The two biochar applied were obtained from wheat bran pellets
(Molino Grassi, Parma http://www.molinograssi.it/), treated by
different pyrolysis process. B1 was obtained through a pyrolysis
process with an average residence time of 3 hours at 800 C in a
transportable kiln provided by Blucomb (http://www.blucomb.
com/) of 0.8 m in diameter, holding around 30 kg of feedstock. B2
was obtained through a pyrolysis process with an average
residence time of 0.5 h at 1200 C in an industrial plant (AGT,
http://www.agtgasification.com/).