E-Cell is a high-tech enterprise specializing in the development and production of EDI stacks.
For many years, operators of pure water production systems have been seeking a technology to replace mixed-bed ion exchange for final demineralization. The operating costs, as well as the complexity and risks associated with acid and caustic regeneration, were sources of frustration for these operators. EDI has established itself as an innovative alternative by reducing operating costs, improving site environmental, health, and safety risk profiles, and producing a continuous, steady supply of pure and ultrapure water.
Production of pure water has evolved from conventional pretreatment with multiple stages of ion exchange in initial and final demineralization to the following membrane-based operations, including EDI, that are now considered to be best practice by many customers around the world:
EDI utilizes both traditional ion-exchange resins and ion-exchange membranes to remove contaminants, including uncharged or lightly charged species in the feed water, such as silica and boron. The biggest advantage is that EDI technology uses direct current to drive contaminants out of the feed water and through the ion-exchange membranes into the concentrate channels.
Direct current also splits water into hydrogen and hydroxyl ions, which act as continuous regenerating agents, preventing contaminants from accumulating on the ion-exchange resin. Therefore, EDI can continuously and predictably produce high-purity and ultrapure water with quality equal to or better than that of mixed-bed ion exchange.