[Terrapreta] sewage sludge charcoal

[Philip Small]

>
> I am thinking that household waste was included in the original TP feed
> stock
>
> Why do you think that
>
For one, it is a handy way to account for the accumulation of phosphorus.

>
>

>   Obviously eliminating toxicity from waste is a good idea but might never
> > happen.
>
> My experience tells me that well intentioned folks have the technical
tools they need to produce soil grade char.

I don't know, but I imagine any where one would put sludge, char would be
> better. of course, the cost might kill the deal. Maybe you would know about
> that.
>
I am persuaded that this is more true than not.  Anywhere you have a sludge
that is high enough quality to be land applied (or mixed with compost and
land applied)  char made from that sludge would be better.  One question:
will the N lost during pyrolysis have to be offset with energy-intensive N?
With legumes in the rotation, this concern is not a factor.

 -Phil
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /attachments/20080409/4d499f33/attachment.html