[Terrapreta] sewage sludge charcoal

[Sean K. Barry]

Hi Tom, Folke,

Could either of you reference me to where I can read about what you are describing as HEAP or the HEAP trap?

Regards,

SKB
  ----- Original Message ----- 
  From: Tom Miles<mailto:tmiles at trmiles.com> 
  To: 'Folke Günther'<mailto:folke at holon.se> ; terrapreta at bioenergylists.org<mailto:terrapreta at bioenergylists.org> 
  Sent: Friday, April 18, 2008 12:37 PM
  Subject: Re: [Terrapreta] sewage sludge charcoal


  Folke,

   

  Understood. Importing feed and concentrating it in animal manure is just an example of your HEAP process. We see thermal processing  as a means of putting the nutrients in a form that can be economically transported back out to where the feed is grown. By fractionating the P (from the K) we can recycle it either as feed, in place of dicalcium phosphate which is commonly used, or processed to a fertilizer which can also be transported out of the area.  

   

  Biochar is interesting because it potentially puts the P and K in a form that doesn't have to be reprocessed for use as fertilizer. Once the char is populated with the microorganisms they can do the job. But the biochar would still have to be transported to the feed producing area. 

   

  Tom  

   

  From: Folke Günther [mailto:folke at holon.se] 
  Sent: Tuesday, April 15, 2008 10:24 AM
  To: 'Tom Miles'; terrapreta at bioenergylists.org
  Subject: SV: [Terrapreta] sewage sludge charcoal

   

  Sorry, but you still have the HEAP trap there if yu don't spread he ash/char on the same land as was used to produce the feed to the animals.

   

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  Folke Günther

  Kollegievägen 19

  224 73 Lund, Sweden

  home/office: +46 46 14 14 29

  cell:               0709 710306  skype:  folkegun

  Homepage:     http://www.holon.se/folke<http://www.holon.se/folke>  
  blog: http://folkegunther.blogspot.com/<http://folkegunther.blogspot.com/>

   


------------------------------------------------------------------------------

  Från: Tom Miles [mailto:tmiles at trmiles.com] 
  Skickat: den 14 april 2008 06:31
  Till: 'Folke Günther'; terrapreta at bioenergylists.org
  Ämne: RE: [Terrapreta] sewage sludge charcoal

   

  Folke,


  Thank you for an excellent description. Since 1990 there has been work in Japan on charring sewage sludge which so far has not turned up toxic concentrations of pollutants such as heavy metals in the low temperature char. 

   

  We see the same mechanisms of Phosphorous concentration in the concentrated animal feed operations, or CAFOS. We developed a method of burning poultry litter to recover phosphorous-rich ash for feed and potassium-rich ash for fertilizer. Charring litter may make more sense. So far we have seen no results from the much advertized poultry  litter pyrolysis projects in Virginia and elsewhere. 

  (eg http://terrapreta.bioenergylists.org/knightpoultry<http://terrapreta.bioenergylists.org/knightpoultry> )

   

  Tom

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