[Terrapreta] a braoder theory of torrefaction and TP

[Duane Pendergast]

            Right, 

 

And if those companies can engineer, promote and have policy implemented to
reap greenhouse gas reduction credits from methane production they will do
so. In the extreme we might anticipate landfill sites built just for that
purpose. Ultimately they could divert all the organic material we envisage
as the basis for terra preta.

 

Duane

 

-----Original Message-----
From: terrapreta-bounces at bioenergylists.org
[mailto:terrapreta-bounces at bioenergylists.org] On Behalf Of Gerald Van
Koeverden
Sent: December 11, 2007 8:36 AM
To: Terrapreta preta
Subject: Re: [Terrapreta] a braoder theory of torrefaction and TP

 

SKB's suggestion is already being engineered by huge waste management
companies.  They are tapping into their landfill sites to draw off the
methane to generate power.  They have realized they are sitting on a ton of
cheap energy, and have another way of turning their garbage into dollars.

 

Gerrit

 

On 11-Dec-07, at 10:15 AM, Jim Joyner wrote:





Sean, Duane,

Suffice it to say, there's something worth looking at here. We are not
likely to find a panacea anyway. There are so many variables: climate, soil
types, economic needs and conditions, cultural practices . . . obviously,
there's room for many kinds of solutions.

Jim

Sean K. Barry wrote: 

Hi Duane, Jim,

 

You've made a super good point here!  Methane-CH4 from buried wood would be
an absolutely important issue.  A volume Methane gas-CH4 has the same global
warming potential as 25 times that volume of CO2 over a 100 year period and
the same global warming potential as 72 time that volume of CO2 or 20 years.
As the buried wood decomposes it will release Methane.

 

Here is maybe an interesting idea, though.  Suppose wood is buried and kept
wet and warm under the subsoil.  Then, like a landfill, it is sealed from
below and it is integrated with pipes from above.  This "wood-fill" could be
then treated like a source of natural gas.  What would you think of that?
Of course, as you harvest the Methane, you would reduce the carbon storage
and the ground would eventually subside.

 

Regards,

 

SKB

----- Original Message ----- 

From: Duane <mailto:still.thinking at computare.org>  Pendergast 

To: 'Jim Joyner' <mailto:jimstoy at dtccom.net>  

Cc: 'Terrapreta <mailto:terrapreta at bioenergylists.org>  preta' 

Sent: Monday, December 10, 2007 9:29 PM

Subject: Re: [Terrapreta] a braoder theory of torrefaction and TP

 

Good thoughts there Jim, but it would likely perform similarly to  a
landfill. Those tend to generate methane which we are told is a much more
effective greenhouse gas than carbon dioxide.  Charcoal might be a good
substitute for some of the goals you mention and seemingly would avoid the
methane production.

 

Duane

 

 

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