Home > Bio-Char / Terra Preta, Climate, General, How To's, Planning, Tools > Planning Ahead with Bio-Char

Planning Ahead with Bio-Char


Full Barrel

Full Barrel

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.

Ready for the First Burn

Ready for the First Burn

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.

Advertisements
  1. November 27, 2010 at 11:22 pm

    Biomass should never be just burnt, instead it should be fractionated to it’s high value uses.
    Biochar systems achieve this, to fill in gaps and hopefully expand your story & research , particularly concerning Christoph Steiner’s new work with Biochar and NH3 conservation in composting systems.

    Recent NATURE STUDY;
    Sustainable bio char to mitigate global climate change
    http://www.nature.com/ncomms/journal/v1/n5/full/ncomms1053.html

    Not talked about in this otherwise comprehensive study are the climate and whole ecological implications of new , higher value, applications of chars.

    First,
    the in situ remediation of a vast variety of toxic agents in soils and sediments.
    Biochar Sorption of Contaminants;
    http://www.biorenew.iastate.edu/events/biochar2010/conference-agenda/agenda-overview/breakout-session-5/agriculture-forestry-soil-science-and-environment.html

    Dr. Lima’s work; Specialized Characterization Methods for Biochar http://www.biorenew.iastate.edu/events/biochar2010/conference-agenda/agenda-overview/breakout-session-4/production-and-characterization.html
    And at USDA;
    The Ultimate Trash To Treasure: *ARS Research Turns Poultry Waste into Toxin-grabbing Char
    http://www.ars.usda.gov/IS/AR/archive/jul05/char0705.htm

    Second,
    the uses as a feed ration for livestock to reduce GHG emissions and increase disease resistance.

    Third,
    Recent work by C. Steiner showing a 52% reduction of NH3 loss when char is used as a composting accelerator. This will have profound value added consequences for the commercial composting industry by reduction of their GHG emissions and the sale of compost as a nitrogen fertilizer. ,

    Since we have filled the air , filling the seas to full, Soil is the Only Beneficial place left.
    Carbon to the Soil, the only ubiquitous and economic place to put it.

    Thanks for your efforts.
    Erich

    Erich J. Knight
    Chairman; Markets and Business Review Committee
    US BiocharConference, at Iowa State University, June 27-30
    http://www.biorenew.iastate.edu/events/biochar2010/conference-agenda/agenda-overview.html

    EcoTechnologies Group Technical Adviser
    http://www.ecotechnologies.com/index.html
    Shenandoah Gardens (Owner)
    1047 Dave Barry Rd.
    McGaheysville, VA. 22840
    540 289 9750
    Co-Administrator, Biochar Data base & Discussion list TP-REPP

    Biochar current Developments in Research, Reports, Legislation & Data Base :

    Biochar Soils…..Husbandry of whole new Orders & Kingdoms of life

    Biotic Carbon, the carbon transformed by life, should never be combusted, oxidized and destroyed. It deserves more respect, reverence even, and understanding to use it back to the soil where 2/3 of excess atmospheric carbon originally came from.

    We all know we are carbon-centered life, we seldom think about the complex web of recycled bio-carbon which is the true center of life. A cradle to cradle, mutually co-evolved biosphere reaching into every crack and crevice on Earth.

    It’s hard for most to revere microbes and fungus, but from our toes to our gums (onward), their balanced ecology is our health. The greater earth and soils are just as dependent, at much longer time scales. Our farming for over 10,000 years has been responsible for 2/3rds of our excess greenhouse gases. This soil carbon, converted to carbon dioxide, Methane & Nitrous oxide began a slow stable warming that now accelerates with burning of fossil fuel. Agriculture allowed our cultural accent and Agriculture will now prevent our descent.

    Wise Land management; Organic farming and afforestation can build back our soil carbon,

    Biochar allows the soil food web to build much more recalcitrant organic carbon, ( living biomass & Glomalins) in addition to the carbon in the biochar.

    Every 1 ton of Biomass yields 1/3 ton Charcoal for soil Sequestration (= to 1 Ton CO2e) + Bio-Gas & Bio-oil fuels = to 1MWh exported electricity, so is a totally virtuous, carbon negative energy cycle.

    Biochar viewed as soil Infrastructure; The old saw;
    “Feed the Soil Not the Plants” becomes;
    “Feed, Cloth and House the Soil, utilities included !”.
    Free Carbon Condominiums with carboxyl group fats in the pantry and hydroxyl alcohol in the mini bar.
    Build it and the Wee-Beasties will come.
    Microbes like to sit down when they eat.
    By setting this table we expand husbandry to whole new orders & Kingdoms of life.
    ( These oxidised surface charges; carbonyl. hydroxyl, carboxylic acids, and lactones or quinones, have as well a role as signaling substances towards bacteria, fungi and plants.)

    This is what I try to get across to Farmers, as to how I feel about the act of returning carbon to the soil. An act of penitence and thankfulness for the civilization we have created. Farmers are the Soil Sink Bankers, once carbon has a price, they will be laughing all the way to it.
    Unlike CCS which only reduces emissions, biochar systems draw down CO2 every energy cycle, closing a circle back to support the soil food web. The photosynthetic “capture” collectors are up and running, the “storage” sink is in operation just under our feet. Pyrolysis conversion plants are the only infrastructure we need to build out.

    To me, in the long run, the final arbiter / accountancy / measure of sustainability will be
    soil carbon content. Once this royal road is constructed, traffic cops ( Carbon Board ) in place, the truth of land-management and Biochar systems will be self-evident.

  2. June 20, 2015 at 10:41 pm

    When I started out making biochar a number of years ago, I tried a variety of designs for kilns using barrels to enclose and “cook” the wood I was making into biochar. None of them worked particularly well or were very efficient. Higher tech systems which fractionate the wood (or other material) into char, wood vinegar, syn-fuel etc. are either small and used for cooking or larger, stationary and requiring fuel that is uniform in size and moisture; i.e. preprocessed.

    Since I want to make biochar out of waste wood and do it in place and efficiently and have no particular use for the heat, other than barbecuing , I have been happy to learn about and start using what are sometimes called flame shield kilns, which are open topped cones or inverted pyramids where flaming materials added on top of a growing bed of coals use most of the available oxygen allowing the coals to out-gas into the clean flame above them without turning to ash. I use about four wheelbarrows of wood and get one heaping wheelbarrow of biochar from each unit.

    You don’t need an expensive kiln either. When I was first experimenting with this method, I used a cone shaped hole in the ground and others have used a trench. Either one allows you to try this without a lot of time and/or expense and find out if it will work for you. A couple links: http://www.biochar-journal.org/en and http://backyardbiochar.net/ These will get you started if you are interested in this.

  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: