Date: Sun, 22 Jun 2003 12:28:01 -0700 (PDT)
From: David Van Brink 
To: elsewhere
Subject: [else] Greywater Evaporation Science
Cc: elsaburn

  Fellow consumers,

  So, at last year's burning man, they encouraged everyone to please
  NOT dump your greywater (dishwashing and shower runoff) onto the
  playa, and to instead evaporate it. Lots of folks had broad shallow
  trays made of black plastic raised on the edges. The idea is that
  you pour your greywater there, let it evaporate, and then bring
  the slightly dirty plastic home (for landfill incorporation, I

  jD and logan and I all noticed that these ponds didn't evaporate, they
  just sat around being wet and stinky, and we got to talking
  about how to improve them. 

  I did a little cubicle-science, and set out two identical trays, each
  with about 25cc water.

  In one, I put a scrap of paper towel, raised in the center by
  a rubber test-tube stopper.

  After about 30 hours, the one with the paper towel was dry; it
  was about another 15 hours before the reference tray dried.

  Remember, this is indoors in an air conditioned office in Santa Cruz,
  and you can see that the bit of paper towel I used is very small,
  compared to the total tray size.

  So I suspect that modifying the bman-approved low tray with a piece of cloth, raised
  up in many places, will dry *much* faster than the plain tray.
     ___     ___     ___
  __/   \___/   \___/   \___/    cloth across risers, to wick the water out.

     Scientifically yours --> dvb

playabound for july 4th?
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From Sun Jun 22 12:37:02 2003
From: "Steve Lerner" 
Subject: [else] RE: Greywater Evaporation Science
Date: Sun, 22 Jun 2003 12:36:47 -0700

Why not bring a water purification unit, large generators, and tons of
gasoline? Then you can drink the greywater!