[Terrapreta] sewage sludge charcoal

[Jim Joyner]

I know human waste has carbon in it, but would char made from this be
the same as char made from woody material. I mean, is all char equal? It
would seem that all TP had been made with char from wood, right?

Obviously eliminating toxicity from waste is a good idea but might never
happen. Given whatever level of toxicity, would it not be better to
combined in char? Where does sludge go that doesn't get put on fields?

Jim