[Terrapreta] sewage sludge charcoal

[Tom Miles]

Posted April 13 to the Terra Preta website:

http://terrapreta.bioenergylists.org/guntherheap0408

 

Folke’s related posting to the discussion list was April 13, 2008

/2008-April
/004395.html

 

 

Tom

 

 

From: Folke Günther [mailto:folke at holon.se] 
Sent: Friday, April 18, 2008 11:59 AM
To: 'Sean K. Barry'; terrapreta at bioenergylists.org; 'Tom Miles'
Subject: SV: [Terrapreta] sewage sludge charcoal

 

Here are two sources. My opinion is that the first one is the better, but it
is not as ’scientiic’ as the pdf-file

 

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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  
blog: http://folkegunther.blogspot.com/

 

  _____  

Från: Sean K. Barry [mailto:sean.barry at juno.com] 
Skickat: den 18 april 2008 20:26
Till: 'Folke Günther'; terrapreta at bioenergylists.org; Tom Miles
Ämne: Re: [Terrapreta] sewage sludge charcoal

 

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 <mailto:folke at holon.se>  Günther' ; 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.

 

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

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  
blog: 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 )

 

Tom

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