Reverse Osmosis

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PeteC
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Reverse Osmosis

Post by PeteC » Sat Nov 17, 2012 9:15 am

We've touched on this before in that the process removes minerals from drinking water. I saw a show this past week which highlighted reverse osmosis systems used for making seawater drinkable, and converting sewage water into drinkable water. The systems were huge and the filters removed things down to 1/1 trillionth in size :shock: There was also a clear statement made that municipalities using these systems must re-introduce minerals to the water. If they didn't the water would actually start to leach minerals out of the human body when consumed. Double :shock: :shock:

To my knowledge every bottle and jug of drinking water we get here is purified by a reverse osmosis system, and in some cases by ultra violet light as well. The exception may be the clearly labeled mineral water, which I assume if not from a spring is a product of reverse osmosis as well, but minerals are re-introduced.

Does anyone know the degree of reverse osmosis used for regular drinking water, and the amount of minerals that remain...on average?

There is no place to research this on-line that I know of that is specific to Thailand and the water we drink here. Perhaps someone out there works in the water industry here and has experience? Thanks. Pete :cheers:
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Re: Reverse Osmosis

Post by Nereus » Sat Nov 17, 2012 10:00 am

Pete, I doubt that there are many reverse osmosis systems operating in Thailand. The method requires a high energy input, mostly from the equipment used to obtain the high water pressure required. The bottled water available here is treated via many stages of filtration, the UV light filter is used to kill bacteria. The membranes used in the RS process are very expensive and prone to damage, and also require regular maintenance---a process that does not exist here! :cheers:
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Re: Reverse Osmosis

Post by PeteC » Sat Nov 17, 2012 10:41 am

Well then we have fraud. The blue bottled water we get from a company in Rayong states on each jug, "Treated by reverse osmosis and ultraviolet ozonation" I don't think "ozonation" is a real word, but they use it anyway. :laugh: Pete :cheers:
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Re: Reverse Osmosis

Post by Terry » Sat Nov 17, 2012 10:57 am

Pete

I spent the first 21 years of my working career in the water / waste treatment business. The Company that I did my apprenticeship with, actually developed R.O.
I later worked on Ozone generating equipment from a German Manufacturer.

I've since forgotten most of it............

But for sure both R.O. and Ozonisation processes require high pressure pumping and high electrical power consumption respectively. Both being matters of simple mechanics or laws of physics.

I've also seen the labeling that you refer to and doubt it's authenticity................. :roll:

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Re: Reverse Osmosis

Post by cozza » Sat Nov 17, 2012 11:58 am

Umm...I have a reverse osmosis with remineralisation cartridge attached under my sink which comes from the USA here in Australia. No power or high pressure required, its just cartridges that filter the water and even I can change the cartridges...which need changing every year. It attaches to the tap under the sink that would normally feed the kitchen sinks, thats all, I installed it myself...easy to set up.

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Re: Reverse Osmosis

Post by deepee » Sat Nov 17, 2012 11:58 am

prcscct wrote: There was also a clear statement made that municipalities using these systems must re-introduce minerals to the water. If they didn't the water would actually start to leach minerals out of the human body when consumed.
Pete,
Now that suggestion seems a little odd to me because of the fact that so many millions of folk rely on just rainwater for drinking purposes, in fact some of the world's most expensive bottled water is just rainwater.
Expect that if one was to try and survive on water only that may have to be the case, but in a fairly sensible diet you should be receiving an adequate supply of minerals to cope with water without added minerals.
Personally I am a sceptic about filtered waters.The process requires thorough vigilance and proper maintenance to get good results.( checked out your local supplier's plant recently??). If the process fails the end result could be serious as all the nasties collected and saved in the filters "unload" and you could end up with a super concentrated batch of toxic water.
It puzzles me why so many people do not collect some rainwater where the conditions are suitable.
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Re: Reverse Osmosis

Post by JimmyGreaves » Sat Nov 17, 2012 3:06 pm

I created this website and have used many of their products, RO systems are available in all shapes and sizes with varying levels of filtration.

Domestic ones here:

http://www.emwc.uk.com/products2.asp?Ca ... egoryID=17
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Re: Reverse Osmosis

Post by PeteC » Sat Nov 17, 2012 3:40 pm

So, with these small home systems available the water supplier may be telling the truth, but I doubt the water is getting the proper filtering if he's using a small osmosis system for commercial purposes. Pete :cheers:
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Re: Reverse Osmosis

Post by Nereus » Sat Nov 17, 2012 4:51 pm

It is simply not possible to compare a commercial RO system with something that fits under the sink, and is just designed to fill a couple of bottles of water a day. It is even stretching the truth a bit to call an under sink unit that uses several filters, an "RO system". There are ceramic type filters that are claimed to stop bacteria, but by definition "reverse osmosis" requires supply water pressure to operate, and the more effective the membrane is, the more primary pressure that is required. :cheers:
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Re: Reverse Osmosis

Post by Terry » Sat Nov 17, 2012 6:38 pm

:agree:

I would describe an 'under the sink unit' as maybe an upmarket filter.

It certainly is not true R.O.

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Re: Reverse Osmosis

Post by Pedro C » Sat Nov 17, 2012 7:48 pm

Oh dear. And last year the old matron of the SP hospital wanted to check me for a case of reverse osmosis.
I'm glad I refused.
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Re: Reverse Osmosis

Post by PeteC » Mon Mar 11, 2013 3:05 pm

A new recommendation. I have a pretty good tongue for quality drinking water. I've come across one named "Sprinkle", and to my knowledge it is only sold in the 6000ml jugs, and only by 7-11. You can tell the difference immediately as compared to any other name 6000ml jugs, or the various 18 liter big jugs. Fresh, clean and a very good natural taste IMO. Pete :cheers:
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Re: Reverse Osmosis

Post by Bristolian » Mon Mar 11, 2013 3:10 pm

prcscct wrote:A new recommendation. I have a pretty good tongue for quality drinking water. I've come across one named "Sprinkle", and to my knowledge it is only sold in the 6000ml jugs, and only by 7-11. You can tell the difference immediately as compared to any other name 6000ml jugs, or the various 18 liter big jugs. Fresh, clean and a very good natural taste IMO. Pete :cheers:
Sprinkle are very good. We use them in BKK. Their bottles are always clean and in good condition. I am very pleased to hear that they are now in HH. In BKK they mostly have a home delivery service but you can be lucky to find them at some of the independent convenience stores
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Re: Reverse Osmosis

Post by PeteC » Mon Mar 11, 2013 3:15 pm

^ I'm in Rayong, Br. But if they're in my small village, for sure they must be in HH also. Pete :cheers:
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Re: Reverse Osmosis

Post by Bristolian » Tue Mar 12, 2013 12:19 pm

prcscct wrote:^ I'm in Rayong, Br. But if they're in my small village, for sure they must be in HH also. Pete :cheers:
I checked with Sprinkle in BKK yesterday and they do not supply bottled water to Pattaya, Rayong or HH.

Sprinkle currently has eight distribution centres to deliver bottled water to five different areas, namely Donmuang, Pathumthani, Thonburi, Rama 3 Road and Sukhumvit 103 Road. They basically cover all zones of Bangkok and suburbs. They said that they have no plans to distribute more widley.

Not sure how you managed to find it in Rayong?
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