At the 23rd International Solar Cooker Conference in Altötting, Walter Danner gave an engaging lecture entitled “From solar cooker to solar carbonizer – briquettes and biochar from water hyacinths on Lake Tana/Ethiopia”. Since then, a team of experts, who took part in the conference, has been in constant contact to help realize Walter’s visions. Carbonizing dried plants with solar cookers works, but it takes a lot of time and the amount of biochar is low.
So-called barrel carbonizers were gradually optimized in a large number of tests. Result: the C2C-Kiln. It consists of only 3 parts that are easy to manufacture on site and is highly efficient.