Best Methods to Remove Permanent Hardness of Water

Methods to Remove Permanent Hardness of

In this article, we’ll look at Methods to remove Permanent hardness of Water so that it will use for various residential and commercial purposes. Our everyday lives depend on water, but the quality of that water can vary greatly. Hardness is a typical problem that develops when the water has excessive dissolved minerals, especially calcium, and magnesium. Permanent and temporary water hardness are the two categories, with permanent hardness being more challenging to remove.

Methods to Remove Permanent Hardness of Water

Ion Exchange:

Permanent hardness is often fought using ion exchange. The use of a resin bed containing sodium ions will include. Calcium and magnesium ions will be switched out for sodium ions, as the hardness of the water will reduce as it travels through the resin. This procedure successfully softens the water, making it appropriate for daily usage. It is crucial to remember that in order to refill the sodium ions, the resin bed needs to be periodically regenerated with salt.

Lime-Soda Process:

Methods to Remove Permanent Hardness of Water, Permanent hardness will eliminate chemically using the lime-soda technique. This procedure involves the reaction of calcium and magnesium ions in hard water with lime (calcium hydroxide) and soda ash (sodium carbonate) to produce insoluble precipitates. The softened water is then produced by removing these precipitates via sedimentation or filtration. Large-scale water treatment, like that required for municipal water supplies, frequently uses the lime-soda method.

Reverse Osmosis:

Reverse osmosis (RO) is a very efficient technique for purifying water of additional contaminants in addition to persistent hardness. Water is forced through a semipermeable membrane throughout the process, which permits only water molecules to pass while rejecting impurities and dissolved minerals. Water hardness can be greatly reduced using RO systems, resulting in high-quality, softened water fit for a variety of uses. It is crucial to keep in mind, though, that RO systems can be expensive and could need routine upkeep.


The historic distillation method will remove water impurities and hardness. It includes heating water to a boil in order to create steam, which is then condensed back into liquid form, condensing the dissolved minerals in the process. Permanent and temporary hardness is successfully eliminated by distillation, producing clear, softened water. It is important to note, though, that distillation can be an energy-intensive process and might not be appropriate for large-scale applications because of how slowly it operates.


Chelation is a chemical process in which hard water is supplemented with chelating compounds. Chelating substances, such as a substance called ethylenediaminetetraacetic acid (EDTA), combine with calcium and magnesium ions to create complexes that stop them from hardening the material. These compounds are still soluble and easy to filter out. Due to the high cost and the need for ongoing dosage of the chelating chemicals, chelation is frequently used as a temporary fix for water hardness.

The hardness of water is brought on by the presence of calcium or magnesium salts in the water.

Temporary Hardness: It only comprises calcium and magnesium bicarbonate salts. Boiling can get rid of it, For Example:

Permanent Hardness – It contains calcium and magnesium chloride and sulphate salts. Boiling does not remove it. For instance.


Methods to remove permanent hardness of water can be a difficult problem to solve, but the correct approaches will be used to do so. Reverse osmosis, the lime-soda method, distillation, chelation, and ion exchange are all effective Methods to Remove Permanent Hardness of Water. Numerous factors, including the breadth of the application, available resources, and required water quality, have an impact on the method of approach selection. By putting these strategies into practice, we can guarantee that clean, softened water is available for a variety of uses, enhancing our quality of life as a whole.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top