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Making Biochar
in a 55-gallon TLUD
Seventh Burn
Tuesday, February 21, 2012

BURN: 1st - 2nd - 3rd - 4th - 5 - 6 - 7 - 8 - 9 - 11 - 12 - 13 - 14 - 15 - 16
Classes - Biochar - Gasifiers - Biogas - Photos - Videos
Mushrooms - Compost - Compost Tea - Sea Minerals - Fracking

Tuesday, February 21 was another beautiful spring day. Warm air, blue sky, few clouds, bright, sharp sunlight. Light, frisky winds moved the air. Lovely day to take pictures of dancing ethereal biomass gas flares.

Local herbalist Joanne Bakeman, Pauline, and her teenage son Joseph, joined us to bust up brush and admire the fireworks. We now have two metal lawn chairs to rest in. We'll need them before we're done turning this entire brush pile into char, plus transform the naked soil into a circular sacred mushroom, herb and flower garden.

VIDEO: Quick View
3 min 24 sec; 7.5 Mbyte, .mov

Brad loaded the barrel with twigs and chopped Johnson grassÑan undesirable invasive. These obnoxious, prolific weeds are often superior biomass converters, and can be harvested to recycle into soil carbon. Brad thinks gamma grass and other prairie grasses can make excellent biochar.

Making
Biochar
with a TLUD
how-to workshop
10am Saturday
March 31
4 Oaks Farm
This suits my "weedy, not woody" rule for feedstocks. I'm interested in corn stover, sunflower & artichoke stalks, straw, hay as feedstocks for our burn barrel.

The burn started quick. In five minutes, flames shot out of the chimney cap. In another five minutes, flames formed a wind-blown halo around the cap. At peak, transparent red gas flares flicked up to three feet downwind.

After 45 minutes, the burn quickly ran out of gas, the flare shrank into the chimney. We could easily smother and quench the remaining charcoal fire.

In part, smoke can be attributed to wind changing the draft and air intake into and out of the burn barrel. Strong gusts of wind can suppress flames, downdraft a chimney, and enhance smokiness. But I could see more than the wind was causing the unburned carbon.

Seems we need more air entering the burn barrel, and a lot more air entering the chimney. Most of the gas flames off after it exits the top of the chimney and gets air. Not enough air enters the chimney through our holes and slots to ignite more than a tiny fraction of gases rushing up the 8-inch stovepipe.

Understanding how to control the ignition of that gas flare is crucial to design an efficient heat exchanger. Most of the heat released in a burn is in the gas flare. An insulated TLUD is an efficient, contained, functional primary burner. But a key to new carbon-negative technology is to control secondary combustion in the gas flare.
THE CHAR CREW
Biochar Burn Home Team
Art, Pauline, Brad, Joseph, Joanne

BIOCHAR:

the story
the source
the miracle
the promise
Lettuce Seedlings
Trials with Biochars
Saratoga Apple, Summer 2010
Carbon-Negative
Farming
growing food in changing climate
Nutrient Dense Farming
at Saratoga Apple


The Earth Renewal and Restoration Alliance — www.ancientforests.uswww.carbon-negative.uswww.nutrient-dense.info2/14/2009