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26.10.2007 : NEW SYSTEM uvscenic: Ultraviolet and Low salinity electrolysis

The traditional water treatments in pools consist, fundamentally, in adding chlorine in any of its commercial forms available.

SALINE ELECTROLYSIS SYSTEMS contributes a new concept for the treatment of your pool, improving the quality of the water, avoiding the handling of chemical products and simplifying in great measure the maintenance tasks. Saline electrolysis systems generate chlorine from the common salt dissolved in the water. The necessary salt for their operation should be added to the pool in a concentration of 4-6 Kg/m3 (5-6 inferior to sea water). When we circulate a continuous electrical current through a salt dissolution, over a surface of non soluble electrodes (titanium+nobel metals) the following electrochemical reactions are produced in the electrolysis cell: Salt is added to the water and in the anode of the electrolyte cell chlorine (Cl2) is produced by means of the following electrolysis reaction:

2NaCl+2H2O=2NaOH+H2+Cl2
(salt+water= soda+hydrogen + chlorine)

This chlorine is disolved in the water forming hypochlorous acid:

Cl2+H2O=HOCl+HCl
(chlorine + water = hypochlorous acid+ hydrochloric acid)

Hypochlorous acid oxidizes the bacteria. Also one may observe that active oxygen (O2) is generated which adds an extra disinfectant strength to the process, therefore sterilizing the water:

2HOCl=2HCl+O2
(hypochlorous acid= hydrochloric acid + Oxigen)

Once the water is disinfected, the hydrochloric acid reacts with the soda in a neutralization reaction, giving once again salt and water. The hydrogen and oxygen react forming water:

NaOH+HCl=NaCl+H2O
(Soda + hydrochloric acid = salt + water)

As you can see, it is a complete process in which not one product is lost. The addition of salt should only be done when filling the pool. Only small amounts should be replaced periodically due to the loss of serviceable water during filter washings.

Water treatment by electrolysis is a closed system in which there is not loss of salt. The chlorine generated destroys the organic matter and pathogens present in the water, being transformed again in sodium chloride (common salt).

The products break down, they act and they are regenerated again. This explains that the concentration of salt remains constant.