Process of using demineralized water for chlorate reduction in on-site brine electrochlorination systems

An electrochlorination system comprising:

• a water conditioning system fluidly connectable to a source of water, the water conditioning system configured to remove at least a portion of anions and cations from the water to produce demineralized water;
• a blending vessel fluidly connectable downstream from an outlet of the water conditioning system, the blending vessel including an inlet fluidly connectable to a source of sodium chloride and a brine solution outlet, the blending vessel configured to mix sodium chloride from the source of sodium chloride and the demineralized water to produce brine solution;
• an electrolyzer having an inlet fluidly connectable with the brine solution outlet and configured to receive the brine solution;
• a controller configured to regulate power from a power source delivered power to the electrolyzer at a current sufficient to generate a sodium hypochlorite solution having a chlorate concentration of less than about 0.25 mg/L;
• and
• a shut off valve downstream of the electrolyzer, the controller further configured to close the shut off valve responsive to a level of chlorate in the sodium hypochlorite solution being above a specified limit.

A method of modifying an electrochlorination system having an electrolyzer fluidly connected to a source of brine solution, the method comprising:

• providing a water conditioning system configured to remove a portion of anions and cations from water from a source of water and produce demineralized water;
• providing a controller configured to communicate with the electrochlorination system and configured to cause the electrochlorination system to mix the demineralized water with the brine solution, and to operate the electrolyzer under conditions sufficient to generate a sodium hypochlorite solution having a concentration of chlorate of less than 0.25 mg/L;
• providing a shut off valve to be installed downstream of the electrolyzer;
• and
• programming the controller to control the shut off valve responsive to a level of chlorate in the sodium hypochlorite solution.