Abstract: Apparatus and method for controlling the resistivity of water. The apparatus includes a diffuser injector for mixing water and a water soluble gas such as carbon dioxide gas and that defines an inlet conduit through which water to be treated is communicated and an output conduit from which treated water is discharged. A diffuser tube is disposed within one of the conduits for injecting carbon dioxide gas into the water. A proportional control valve provides carbon dioxide gas from a carbon dioxide tank to the carbon dioxide diffuser tube. Downstream from the diffuser injector are a static mixer for further intermingling the water and carbon dioxide gas and a serially connected contact chamber for enhancing the stability in the resistivity level of the water. A resistivity monitor measures the resistivity of the water and carbon dioxide mixture and transmits a signal to a controller.

Abstract: A method and apparatus for regenerating an ion exchange resin utilizing recycled solution or reused regeneration solution. At least one tank containing an ion exchange material is provided having a spaced first and second ports which define a fluid flow path through the ion exchange media. Water to be treated is introduced at an inlet and flows through the resin bed ultimately being discharged at the outlet. A polishing zone is located at the outlet which includes highly regenerated, uncontaminated resin. The media is regenerated in a multi-step process in which regeneration solution is introduced into the resin bed in two separate steps. In the first step, a first regeneration solution is introduced into the resin bed upstream from the polishing zone, flows in a countercurrent direction and is discharged through the inlet of the tank. A second regeneration fluid is introduced at the outlet of the tank and flows in a countercurrent direction through the entire resin bed.

Abstract: A method and apparatus for regenerating an ion exchange resin utilizing recycled solution or reused regeneration solution. At least one tank containing an ion exchange material is provided having a spaced first and second ports which define a fluid flow path through the ion exchange media. Water to be treated is introduced at an inlet and flows through the resin bed ultimately being discharged at the outlet. A polishing zone is located at the outlet which includes highly regenerated, uncontaminated resin. The media is regenerated in a multi-step process in which regeneration solution is introduced into the resin bed in two separate steps. In the first step, a first regeneration solution is introduced into the resin bed upstream from the polishing zone, flows in a countercurrent direction and is discharged through the inlet of the tank. A second regeneration fluid is introduced at the outlet of the tank and flows in a countercurrent direction through the entire resin bed.