Anion Exchange Water Treatment Systems

What is anion exchange.

Anion exchange water treatment systems. This is a long and detailed video tour of a municipal water treatment system installed by king process culligan nl that removes colour and dissolved org. Where should the anion exchange unit be installed. In addition an ion exchanger is often placed in a closed loop. This means that the slightly polluted demineralised water after it has been used in the production process is directed back through the ion exchanger to demineralise it again.

Ion exchange ix systems are used across a variety of industries for water softening purification and separation purposes. Ion exchange water treatment works by removing material from the water through the use of water processes such as water softening systems and water deionization systems. Ion exchange is used in water treatment and also provides a method of separation in many non water processes. An ion exchange system is what makes it possible to remove contaminants containing ions by way of a chemical physical action designed to exchange unwanted ions for beneficial or harmless ions.

As for water deionization systems the cations are exchanged for hydrogen ions while the anions are exchanged for hydroxyl ions. When it comes to water softeners magnesium and calcium ions are replaced by sodium ions. Anion exchange devices can treat either point of entry or point of use. It has special utility in chemical synthesis medical research food processing mining agriculture and a variety of other areas.

Two bed demineralizers have two vessels the first containing cation resin followed by a separate vessel containing anion resin. The type of resin used determines the specific types of ions that are exchanged. An ion exchanger can be used to produce demineralised water based on fresh water. A demineralizer may contain an intimate mixture of both cation exchange resins and anion exchange resins and is called a mixed bed.

Point of use units are connected to a single tap and remove hazardous chemicals from drinking and cooking water only. With an aging ozone treatment system in need of replacement at water treatment plant 8 palm beach county s water utilities department selected globaltech to design a new anion exchange aix system that would work in conjunction with the plant s existing 10 mgd fixed bed aix system. They reduce the concentration of sulfate nitrate and arsenic in water. With anion exchange water passes through a resin bed which removes arsenic by exchanging it for a non toxic substance attached to the bed.

The utility of ion exchange rests with the ability to use and reuse the ion. Ion exchange is the reversible interchange of ions between a solid ion exchange material and a liquid in which there is no permanent change in the structure of the solid. While the chemistry of individual ion exchange reactions varies from one application to the next ix is a treatment process where dissolved ions are replaced by other more desirable ions of a similar electrical charge. When a reaction like this happens it is usually done by way of a resin that is specially made for this purpose.

The major advantage of this closed loop solution is that considerable amounts of water can be saved. Once the space on the resin bed is full the system backwashes with brine to regenerate the bed.