I burned my 1st charcoal kiln full of wood today, loaded it up with wood, set the fire and watched it burn for an hour. I took some pictures with my new phone, I will post then when I can figure out how to down load them,
I used the design of the guy that posted the U-tube video about making Bio-Char for the small farm. He used 55 gal barrels plus 1 small barrel. I followed his design, placed the wood in carefully the wood in the bottom burn barrel, set a fire on the top, after it was going good I used a rake to spread it around, then I put the chimney on, then the after burner, it gets all of its combustion air from holes in the bottom of the burn barrel. The video said to burn it for 50 min to an hour and 10 min, so I split the difference and burned mine for an hour. He had used wood chips, I used wood from a saw mill. I should have burned it a bit longer, some of the wood at the bottom was still not burned through, but all in all I was pleased with my 1st attempt. I followed what the guy on the video did to the letter, He did not tell you to cool the after burner with a hose BEFORE you grabbed it.
I burned some of my fingers !!!!! I don't know what is a 1st degree and what is a 2nd degree burn, but I have blisters on 4 of my finger tips. It was a " Learning Experience " to be sure. I hosed off the chimney and the burn barrel before I touched them, lol. I ended up with about a wheel barrow and 1/2 of Bio-Char, some of the wood was only charred on the out side and was not char coal the whole way through. I put it up in the compost pile to work a bit before I will put it on the garden next spring. I will try to keep you posted as to how it works for me.
Never doubt that a small group of dedicated people can change the world, indeed it is the only thing that ever has.