Anionite media for removal of nitrates, nitrites, organics

About the media

Anionite media for removal of nitrates, nitrites and organic impurities is an ion-exchange resin. It is the perfect solution for those, who want to to filter water from organics, nitrates and nitrites. It also removes yellowish water color which is caused by organics. The balls of this resin are carefully designed to selectively remove certain ions from the water by anion exchange principle. Due to its reliability and effectiveness, Lewatit's ion exchange media is a world leader in improving water quality in domestic and industrial facilities.

Operating principle

Anion exchange is a chemical process that uses resin beads to remove negatively charged ions (in this case anions) from the incoming water. Think of these resin spheres as tiny sponges with specific areas that are designed to attract and hold organics, nitrites and nitrates. When the resin spheres come into contact with the incoming water, which contains other anions such as sulphates, nitrates or nitrites, the properties of the resin attract these anions and cause the spheres to swap places. In effect, the resin releases into the water the ions it held (in this case chloride) and attracts the anions (e.g. sulphates, nitrites, nitrates, organics) that were in the water to itself. This exchange process effectively cleanses the water of unwanted anions, leaving it perfectly purified. This method is commonly used in various industries, including water treatment, to remove harmful ions and purify water.

Use

During backwash operation in the filter, the resin layer is expanded by 50-70 % of its volume for at least 10-15 minutes. During this time, the media is 'loosened' to ensure better absorption of the salt solution during the regeneration. In rare cases, the entire volume of aggregate (25 l) is required. In most cases, it is sufficient to add 5-7 litres of this media to your existing water filter to ensure that the anionite is able to remove nitrates, nitrites and organics from the water. Then, after the looseing process (backwash) comes the most important part operation - salt pumping. The concentrated salt solution is dripped onto the media. As the solution flows through the media, it "releases" the organic matter and nitrates it has accumulated and discharges them into the sewer. During the remaining operations, the aggregate is being prepared to filter the same ammount of organics nitrites and nitrates for further use with no trace of salt. It is important to note that salt does not enter the system and you will not feel any trace of it. During the regeneration process, American filters supply water by opening the inner bypass line (Chinese filters often completely shut off the water and leave no water in the house) to prevent salt from entering the system.

Benefits

"Lewatit's ion exchange media offers a wide range of benefits, making them the choice for a wide range of cleaning applications. One of the most important advantages is the high selectivity, which allows the precise removal of specific ions from the water, thus ensuring its exceptional purity. Unclean, yellowish water gives many people an unhygienic feeling when using water. This anionite media solves this colour problem by turning the water into pure colourless water! The anionite also removes nitrates and nitrites from the water, which children under 18 and pregnant women should not have in their water at all. However, like all medias, anionite for the filters to remove nitrates, nitrites and organics has some drawbacks that needs to be considered. One important disadvantage is the possible contamination of the resins, whereby over time the collected materials build up on the surface of the resins, reducing the effectiveness of the filler until it eventually becomes ineffective and needs to be replaced/refilled. Usually, the media remains fully effective for about 5 years, but this depends on the initial water contamination and water consumption.