James Joyce posted this information about Dolph Cooke's Moxham Kiln on the Yahoo Biochar Production Forum:
As one of the people who has audited the emissions and the product from this technology I can say unequivocally that I have found:
(a) the emissions (based primarily on CO readings as an indicator of total hydrocarbons) are as good if not better than many technologies used by biochar manufacturers. They are not “perfect” but in fact better than many of the commercially offered technologies that we have examined.
(b) We have analysed and used the char from Moxham retorts, as we do with just about every product we can get our hands on. As a biochar it is up there with the best of the products in terms of porosity, water holding capacity, volatile residual levels, carbon content etc.
BE Chem (hons) PhD
Black is Green Pty Ltd.