Artabus

BKKdreaming, on 2011-10-27 05:10:10, said:

I would definitely also have my doubts. Which is why I suggested a simple distillation process; for extra certainty the two processes could be combined.

Or tablets such as these could be used
http://www.aquatabs.ca/

In extreme situations, a degree of flexibility is of course required.

http://www.industria...s-article5.html
to illustrate the point.

BKKdreaming, on 2011-10-26 05:46:44, said:

The flood water will have chemical run off from the fields, dead animals, more diseases than I can think of, heavy metals, all mixed in with the contents of sewers and canals. Does reverse osmosis clear that lot?
The good news is yes in theory. The bad news is in practice it possibly does not.
It depends entirely on the membrane and how new it is / whether it has been serviced.
Properly selected reverse osmosis membranes will give you water and only water - that's drinking water - from all predominately water based solutions. They may even in some cases be the best method of drinking water extraction.
It really does come down to the membrane. There are a lot of different types, so do your research is my advice.
A good membrane can last for years, especially if it is flushed regularly, and simple tests can be attached to the regular use of a membrane to monitor the performance. You should select equipment where the method of changing these components is quick and easy to do in the field.

Alternatively you can buy just the RO membrane and then use a pump to drive the water through it.
The pump can be one driven by hand (useful if the electricity is out), and you just have to make sure that it reaches the pressure required by the RO membrane. If you use eg two pumps together, just add their respective "heads" (a measure of pressure) to work out the total pressure obtained.

BKKdreaming, on 2011-10-26 03:29:51, said:

Hi
Let me come back to you later this afternoon (Bangkok time) please, In the meantime, who is the RO system manufacturer and what is the model number? How long have you been using that specific membrane?
Thanks
A

[/quote]

Michael Fish MBE (born 27 April 1944 in Eastbourne, East Sussex) is a semi-retired British weather forecaster, best known for his
BBC Weather television presentations, although he was actually employed by the Met Office.

He became infamous in the wake of the Great Storm of 1987; a few hours before the storm broke, on 15 October 1987, he said during a forecast: "Earlier on today, apparently, a woman rang the BBC and said she heard there was a hurricane on the way... well, if you're watching, don't worry, there isn't!". That evening, the worst storm to hit South East England since 1703 caused record damage and killed 18 people.
[/quote]

You ought to put his remarks in context. He was referring to a Hurricane which was at that time the other side of the Atlantic. It never came to the UK, so Michael Fish was correct in what he said. What happened was that the wind speeds which had been forecast for the English channel occurred further north ie over the southern counties. They reached (low) hurricane speeds, but they were not a hurricane.