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Electrolysis is the process that separates elements from a compound using electricity. A low electric voltage is applied between the two electrodes, in such a way that the existing salt in the water is turned into compounds with the ability to oxidise and disinfect at the same time.
The term “electrolysis” comes from two radicals; “electro” which makes reference to “electricity” and “lysis” which means breakage.
It was discovered in 1800 by the chemist William Nicholson. Between 1833 and 1836 the English physicist and chemist Michael Faraday developed electrolysis laws that have his name. Nowadays, Tecnic Cat offers you innovative systems for your complete piece of mind.
The electrode connected to the positive pole is known as an anode and the electrode connected to the negative pole is known as a cathode. Each electrode attracts ions with opposite charge; the negative ions move towards the anode whilst the positive ions move towards the cathode.
The energy necessary to separate ions and increase their concentration in electrodes is provided by the electric power supply.
A transfer of electrons occurs in the electrodes between them and the ions, producing new substances. The negative ions give electrons to the cathode (+) and the positive ions collect electrons from the anode (-).
In short, an oxidization-reduction reaction occurs, in which the electric power supply is responsible for contributing the necessary energy.
– Low costs for transport, storage and management.
– Effective against bacteria, virus and fungi.
– Lasting effect as a result of the action of the disinfectants.
– Low energy consumption
– Respectful with the environment. Salt is natural, common salt.
– No odours or toxic vapours
– It does not cause irritations to eyes or the skin like in swimming pools rich in sub-products (chloramines)
Sodium hypochlorite is used in swimming pools to disinfect the water and for oxidisation. The micro-organisms do not create defences against it. Hypochloric acid is produced by means of the reaction of sodium hydroxide with chlorine gas. The so-called “active chlorine” is formed in the water. There are various ways of using sodium hypochlorite, one of them is caused using electrolysis with the salt in the place where a salt solution is applied (NaCL), in the water. Sodium ions (Na+) and chlorine are produced.
4NaCl 4NA + + 4cl-
By means of the transfer of a salt solution in electrolysis cells the reactions that take place in the electrodes are as follows:
2Cl- Cl2 + 2e-2H2O + 2e- H2 + 20H-
2h20 O2 + 4H + + 4e-
Subsequently, chlorine and hydroxide react to form hypochlorite:
OH-+ Cl2 HOCl + Cl-
The amount of organic pollutants (urine, sweat, cosmetics) determines the required concentration of sodium hypochlorite. It is better to filter the water before applying the sodium hypochlorite, as fewer products will be needed.
The production reactions of other types of very energetic oxidants like ozone and free radicals take place in a lower percentage producing a synergy of oxidation/disinfection.
The replacements of salt will be caused as a result of the losses of the beaker from its own use; mainly due to washing the filter and flushing the system.
With respect to the salt content in the bath water, the administering is not restrictive. The directive allows a maximum increase in conductivity with respect to the water intake of 1 mS/cm, which takes as a reference the initial water by applying its salt concentration (4-6 g / l).