[Terrapreta] pyro-7 for field production of charcoal

[ch braun]

Hello Gerrit,

I was also curious to know more about this Pyro-7 and could ask a
representative of Pro-natura here in France about it. So first the charcoal
produced has never been used for soil amendment so far, but he believes
there could be indeed very interesting perspectives there.

On the other hand, he considers an "ambulant" pyrolyzer as totally
infeasible. He said basically they are built to remain at the same place and
even in the case of "lighter" models, it's already very hard just to move
them from one place to the other.
I know, additionnal details about this last issue would have been fine, but
I really couldn't ask more... without being suspected of industrial spionage
:-)

Sorry, charcoal transportation remains an open problem!

Sincerely yours,
Christelle



On 9/17/07, Gerald Van Koeverden <vnkvrdn at yahoo.ca> wrote:
>
> Because of the huge transportation costs for charcoal, I keep looking
> for ways of making charcoal directly in the field from corn stalks,
> just as a few people on this site have claimed that the Amazonian
> Indians must have made it.
>
> Pro-natura has a small-scale continuous pyrolysis unit for vegetative
> biomass (Pyro-7).
>
> "http://www.pronatura.org/projects/green_charcoal_en.pdf"
>
>   Form their description, it seems simple enough that it could be
> increased in size somewhat and re-designed to be mounted on a
> platform to be pulled behind a tractor to process cornstalks as they
> are gathered and chopped up, allowing the char produced to be spread
> simultaneously as it is produced??
>
> If this could work, then it would be the cheapest way of producing
> char for the field to promote the idea of terra preta, since both raw
> material and char transportation costs become zero.
>
>
> Gerrit
>
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