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The process involves water entering through the top, flowing through a resin bed where ionic contaminants are exchanged for H and OH ions, and exiting through the bottom. When capacity is exhausted, regeneration involves backwashing, separating resins, introducing caustic and acid, rinsing, and remixing the resins with air.
When the resin’s capacity is exhausted, regeneration begins. The resin is backwashed, and the cation and anion resins are separated based on their densities. Caustic sodium hydroxide and acid are introduced separately to regenerate the resins. After regeneration, a slow rinse displaces the regenerate chemicals, and the resins are re-mixed with air before the unit is returned to service.
Mix Bed Plants are designed to be water and chemical-efficient, reducing operating costs and providing a sustainable solution. They can be supplied as pre-engineered plants or customized to specific requirements. Additionally, non-regenerable mixed bed polishers offer a cost-effective solution for final polishing steps, with off-site resin regeneration options to eliminate the need for on-site chemical handling.
They can be internally or externally regenerated, with options for off-site resin regeneration to eliminate on-site chemical handling. Mixed bed plants combine cation and anion resins in a single vessel, offering higher water quality than two-bed systems, and can further treat water already processed by reverse osmosis.