[Terrapreta] Puzzle

[Greg and April]

If density is a measure of volume vs. mass, but all the pores are open to water infill, would not the true density be closer to that of water, if they were indeed filled with water?

Greg H.

  ----- Original Message ----- 
  From: folke Günther 
  To: MFH 
  Cc: Terra Preta 
  Sent: Sunday, June 15, 2008 15:59
  Subject: Re: [Terrapreta] Puzzle


  Char has a density of around 0.17. Don't expect to make it sink. It will adsorb a lot of things anyhow. When you put it in soil, it will work both as an adsorbent an as a home for fungi and micro-organisms. 
  If you want to e sure that all liquid passes as much as possible of the char;

    1.. fill the char in a bag of cloth (nylon? for washability) of about the same volume of a plastic bucket with a lid. 

    2.. In the lid, you make a hole, about 5 cm. 

    3.. Through the hole you run the open end of the bag and 

    4.. tie it onto a simple funnel that you get by cutting off the end of a PET bottle
    5.. fill your pee into the bucket through the funnel
  Then, you can be sure that all the pee will pass through the char, and ultimately collect in the bucket. When the bucket is full enough, you take up the bag, filled with 'charged' charcoal and put the remaining liquid on the compost or any other appropriate place.

  FG
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