What is salt chlorination?

Most of us love to enjoy the summer by taking a bath in a pool, however, we must be very careful when maintaining one since it is a container that stores large amounts of water for a long time, it tends to accumulate many bacteria and germs which can be harmful to health. When we think about carrying out a process of disinfection and purification of the water in a swimming pool, the first chemicals that appear in our mind are chlorine and bromine, powerful substances at the time of cleaning and sanitizing due to their disinfectant properties but which must be manipulated with so much care as they can be abrasive and dangerous for the human being.

For this reason, alternative methods for water cleaning that do not require these types of products have been developed. Among the most common currently used, we have salt chlorination. This is a well-liked system among the population nowadays as it is highly effective, its cost is low and accessible and, in addition, it could be automated. Saline chlorination is a method by which sodium chloride, or salt, is added to the pool water which passes through channels composed of titanium that will separate the chlorine from the sodium present in the salt through a continuous electrical current, called electrolysis, which will allow the sterilization of water. After disinfecting the water, the chlorine combines again with the sodium, creating salt again and the possibility of the cycle repeating indefinitely, and this will leave us with a permanent disinfection system.

Since the water with which the pools are filled is usually fresh, the salt must be added, for which it is recommended to add 35 grams of salt per liter of water. This combination will pass through the chlorinator and generate sodium hypochlorite, a substance that mixed with water turns out to be a powerful disinfectant for aqueous solutions. This leaves us with a type of free chlorine that does not degrade, contrary to that of chlorine tablets or commercial liquid chlorine, so you will not have to carry out the process frequently.

Although this process generates a type of free chlorine that does not degrade, it is recommended to add a chlorine stabilizer as well, since UV rays can alter its level, in addition, depending on the exposure to the sun, water can evaporate but the amount of salt would be maintained and this could generate much more chlorine than necessary compared to the volume of water that the pool has. In these cases, the most common advice is to use cyanuric acid.

It is also important to install water chlorinators that have built-in pH regulators, bearing in mind that the acidity and alkalinity level of the water directly influences the disinfection process and the quantities of chemicals to be used may vary accordingly. In addition, it is recommended to regulate the temperature of the pool water, for which there are different types of heaters and thus, in this way, help to potentiate the effects of germicides.

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