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  • From: Greg <FarmerGreg@UrbanFarm.org>
  • To: permaculture <permaculture@lists.ibiblio.org>
  • Subject: [permaculture] re: Grey water systems
  • Date: Thu, 17 Feb 2005 19:32:06 -0700

From the example below I have found that using sand over the long haul clogs and that pea gravel works better because of the clog factor. Also you can plant reeds in tier two for uptake of heavy metals and such.

Greg

i have not started to try it, yet, but i've read about (and had
second-hand accounts of) a 3+ tier grey water filtering system.

tier 1 is simply a container to stop splash errosion. the water pipes into
the box, hits the wall and then goes out the next pipe.

tier 2 is a sand filter. the grey water pipes into the bottom of the
container. the meeting place of the pipe and the container has a fine wire
mesh to keep out clogs. the container is partially filled with sand. the
out-pipe is located at the top of the container. the sand filters out
solids. tier 1 must be above the out-pipe of tier two, for gravity's sake.

the third tier is a large bathtub. the pipe enters one side (again, with a
filter) and fills the tub. the tub is filled with gravell and water-garden
plants. you want to choose plants to filter out the things that you
believe to be in your water.


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