Abstract: Methods and systems for the controlled production of aqueous halogen solutions with varying compositions are disclosed. According to an embodiment, aqueous solutions of hypochlorite ions are modified through the sequential addition of pH adjusting chemicals, non-chloride halide ions, and halogen stabilizing compounds. Sensors, for measuring physical and chemical properties of the solutions as they change due to the impact of the various chemical reactions, are linked to a control system which, in turn, can control the input of one or more chemicals. The control system facilitates the production of a solution with desired characteristics in terms of pH, specific halogen composition, degree of halogen stabilization, and limiting the production of undesired by products such as bromate ions.

Abstract: Provided are systems and methods for controlling the production of chlorate in electrolytic cells. The methods can produce a hypochlorite-containing solution having a chlorate to free available chlorine ratio of less than 0.1 by contacting a flow of a chloride-containing brine to an aqueous feed stream so as to give rise to an admixture. The disclosed technology also includes modulating at least one of the flow rate of the chloride-containing brine and the chloride concentration of the chloride-containing brine so as produce the hypochlorite-containing product solution.

Abstract: Methods and apparatuses for the direct electrochemical generation of high concentration, stable aqueous solutions comprised of mixtures of free halogen species, N-halosulfamate compounds, N-halosulfonamide, and other compounds for biocidal applications is disclosed. Solutions containing the desired content of these species, with the desired concentration and pH value, is achieved through the electrolysis of aqueous brines containing mixtures of metal halide compounds, sulfamic acid, and other additives as desired. Controlling the relative compositions of the brines used to prepare the desired biocidal solutions, as well as the electrolysis conditions, can produce the biocidal solution with the desired composition and properties.

Abstract: Method and apparatus for destroying organic contaminants in a fluid. At least one oxidant is added to a contaminated fluid, which is then irradiated with ultraviolet radiation. The oxidant is preferably chlorine-based and generated on-site. The intensity of the radiation is higher than typical AOP processes. Various process parameters, such as the pH and/or flow rate of the contaminated fluid, and/or the relative intensities of various UV wavelength sources, are varied in response to measuring quality indicators.

Abstract: Methods and apparatuses for the direct electrochemical generation of high concentration, stable aqueous solutions comprised of mixtures of free halogen species, N-halosulfamate compounds, N-halosulfonamide, and other compounds for biocidal applications is disclosed. Solutions containing the desired content of these species, with the desired concentration and pH value, is achieved through the electrolysis of aqueous brines containing mixtures of metal halide compounds, sulfamic acid, and other additives as desired. Controlling the relative compositions of the brines used to prepare the desired biocidal solutions, as well as the electrolysis conditions, can produce the biocidal solution with the desired composition and properties.

Abstract: Method and apparatus for destroying organic contaminants in a fluid. At least one oxidant is added to a contaminated fluid, which is then irradiated with ultraviolet radiation. The oxidant is preferably chlorine-based and generated on-site. The intensity of the radiation is higher than typical AOP processes. Various process parameters, such as the pH and/or flow rate of the contaminated fluid, and/or the relative intensities of various UV wavelength sources, are varied in response to measuring quality indicators.

Abstract: Method and apparatus for electrochemical generation of quaternary ammonium hypohalite salts, which may be combined with the capabilities of free chlorine to form a novel biocidal system. An aqueous solution preferably comprising dissolved quaternary ammonium halide salts is electrolyzed, which converts the halide component of the quaternary ammonium salt to the corresponding halogen. The halogen dissolves in the aqueous solution producing hypohalous acid and hypohalite anion. A combination of one or more quaternary ammonium compounds and a halide salt, surfactant, and/or germicide may be electrolyzed. The solution may be incorporated into a delivery system for example, a spray bottle or hand sanitizer, or as part of a dispensing system whereby quaternary ammonium halide salts absorbed onto wipes can be dispensed as quaternary ammonium hypohalite salts.