[Terrapreta] sewage sludge charcoal

[Folke Günther]

Agree. But i would be much easer to permanently let the people migrate to
the food producing area. By that, you can do the recycling with a much
smaller energy cost.  

That would not implicate some poor people being alone in a rural area. You
can do hat with a population density of up to 500 persons per sq. km, which
implicate a very dense rural area, or a rather sparse urban. What was the
population density of the pre-Columbian Amazon?

 

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

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 18 april 2008 19:38
Till: 'Folke Günther'; terrapreta at bioenergylists.org
Ämne: 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


  _____  

Jag använder en gratisversion av SPAMfighter för privata användare.
16556 spam har blivit blockerade hittills.
Betalande användare har inte detta meddelande i sin e-post.
Hämta gratis SPAMfighter <http://www.spamfighter.com/lsv>  idag! 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /attachments/20080418/771b1829/attachment.html