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 guess). 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? email "email@example.com", subscribe firstname.lastname@example.org email the same with unsubscribe to drop off the list
From email@example.com Sun Jun 22 12:37:02 2003 From: "Steve Lerner"
To: Cc: 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!