posted on Aug, 3 2014 @ 12:47 PM
originally posted by: pheonix358
a reply to: intrptr
So yeah, I suggest two or more processes if you want pure water. Getting the chemicals out is a major pain but it is possible if you can do multiple
runs at set temperatures but that is very difficult.
First you discard the very initial portion of your distilled water, as it's most likely to have the contaminates from things with a lower boiling
point than water. If you still think distillation didn't get everything, keep the water fairly warm 80°F - 120°F, and aerate it for a bit over an
hour. Aeration means you have a container with open air flow, and either pump air through the water or pump the water through a showerhead or misting
nozzle which sprays water back into the container. This will get rid of a majority of VOCs (like alcohols or hydrocarbons) with lower boiling points
than water. They evaporate out into the open air.
And then if you want, distill that water again. But usually that level is really only necessary for industrial processes.
In most cases single distillation is usually fine if you don't pull your water to be distilled from an oil slick or an area known to be heavily
contaminated with petroleum products. Ditto in avoiding water that smells like lawn fertilizer or plasticy acrid smelling stuff, as those are the
other things likely to contain volatiles which may not be readily separated by distillation.
Other than that, distillation is likely one of the easiest ways to get clean water with the least resources or specialized materials. The main
downsides is that it does tend to use a lot of energy and it's lossy (a good portion of the water is going into the air) without good quality
For a survival situation, a kettle still is probably one of the easiest and cheapest methods. A good length of copper tubing and something to fit it
onto the end of a tea-kettle pot. Other than the kettle, the plumbing section of a hardware store should have all you need for under $20.