Kids: Don’t try this at home ! If the gases do not properly escape during heating, you will be in trouble.
Somewhere during my life, I either learned this lesson myself, or picked it up from others: “The longer ahead you plan, the greater the reward”. I decided this weekend to plan ahead for the days when snow will fall, when everything pertaining to the outdoors will become more difficult. I’m starting early this year by re-digging the pit where my Bio-Char barrel resides, and gathering some sticks and other burnable materials. This Bio-Char cooker is a big part of my commitment to lower my Carbon Footprint.
Above is the most basic form of Bio-Char cooker I could find online. It’s terribly simple: Place a metal barrel over a fire, with some holes in the lid. In a normal fire, the Carbon would bind with Oxygen atoms, and create Carbon Dioxide, or if the wood is left to rot, it will decompose into Carbon Dioxide and Water. By keeping the wood in the barrel it will cook all of the gases out, leaving mostly Carbon behind. The Carbon is then added to the soil, where it will be trapped for hundreds of years, and this carbon won’t contribute to global warming as CO2. It’s also very good for soil once it’s been activated.
When the gases cook out of the wood, they expand due to the heat, and they’re flammable. Prepare to see these jets of gasses burn out of the holes like afterburners on a jet. If your thinking of trying this your-self, I would recommend bigger holes in the lid !
When it’s time to light this candle (after some snow falls), I’ll stack wood all around the base, and under the barrel. The setup requires about four times as much wood on the outside which will be burned then what will be converted to Bio-Char. Even though 1/5 of the carbon in all of the wood will be removed from the carbon cycle, the 4/5 burned will make it into the atmosphere early, perhaps by a few years. In the future, I hope to expand the ratio of Bio-Char to Carbon Dioxide by stacking several barrels, and using the flammable gases from the lower barrels to cook barrels on the top. For now, I can bury a little carbon, and at very least, lower my impact on the warming planet, while improving my gardens soil.