous corrosion inhibitor. The water can be evaporated off of a surface of the metal product to provide a residual of the salt on the surface and/or a protective stannous film on the surface.

Abstract: Methods and compositions for inhibiting corrosion of a corrodible metal surface that contact a nitrogen-containing solution. The method comprises adding a chemical treatment composition to the nitrogen-containing solution that includes an organic filmer and a passivator. The organic filmer may be a hydroxycarboxylic acid. The chemical treatment composition may further include a surface-active compound.

Abstract: The reaction of sodium hypochlorite with sodium bromide is slow, and commonly only part of the bromide is converted to hypobromite. Methods to accelerate the reaction by adding a regulated amount of acid to a solution comprising bleach and bromide are provided, whereby the yield of hypobromite can be increased. The amount of acid added can be predetermined based on the content of a base in the bleach, and acid can be added to neutralize the base. The amount of acid added can be based on a measured parameter of the reaction that is indicative of reaction kinetics. For example, the amount of acid can be actively controlled by measuring pH, absorbance of visible or near Ultraviolet light, or temperature of the reacting solution and adjusting acid.

Abstract: Methods and compositions for inhibiting corrosion of metal surfaces in aggressive fluids, including fluids with high total dissolved solids content. The treatment composition can include a stannous corrosion inhibitor and optionally an additive that enhances the corrosion inhibition properties of the stannous component. The additive may include organic compounds having at least one heteroatom.

Abstract: A method for applying a chemical treatment to a process stream in an ethanol production/corn oil extraction system. The method includes applying the chemical treatment to the process stream before or during fermentation of an emulsified oil precursor product in the process stream to demulsify the emulsified oil precursor product, and extracting the demulsified oil from the emulsified oil precursor product.

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: Methods and systems of controlling odor in. water by adding a humic composition to the water. The humic composition cm adsorb or otherwise neutralize malodorous compounds such as hydrogen sulfide, ammonia, and mercaptans. The methods are useful in food and. agricultural industries where the water may come in contact with food items.

Abstract: A method of treating water to remove selenium and/or mercury that is dissolved in the water. The method includes adding an acid to the water to reduce the pH, adding a metal reagent to the water that is effective to reduce the selenium and/or mercury to a lower oxidation state, and then removing the reduced selenium and/or mercury from the water.

Abstract: Methods for suppressing corrosion of a corrodible stainless steel surface that contacts a water stream in a water system. The method comprises introducing into the water stream a treatment composition, the treatment composition including a Tin(II) corrosion inhibitor and a hydroxycarboxylic acid promoter.