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Can any of these systems be used on a boat?

http://www.pure-earth.com/ro.html

Thanks,


Jeannette
aa6jh
Bristol 32, San Carlos, Mexico
http://www.eblw.com/contepartiro/contepartiro.html

jeannette wrote in
:

Can any of these systems be used on a boat?

http://www.pure-earth.com/ro.html

No, these systems are designed to be used with potable water, not sea
water. RO systems for seawater run at 800+ PSI.

-- Geoff

So where do you get a pump like that? Can it run off the battery or do
you need to start the motor? I only need a couple of gallons a day.
Any ideas for budget DIYer's. I saw that one guys awsome setup who
posts here but I think it's a little ambitious for me.

That was probably me.

You really can't do it for less than around a Boatbuck ($1K). The basic
equipment remains pretty much the same from a single 24" membrane producing
5 gallons an hour to a double 40" like mine producing 35 gallons an hour.
It just takes more membranes and a larger pump. You can run a pump on 12V
but as Geoff has found you run into a practical limit of how much water you
can make. Even then you really need to be running the engine. A 1/4 HP
pump will draw 15 or more amps

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Don't see why they would not work in lake water, with a pre filter/strainer
of some kind to remove junk, and an ultraviolet sterilizer after the unit to
get rid of bacteria. Salt water would probably be too much.
Frank

"jeannette" wrote in message
...
Can any of these systems be used on a boat?

http://www.pure-earth.com/ro.html

Thanks,


Jeannette
aa6jh
Bristol 32, San Carlos, Mexico
http://www.eblw.com/contepartiro/contepartiro.html

Frank wrote:

Don't see why they would not work in lake water, with a pre filter/strainer
of some kind to remove junk, and an ultraviolet sterilizer after the unit to
get rid of bacteria. Salt water would probably be too much.
Frank

If you're relying on UV to sanitize the water, you'd better plan on a
recirculation system that runs continuously - not really desireable in
boating application. UV is a very poor sanitizer, especially in a
one-pass installation.

Keith Hughes

Pure Earth http://www.pure-earth.com/ sells what look like very efficient
high intensity one pass sanitizers. I have only looked at the specs, they
look good. Of course, specs and reality may be different.

"Keith Hughes" wrote in message
...


Frank wrote:

Don't see why they would not work in lake water, with a pre
filter/strainer
of some kind to remove junk, and an ultraviolet sterilizer after the
unit to
get rid of bacteria. Salt water would probably be too much.
Frank

If you're relying on UV to sanitize the water, you'd better plan on a
recirculation system that runs continuously - not really desireable in
boating application. UV is a very poor sanitizer, especially in a
one-pass installation.

Keith Hughes

"Frank" wrote in
:

Don't see why they would not work in lake water, with a pre
filter/strainer of some kind to remove junk, and an ultraviolet
sterilizer after the unit to get rid of bacteria. Salt water would
probably be too much. Frank



Bacteria won't go through the membrane on an RO system.....however, as
bacteria collect on the high side of the membrane, they die and break
apart, releasing their toxins. The toxins, unfortunately, DO pass through
the membrane making the outlet water toxic to humans. I doubt ultraviolet
light has any effect on the toxins, which aren't alive. RO people don't
like to talk about bacterial breakdown causing people to get sick drinking
RO water.....

I only tell you this because I'm a DISTILLER water person, here....(c; I'm
down to 3.8 ppm total dissolved solids in my output. The taste and the
coffee it makes is superb... NOTHING sanitizes like STEAM.

RO is STILL just a filter. Once the filter's clogged or something
approaches the filter that's smaller than the filter's design, it enters
the outlet water stream and no amount of wishing will change it....

--
Larry

This jerk called my cellphone and was nasty.
Continental Warranty -- MCG Enterprises -- Mepco-
24955 Pacific Coast HWY Suite C303
Malibu California 90265
888-244-0925
Fax: 310-456-8844
Email:
Read about them he
http://www.ripoffreport.com/view.asp...3&view=printer

"frank" wrote in :

Pure Earth http://www.pure-earth.com/ sells what look like very efficient
high intensity one pass sanitizers. I have only looked at the specs, they
look good. Of course, specs and reality may be different.



Easy to test....

Pump holding tank water into the RO's inlet. Put a glass under the outlet.
Have the sales wienie drink it. Wait 2 hours for the results before
getting out your checkbook....(c;

FYI, Ashley River water distills quite nicely (brackish with treated
sewage), but makes a tougher cleanup of the boiler after a few gallons. I
can't tell any difference in the taste even though the total dissolved
solids goes up to 12-15 ppm, which is nothing.... The residue looks like
pluff mud and salt crystals.

--
Larry

This jerk called my cellphone and was nasty.
Continental Warranty -- MCG Enterprises -- Mepco-
24955 Pacific Coast HWY Suite C303
Malibu California 90265
888-244-0925
Fax: 310-456-8844
Email:
Read about them he
http://www.ripoffreport.com/view.asp...3&view=printer

Having spent a fair amount of time trying to validate such systems in
pharmaceutical water plants, I'm highly dubious. It can be done, at
small flow rates and long exposures, but it is *sanitization* not
sterilization. Bacteria are fairly adept at repairing UV induced damage.
And UV doesn't kill the bacteria, typically, just makes them unable to
reproduce.

And, as Larry pointed out, you still have issues with endotoxins that
can permeate the membranes. Maintenance is always critical with RO
systems, as the pressure increases as you form a biofilm on the
membranes, making leaks more common (o-rings, membrane
cracks/perforations, etc.). Once you get that leak, then you have tons
of critters cruising through, enough to make you sick even if they can't
reproduce.

IMO, relying on RO to take care of water that has too high a bioburden
to drink otherwise is asking for trouble.

Keith Hughes

frank wrote:

Pure Earth http://www.pure-earth.com/ sells what look like very efficient
high intensity one pass sanitizers. I have only looked at the specs, they
look good. Of course, specs and reality may be different.

"Keith Hughes" wrote in message
...

Keith Hughes wrote in
:

Having spent a fair amount of time trying to validate such systems in
pharmaceutical water plants, I'm highly dubious. It can be done, at
small flow rates and long exposures, but it is *sanitization* not
sterilization. Bacteria are fairly adept at repairing UV induced damage.
And UV doesn't kill the bacteria, typically, just makes them unable to
reproduce.


Keith, I noticed these small RO systems put in boats use quite a bit more
pressure than the commercial units, say for a muni water system. Wouldn't
that make them break down the dead bacterium much faster, releasing their
toxins into the water supply?

--
Larry

This jerk called my cellphone and was nasty.
Continental Warranty -- MCG Enterprises -- Mepco-
24955 Pacific Coast HWY Suite C303
Malibu California 90265
888-244-0925
Fax: 310-456-8844
Email:
Read about them he
http://www.ripoffreport.com/view.asp...3&view=printer