WHAT IS DM WATER
Demineralized water is water that has been treated to eliminate the majority of its mineral and salt ions. Calcium, chloride, sulphate, magnesium, and sodium are just few examples. Demineralized water is often referred to as deionized water or demi- water. Demineralized water differs from distilled water in several ways. Boiling and re-condensing distilled water purifies it. Salt ions are eliminated in this manner.
Demineralised water is produced via three main routes:
- 1. Positive ions are replaced by hydrogen ions, and negative ions are replaced by hydroxide ions in an ion-exchange process employing ion exchange resins.
- 2. An ion-exchange procedure is also carried out using Electro-Deionisation- To keep the resins regenerated, an electric current is passed through them.
- 3. Membrane filtration: This is done in several steps most of the time. Several phases of demineralization are required to get the desired demi-water quality. The advantage of using membrane filtering in this scenario is that no chemicals are used in the production of demi-water.
Health Risks of Demineralized water
You'd expect that demineralized water, which has been totally filtered of minerals through (electro) ion-exchange, distillation, membrane filtering, or other processes, might be used as drinking water. However, there are benefits and drawbacks to drinking demineralized water, as with everything else. The benefit is that the minerals that are harmful to our health have been removed. There is a lot of evidence about the negative effects of specific minerals on our bodies.
Working of DM water portable plants
As previously stated, demineralization is the removal of dissolved mineral solids. But, before we delve into the mechanics of demineralization, let's review the basic fundamentals
Minerals and salts dissociate into the constituent ions in the presence of water. These dissolved solids are made up of anions (negatively charged ions) and cations (positively charged ions), both of which are attracted to counterions (or ions of an opposing charge).
The functional groups loosely retain ions with opposing charges. Water containing dissolved ions is added to the resins. Even as the resultant solution is drained away, the ions in solution will trade places with the ions on the resin beads, clinging to the resin's functional groups. When one ion has a stronger affinity for the functional group than the one already present, the reaction occurs.
The presence of certain ionic pollutants will determine whether anionic or cationic resins are required. Demineralization utilizes both cations, sometimes even in the same column or bed. Following demineralization, the treated water will be of a high level of purity compared to distilled water, but typically at a much lower cost.