“Here is a full tutorial by O. J. Romo on making Charcoal and Biochar using a Brick Chimney Kiln.” The charcoal can be used for numerous things such water filters and building soil in gardens.
Detailed presentation in this excellent 4-part series. “Watch the whole day of the Biochar Workshop led by Bob Wells, soil scientist Jon Nilsson and Patryk Battle. Learn how to make biochar and its many beneficial uses including greatly enhancing soil life and fertility. Discover innovative ways to maximize its uses for dynamically carbon negative farming and gardening. Brought to you by Living Web Farms.org.”