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Author: Subject: Southern Baja area: Water Filtration
Reeljob
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[*] posted on 9-15-2012 at 07:26 AM


Have used a "Waterfixer" on several boats to clean the dock water before putting in the fresh water tank. Never a problem.

Just couple weeks ago saw a `135' mega in Cabo that had a Water Fixer connected between the dock water and the boat.
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RnR
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[*] posted on 9-15-2012 at 08:06 AM


Quote:
Originally posted by Marinero
What is the objection to R/O? If mounted near the pila the excess water can be returned with little or no loss. The R/O water is sent to point of use by small hoses after visiting an accumulator tank.


This scenario would APPEAR to work, for a while......

Reverse Osmosis, RO, works by using pressure to extract pure water from the feed water. The feed water has a certain amount of dissolved solids in it when it enters the RO treatment chamber. The pressure on the feed water forces pure water molecules through the RO membrane while the dissolved solids are retained on the feed water side of the membrane. As the pure water leaves the feed water, the concentration of the dissolved solids increases in the remaining feed water. As the concentration in the feed water rises, equilibrium is reached which the system operating pressure and no more pure water will pass through the membrane.

The only solution is to increase the pressure or reduce the concentration of the dissolved solids on the feed water side. This is where the waste water comes into play. Flushing and replacing the high concentration feed water from the RO chamber with new, low concentration, feed water allows the process to resume.

So, simply returning the waste stream to the pila will eventually raise the dissolved solids concentration in the entire pila to the point at which the pressure/solids equilibrium is reached once again and the system will cease to function.

RO is primarily intended to separate dissolved solids from the feed water and not micro-organisms. Micro-organisms larger than the pore size in the RO membrane will be separated while those smaller than the pore size will pass right on through. This is why additional UV treatment of the processed RO water is recommended.
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Marinero
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[*] posted on 9-15-2012 at 10:09 AM


In reply to RnR, I have run a 6 gallon accumulator tank for over 5 years. My pila is fairly large and that,together with other usage, seems to prevent any build-up. And, R/O water tastes good. Btw, undersink units might not be the best bargain anyway, on account of short lifespan.



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[*] posted on 9-15-2012 at 01:19 PM


Quote:
Originally posted by Marinero
In reply to RnR, I have run a 6 gallon accumulator tank for over 5 years. My pila is fairly large and that,together with other usage, seems to prevent any build-up. And, R/O water tastes good. Btw, undersink units might not be the best bargain anyway, on account of short lifespan.


Re-using the RO waste water in this manner is actually a very good solution.

If the pila is replenished with fresh water and if the majority of the pila water is used for other uses such as toilets, showering, gardening, etc, the small addition of the RO waste water will not affect the overall quality of the pila water supply.
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[*] posted on 1-16-2017 at 12:04 PM
Agua De Baja


Based upon the above discussion, I installed the 5 Star Blue Angel whole house system 2 years ago from Agua de Baja. I have not had any issues and drink water straight from the facet, hose, shower, wherever without worries. It is a bit expensive, and you could probably build our own if you buy all the parts and the correct filters in the States. Very simple set up and easy to replace filters.
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