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I put the following question on the Enviroment site and realized I should have put it in engineering. The concensis was that it would be too expensive when cheaper water is available, which I assume means bottled water trucked in. I'd still like to know if the units could be redesigned to be run more efficiently and be mass produced should potable water NOT be available.

The military claims that some of it's units can remove hazardous chemicals as well as radioactive waste.

The question was posed:
Can the military's ROWPU be used for providing potable water anywhere?

I've read that, in Iraq, the Marine's Reverse Osmosis Water Purification Units have removed cyanide and mustard-gas agents from Euphrates River water and created pure safe drinking water. I realize the output of these units are limited, but, can they be used daily for community drinking water here, where we're warned not to drink our slightly radioactive well water

Like most engineering units reverse osmosis units are cheaper when one has one or two (to allow for outage) large ones rather than many small ones. I understand the pressure drop required (and hence the power consumption) depends on the concentration of salts and if this is low the power consumption can be very muched reduced. They have been considered for purification of brackish water in London on quite a large scale. The army would not be your only possible source of supply of such units as many are used in various parts of the world. For some suppliers see http://www.thomasnet.com/products/revers e-osmosis-equipment-67801605-1.html

See the below link for discussion of removal of radium by reverse osmosis or ion exchange:
http://www.scdhec.net/eqc/water/html/rad ium.html

2006-07-28 04:11:51 by angrygramma

Reverse Osmosis Install water2buy.co.uk

Some say that certain minerals in the water are good for us, and using reverse osmosis is overkill in that it takes out almost everything including the good minerals. So now I'm in a dilemma

well i dont know about all that but i used to work in a spa where they bought the machine and i'll tell you water has never tasted better some of my co-workers that hated water started to drink more and more water just because it was so refreshing and uplifting. this said meybe some minerals are taken our wich you could get from other things like froots but just the fact that you tend to drink more water is awsome and is extremly good for your body. ;-)

2007-12-06 10:28:14 by dandyl

Price: $399.99 $215.49

Each individually contained filter just snaps into place. Including the membrane.
Easy to install
Filters change out at the push of a button

I want to add a water purification system to our home in Baja, Mexico. I'm tired of having to buy bottles of water for every vacation. Would a reverse osmosis purification system be okay to filter Mexico water for drinking?

Yes, but get a decent system. This is not the time to be thrifty.

2009-01-21 09:43:06 by theresa in oc

Price: $419.95 $419.95

Purity You Need with the Minerals You Want - restores natural calcium and magnesium minerals removed during the reverse osmosis process to produce clean, pure Mineral Water on Tap
Exceptional Purification - removes up to 98-percent of chemicals, heavy metals, sediment, and other contaminants then adds good minerals
Included Fast Flow RO Kit - Double the flow from your faucet fills your cup twice as fast as standard RO systems

reverse osmosis water purification system

Reverse osmosis is explained at wikipedia at: http://en.wikipedia.org/wiki/Reverse_osm osis

Reverse osmosis (RO) is a separation process that uses pressure to force a solution through a membrane that retains the solute on one side and allows the pure solvent to pass to the other side. More formally, it is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure. This is the reverse of the normal osmosis process, which is the natural movement of solvent from an area of low solute concentration, through a membrane, to an area of high solute concentration when no external pressure is applied. The membrane here is semipermeable, meaning it allows the passage of solvent but not of solute.

2008-12-19 04:18:34 by safenpure@ymail.com

No I don't think they can. RO is effective is between particle sizes ranging between 0.0001 to 0.002 microns (=micro meters = μm). The average particle size of estrogen hormones and compounds is about 3 μm. Therefore a filter with a larger pore size, such as micro filtration would be more effective than reverse osmosis.

2008-06-24 00:07:45 by coton