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N-Ish
http://www.newscientist.com/news/news.jsp?id=ns99996185

Army rations rehydrated by urine


19:00 21 July 04

Exclusive from New Scientist Print Edition. Subscribe and get 4 free issues.

Would you eat food cooked in your own urine? Food scientists working for the US military have developed a dried food ration that troops can hydrate by adding the filthiest of muddy swamp water or even peeing on it.

The ration comes in a pouch containing a filter that removes 99.9 per cent of bacteria and most toxic chemicals from the water used to rehydrate it, according to the Combat Feeding Directorate, part of the US Army Soldier Systems Center in Natick, Massachusetts. This is the same organisation that created the "indestructible sandwich" that will stay fresh for three years (New Scientist print edition, 10 April 2002).

The aim is to reduce the amount of water soldiers need to carry. One day's food supply of three meals, weighs 3.5 kilograms but that can be reduced to about 0.4 kilograms with the dehydrated pouches, says spokeswoman Diane Wood.

The pouch - containing chicken and rice initially - relies on osmosis to filter the water or urine. When two solutions of different concentrations are separated by a semipermeable membrane, with gaps that allow only water molecules to pass through, the water is drawn to the more concentrated side.


The membranes are made of thin sheets of a cellulose-based plastic, with gaps between the fibres that are just 0.5 nanometres across, too small for bacteria to pass through.

A hungry soldier pours dirty water into one end of a foil sachet containing two inner pouches separated by the membrane. The water seeps through the membrane into the dehydrated food on the other side. As it dissolves large molecules in the food, it creates a very high concentration solution. The osmotic pressure created then draws more water through the membrane.

Hydration Technology of Albany, Oregon, which makes the membrane, says soldiers should only use urine in an absolute emergency because the membrane is too coarse to filter out urea.

The body will not find this toxic over the short term, says Ed Beaudry, an engineer with HTI, but rehydrating food this way in the long term would cause kidney damage

 

EUREKA FOR UREA! Consuming my own urine for weeks on end still wouldn't compre to the abuse I give my liver every night. I can imagine it looks like a dried apricot by now. Poor thing

 

That probably still tastes better than Ditty Moore's...

 

I dont know if I could live with myself after eating my dinner that I just peed on, then again, how would that be any different than your average late night trip to taco bell????

 

You're absolutly right. When I was 17 I was a shift manager at McDonalds and lets just say that if you were an ******* in drivethough, you sure couldn't see what was going into your food behind the counter!

PS. I'll never eat at McDonalds again

 

I lived off MRE's for about 4 months. They get old fast. But I still think I'd kill a man for a MR.E before I ate something that required me to **** on it to eat it. I fit a half dozen MRE's into my day pack without too much trouble. Plus about a gallon worth of water bottles, and an extra set of DCU's and some other shyit. it was heavy. But I'll put up with the extra weight in the name of somewhat apetizing meals!

 

Amen to that!