On a house of 500m2 living space, an extension project for 2 swimming pools fed by a source is planned. Is reverse osmosis treatment a possible solution in this case?
The regulations in force describe the types and quality of the water which must/can fill the pool(s) of public, private, large, smaller capacity, natural swimming(s) ... see www.legifrance.gouv.fr
The water supply to the ponds must be "of good quality".
The regulations in France do not require water to be treated with reverse osmosis, which would produce water that is certainly very clear, purified, most certainly free of bacteria, but which would also be "demineralised".
As a reminder: Filtration objectives according to the decreasing dimensional range from the largest particles to the smallest and to the molecules in solution:
-filtration (retention with an efficiency > 50% or even 99% of particles larger than about 50 micrometers) (various technologies and implementations exist)
-microfiltration (retention with an efficiency > 50% or even 99% of particles larger than about 0.1 micrometer) (various technologies and implementations exist)
-ultrafiltration (retention with an efficiency > 50% or even 99% of particles larger than 0.01 micrometer or about 10 nonameters or molecules with a molar mass of more than 1000 g/mole) (various technologies and implementations exist)
-nanofiltration (retention with an efficiency > 50% or even 99% of all particles and molecules with a molar mass of more than 100-200 g/mole) (various technologies and implementations exist)
- reverse osmosis (retention with an efficiency > 50% or even 99% of all molecules, even the smallest ones, with a molar mass of less than 100 g/mole, example NaCL salt) (various technologies and implementations exist)
Using reverse osmosis : it is therefore choosing the technique that has the best retention performance . This choice must therefore be dictated by a need (according to the initial quality of the water which would contain undesirable dissolved molecules) and/or by risk management (prevent the retention of dissolved molecules that may be encountered) with regard to this purification " very advanced" or "advanced" (more than conventional technologies for this field).
For more information: Institute of Filtration and Separation Techniques ifts@ifts-sls.com
Hello, indeed if your swimming pools welcome the public beware the processes implemented must be approved. With regard to osmosis, implemented after ultrafiltration and therefore a very fine filtration beforehand, it eliminates all the dissolved undesirable substances. But beware, it is absolutely necessary to remineralize the water afterwards to restore it to the calcocarbonic balance, its yield is low (you lose a lot of water in backwashing) and its cost is ultimately high. You use spring water, have you had it analyzed? If yes, what anomalies were detected? Small detail too, check also that the manufacturers of the swimming pool equipment (pumps, filters, ...) agree to guarantee them with water not coming from the water service (rarely the case because too many risks linked to ferrous iron , calcocarbonic imbalance, chlorides, etc.). And for a public swimming pool, the ARS must authorize the water resource.
Ultrafiltration is already very good in the pool, and less restrictive.
We have already carried out this operation in a private swimming pool and it is clearly verified that the stability of the water is much easier to maintain than without RO.
Here is a picture of the system used. An FCA 50 vaec ultraprefiltration NanoARG and reverse osmosis 500L/H from Hydrobios from borehole water.
On the technical aspect, everything depends on the quality of the water but there are also other treatment techniques such as ozonation. Do not hesitate to contact me at +34 684 413 626
hello, I bought a house with 500m2 of living space, a swimming pool extension project (2) planned; powered by a source; I wonder if reverse osmosis treatment is a solution in my case
