Hi Dr Karve,
In your response to Rolf you suggest:
The tars from a gasifier contain a group of chemicals called
pyroligneous acids, which can be degraded by soil micro-organisms. So,
they should serve as food for the soil microbes.I do not know what
happens to the rest of the tar in the soil.
In my reply and suggestion to Rolf that you can use tar a briquette charcoal
binder, it was in the context of using the char for a combustion application,
not soil enhancement. It would seem a waste of effort to briquette fine chars
then break them down again for soil applications. I was advised of an instance
only last week, of a char trial that killed the crop, so it's not as simple as
one might think.
I am working in association with a number of people who are designing chars for
soil applications, and there is some evidence that charcoals made for cooking
and heating, are less appropriate for soils, excluding those used for carbon
reefs for sequestration, as these are not for soil improvement. There is also
evidence that chars need selection for soil types, and as a discussion, better
suited to one of the other forums facilitated by Tom Miles.
Doug Williams,
Fluidyne.
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