Abstract: A device is provided for preparing a chemical solution. The device comprises a dissolving bowl having an open top portion for receiving a solid chemical material and a closed bottom portion. A grid member is disposed between the top and bottom portions for supporting the chemical material on a top surface thereof defining an array of grid openings and a flow opening distinct therefrom. A nozzle is positioned proximate the bottom portion and directs flow of an aqueous fluid to contact and dissolve at least some of the chemical material and create a chemical solution thereof ?n insert disposed proximate the grid member impedes flow of the aqueous fluid through one or more of the grid openings to increase fluid turbulence within the dissolving bowl and/or redirects the fluid flowing from the flow opening to flow in one or more directions over the grid member.

Abstract: The present invention provides calcium hypochlorite compositions that dissolve in approximately one week, while displaying both favorable reactivity properties and dissolution characteristics for recreation water treatment. The present invention benefits from the discovery that the dissolution profile of calcium hypochlorite compositions can be altered by providing compositions within a critical density range, for example when provided in the form of a tablet.

Abstract: Chemical dispensers are provided that include a hollow body member including a bottom end configured to be disposed below a waterline and a top end configured to be disposed above the waterline. The hollow body member defines an interior space disposed between the bottom end and the top end that is configured to accept, through the top end, and hold therein a dissolvable chemical. The dispenser includes a buoyancy member surrounding the hollow body member and configured to provide buoyancy to the dispenser when placed in a body of water such that a first portion of the interior space remains above the waterline and a second portion of the interior space submerges below the waterline. An opening in the hollow body member allows sufficient water flow into the interior space below the waterline such that dissolution or partial dissolution of the dissolvable chemical below the waterline occurs.

Abstract: The present disclosure relates to an amperometric sensor for measuring free chlorine, which sensor comprises: an elongate body with a tip, wherein the circumferential surface of the body constitutes a counter electrode; a reference electrode having a silver/silverchloride electrode surface arranged on the tip of the elongate body; and a working electrode having a gold electrode surface arranged on the tip of the elongate body wherein the gold electrode surface is composed out of a string of electrically connected, spaced apart surface parts.

Abstract: The invention is an apparatus for preparing a chemical solution. A device of the present invention includes a housing including a lower chamber and an upper chamber and a dissolving bowl arranged at an interface of the lower chamber and upper chamber. The dissolving bowl includes a grid disposed within. Solid, undissolved chemical material rests on a top surface of the grid, such that the grid is able to maintain physical separation of the solid, undissolved chemical material from at least a bottom portion of the dissolving bowl. The device further includes a nozzle disposed within the dissolving bowl and positioned so as to direct flow of aqueous fluid into the dissolving bowl and towards the grid. The dissolving bowl further includes an outlet in fluid communication with the lower chamber to thereby allow for a prepared chemical solution to flow from the dissolving bowl into the lower chamber.

Abstract: The present disclosure is directed to a sanitizing composition for dispensing into aquatic systems. The sanitizing composition contains a sanitizing agent containing water molecules that have been bound within the composition by a water binder. In one embodiment, the sanitizing agent is a polybiguanide salt and the water binder is an anhydrous salt. The resulting composition can be a solid that can be packaged in water degradable or water soluble packages for ease of handling and dispensing.

Abstract: The present disclosure is directed to a method of water treatment. The water is passed through an electrolytic cell which converts available chlorides to hypochlorous acid, hydroxyl radicals, or other oxidizing agents. The acid is used to reduce the chemical oxygen demand (COD), the biochemical oxygen demand (BOD), and/or the ammonia content of the water. In the absence of sufficient available chlorides, the water inlet stream may be dosed with a chloride solution (e.g. brine).

Abstract: The present disclosure is directed to a method of removing pesticides from water. An electrolysis cell oxidizes pesticides and/or other organic components, optionally in conjunction with one or more filtration steps. Hydrogen peroxide may be added to the electrolysis process to aid oxidation.

Abstract: The present invention provides a quaternary ammonium etidronate compound (QAE) comprising a quaternary ammonium cation and an etidronate anion, having the Formula I. A method for the preparation of such compounds is described by reacting a quaternary ammonium salt with an etidronic acid or salt thereof. Variable ratios of each reactant may also be used to form different QAE compounds. The quaternary ammonium etidronate compounds is useful in water treatment, cosmetic, hygiene, personal care, paint, coating, wood treatment, agrochemical, antimicrobial, disinfectant, or biocidal compositions; as the compound provides high anti-corrosive and biocidal properties; and low scaling properties. A water treatment composition is also described, having a QAE compound of Formula I and a water treating biocidal agent, useful in cooling towers and other recirculating water, or recreational water system.

Abstract: A floating chemical dispenser is disclosed that is configured to dispense a chemical into a body of water, such as pool water. The chemical dispenser includes a float attached to a container. The container contains a chemical composition, such as a chlorine source. The container also defines an aperture that allows water to enter the container at a controlled rate. When the dispenser is placed in a body of water, water enters the container and gradually dissolves and releases the chemical. An end cap is position on the container and rotates between a closed position and at least one chemical dispensing position. The end cap further includes a locking device that locks the end cap into a closed position to prevent inadvertent release of the chemical.

Abstract: The present disclosure is directed to a method of removing pesticides from water. An electrolysis cell oxidizes pesticides and/or other organic components, optionally in conjunction with one or more filtration steps. Hydrogen peroxide may be added to the electrolysis process to aid oxidation.

Abstract: A low flow apparatus for creating a solution in water of a solid chemical is provided. Also provided is a cartridge containing a solid chemical which may be placed into the apparatus. Further provided is a method of using the apparatus to create a chemical solution form a solid chemical.