MB Plant - Mixed Bed Plant

A “MB Plant” or “Mixed Bed Plant” in water treatment refers to a water purification system that utilizes a mix of ion exchange resins to produce high-purity water. It is commonly use to further enhance the quality of demineralize water produce by a demineralization plant (DM plant) or other water treatment processes.

System Components

Mixed Bed Unit: The mixed bed unit contains a mixture of cation exchange resin and anion exchange resin. The cation exchange resin has a negative charge and attracts and removes positively charge ions (cations), while the anion exchange resin has a positive charge and attracts and removes negatively charge ions (anions). The mix bed unit is design to achieve high purity by removing any remaining traces of ions in the water.
Regeneration: Similar to the cation and anion exchange units in a DM plant, the mix bed resins will become exhaust over time and require regeneration to restore their capacity. The regeneration process involves passing regenerant chemicals, such as hydrochloric acid (HCl) and sodium hydroxide (NaOH), through the mix bed unit to remove the adsorb ions and regenerate the resin.
Polishing Treatment: In some cases, additional polishing treatment steps may be included after the mix unit to further enhance water quality. These may involve processes such as activate carbon filtration, ultrafiltration, or reverse osmosis to remove any residual impurities and achieve the desire level of water purity.

Significance & Advantages

The output of a Mix Plant is typically ultra-pure water with very low levels of dissolve minerals and salts. This highly purifie water is often use in applications where strict water quality requirements exist, such as in power plants, pharmaceutical manufacturing, electronics industries, and laboratory research.

Regular maintenance, including resin regeneration, monitoring of water quality, and occasional resin replacement, is necessary to ensure the continue performance and efficiency of a Mix Plant.