Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: poles apart on December 18, 2007, 06:50:42 am
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Did anyone watch it last night. A reverse osmosis trolley which purifies 50 litres of water as it rolls for £20! Built for the third world but I'll have a few!
Rod
http://www.bbc.co.uk/broadband/mediaplayer/players/bbc2/bb_rm_console.shtml?redirect=console.shtml&lang=en&nbram=1&nbwm=1&bbwm=1&bbram=1&ms3=4&ms_javascript=true&bbcws=2&package=4588759&clip=s5ep9_clip2
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i saw that, what a good idea!
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Stick a pump on it and away to go! Makes you wonder how a trolley system can cost up to a £1000!
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i know, cant beleive all the dragons paid up!
50 litres too, would be superb...hmmm we need to find where we can get one
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http://www.halfords.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10151&storeId=10001&partNumber=219238&langId=-1
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that doesn't use RO filter though Rosy. its just a simple carrier isn't it?
I saw it last night. didn't they say that it would only last for 12 months. one fillup every month? or did i hear it wrong?
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Seeing as we get the good old BBC here in Holland I got to watch that also...I think the girl mentioned that the unit would last for aprox 1 year with a water trip per day and after the filter was used up it then stained any water in the unit red so that users would know that no filtering is taking place and the water would be unfit to drink.
Cheers
Dave.
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They also said that they had not actually built it yet, its still in design form.
Chris
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I doubt it would cost £20 over here.
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In the uk cost would be around the £150-£200 i think.
Nat, no, this rolling thing just carries water, but that's all the freedom trolley etc do, albeit with a pump/battey, not exactly difficult to lash together.
Whether trollies are much use beyond extremely rare instances of poor access is debateable anyway. I wouldn't touch a trolly of any kind as they are a waste of money. But if you must have one, I'd go for this camping one at £40, add a pump (£100) and battery (£50) and it's still going to touch £300++ with hoses and fittings and stuff.
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Their design is flawed for the application they are putting it too.
They will need UV to kill all the waterbourne bacteria otherwise killer deseses will still get through and injure the users.
I have been talking to charities and individuals in Africa for years with regard to tackling the world water problems.
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on Yahoo answers I asked what £20 would buy in India and someone said,
'a hooker'
.
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on Yahoo answers I asked what £20 would buy in India and someone said, 'a hooker'
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lol,
they have a very sound idea, unsure that they could make and profit with a £20 price tag.
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what if the person or user lived right near the water - theyd have to walk miles in circles to filter it. And it seems to only be 1 reverse osmosis filter they talked about so as you say it cant really remove everything harmful. Good idea though
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I watched DD and was very interested in the dye that would be released when purification was no longer being done due to aged fiters. This is a graet idea for some of the manufacturers who come on here to add value to their products, how many times have new users gone out cleaning with dirty water, I know that I have before I put in a water quality check system.
It also made me wonder if wheeling this can drive the purification system then surely our van mounted systems can be attached to the wheels of the vans to power the units.
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It wont be anything for us WFP users, as it wont make enought water to
be of any real use, putting a pump on it wont work either as it works
differently from what we know, i.e. the movement of the drum will move the
RO filter inside (like a cork screw) pressing the water thru the filter.
Obviously with variations it could be made to work for us as well, but
why ? We dont have the same issues as a 3rd world country i.e. batteries, power
are all ample at hand.
I just wondered whether the poor people who will have to push it back to there
village will need to push it over/thru sand!, might be hard going (meaning they will
have drunk it all before getting home).
But as the Dragons realised if it does work it must be backed.
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makes you think how 'good' weve got it in this country-
the die idea was good - but we have tds meters to checking the water so no need.
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the trolley olnly brings the water qualitiiy down to drinking standard TDS would be about 100
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I thoght the third world was full of women with buckets on thier heads... why don't they carry on doing that but add a water purification tablet?
No need for fancy RO membranes for gods sake.
OVERKILL.
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as glyn said ro is just the start ro doesn't take bacteria out of the water so it is useless for there aplication
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I think this would be better from Halfords, a handy shelf for a pump and battery as well!
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_162064_langId_-1_CarSelectorCatalogId__CarSelectorGroupId__varient__categoryId_38193_crumb_63502_parentcategoryrn_38193
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Their design is flawed for the application they are putting it too.
They will need UV to kill all the waterbourne bacteria otherwise killer deseses will still get through and injure the users.
I have been talking to charities and individuals in Africa for years with regard to tackling the world water problems.
Obviously Glyn knows what he's talking about, but can someone explain to me how a micro-organism which, although it is incredibly small is still made up of some millions of molecules, can pass through a membrane which can reject single molecules of dissolved solids?
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on Yahoo answers I asked what £20 would buy in India and someone said, 'a hooker'
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for a week.
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Their design is flawed for the application they are putting it too.
They will need UV to kill all the waterbourne bacteria otherwise killer deseses will still get through and injure the users.
I have been talking to charities and individuals in Africa for years with regard to tackling the world water problems.
Obviously Glyn knows what he's talking about, but can someone explain to me how a micro-organism which, although it is incredibly small is still made up of some millions of molecules, can pass through a membrane which can reject single molecules of dissolved solids?
when you get to an atom then past that to light then it gets real technical ::)
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Obviously Glyn knows what he's talking about, but can someone explain to me how a micro-organism which, although it is incredibly small is still made up of some millions of molecules, can pass through a membrane which can reject single molecules of dissolved solids?
It doesnt prevent molecular sized objects, otherwise water itself wouldnt pass through ( 2 hydrogen molecules and 1 oxygen- h20 ) Dissolved solids are larger than molecules. These types of bacteria can be so small that they can exist in pure water with a reading of 000, thier presence won't affect the waters purity. Luke
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on Yahoo answers I asked what £20 would buy in India and someone said, 'a hooker'
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for a week.
Hope she/he/it likes washing up. Plenty of it here.
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as glyn said ro is just the start ro doesn't take bacteria out of the water so it is useless for there aplication
I dissagree with that, when you look at the statistics of a R/O its says it removes all toxics from the water, I cant believe they would not know that and be on TV stating it will work, I believe the UV is only needed by static water. I am sure that it will work, water purification for campers, off road vehicles doesnt have UV just R/O and they use that water too.
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If the water is coming from a poor source then it needs a uv light to kill the bacteria. Thats what food production companies do with their RO systems. Luke
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You got to remember than in India outback and parts of Afica there is running sewerage in most towns and certinaly 'in the country', so it'll take a lot more than Ro to cure that. I wouldn't drink that stuff.
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Ro membranes remove between 90 and 98% of impurities depending on the membranes specification, its the percentage they dont remove that is the problem.
In the third World they dont have to worry about removing pesticides and detergents etc. as we do. The villans are pathogenic microrganisms which kill millions of people every year!!!!
When you think that more kids die every hour from drinking local water than people that were killed in the twin towers it puts it into perspective.
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I think this would be better from Halfords, a handy shelf for a pump and battery as well!
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_162064_langId_-1_CarSelectorCatalogId__CarSelectorGroupId__varient__categoryId_38193_crumb_63502_parentcategoryrn_38193
I have one of these in my garage that I bought for exactly that purpose. It is very light and holds a decent amount of water. A small battery and a pump will turn this into probably the easiest to use trolley on the market. The dry weight would be about 5kg.
I saw the Dragons Den program, my concern will be the units cheap construction being able to put the water under enough pressure as the membrane is passed through it to provide a decent rejection ratio. Also what happens to the waste water? If you collect 50 litres when you get home will you only end up with 20 litres? Also I always thought that RO membranes did not guarantee filtering out bacteria/microbes, which is one of the problems with their water.
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Probably cheaper to air-drop crates of Coca Cola. Tastes better than water any day, and its fortified with sugar to help keep thier strength up.
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simple solution? Just put some salt in first then put it through the ro. Or one of those tablets you get in camping shops.