Thinking Global Acting Local

A documentary video website of how people can scale some big ideas down to action in their personal lives.

The first “Big Idea” is biochar.  Biochar is biomass (plants, wood, dung, ) in the absence of oxygen so that it becomes pure carbon, like charcoal.

Making, and using, biochar offers practical and available solutions to three global problems:

• Climate change and global warming
• Hunger and starvation
• One of the 4 main causes of death for children under 5 years old — and often their mothers — through poisons from indoor-cooking smoke.
  

A fallow field, one half remained fallow and the other half tilled in with biochar. And then we left the field untouched for 2 years. We did not add any fertilizer or pest control. Just left it alone. We ran the disc harrow over the land and planted some sweet corn on the whole field.

You can see the difference below, filmed in real time.

At a recent workshop on biochar at the Pony Farm in Temple, NH, one of the presenters, Hugh McLaughlin, gave some history and ideas about the actual formation of the Black Earth.  First, most of it was not black.  There was Terra Mulata, a brown earth.

Hugh refers to the book, 1491 – New Revelations of the Americas Before Columbus, by Charles C. Mann. It is worth the read!

Let’s play with fire — and learn from it!

Gasification is central to understanding the efforts to produce smokeless and safe stoves for cooking with biomass fuels as well as making biochar. In layman’s terms, it means using heat to drive off the components of biomass that are not carbon and heating them in an air rich environment so that they burn and leave the carbon behind. So you are literally burning smoke and generating lots of heat. A primary supply of heat to drive out the volatile materials of the wood as smoke and a secondary supply to ignite the smoke.

Dirk-Jan built a gasifier to evaluate the grass pellets he produces and to assess how much slag and ash they produce.  It was kludged together with scrap parts he had lying around his shop and is certainly not a production model but it does illustrate how to burn smoke.

We have been taught to light fires from the bottom of the wood pile but in this video the fuel was lit by from the top while the hot air came from below. This gives the stove the name Top Lit Up Draft, TLUD.

When the fuel is lit from below it completely burns the fuel above it rather than just creating smoke. That leaves ash instead of the carbon in the form of charcoal, the desirable biochar. Pronounced “B-LUD”. The fuel is ignited from the bottom and up until a certain point generates a lot of smoke.

The TLUD has the advantage of producing biochar while it is being used as a cooking stove. TLUD has the advantage of producing biochar while it is being used as a cooking stove.

Here is a diagram to help with the terminology of the TLUD.

As I wanted to make a video that would illustrate how gasification actually burns “smoke” in order to produce heat, we ignited the fuel through a port at the bottom of the stove to generate lots of smoke and then lots of heat. If we had lit the fuel from the top, it would have been smokeless. This same stove works in two different ways: as a TLUD and as a BLUD. Pronounced “T-LUD”. The fuel is ignited from the top and is essentially smokeless.

This is an introduction to the Biochar Roundtable at the Lodge at Pony Farm in Temple, New Hampshire, on May 9, 2009.

Before we move on. let’s watch Hugh McLaughlin demonstrate some TLUD stoves he makes with scrap tin cans…

If you want a more graphic illustration of how the TLUD does not burn the fuel but rather the gases that have been driven off the fuel, here is a video I made showing lots of smoke being burned off. The next demonstration produced charcoal with a retort made from a recycled Cornelius keg.  I’ve taken the liberty of assuming that most people looking at this site would not be familiar with the Cornelius keg. In the following video, Hugh explains what it is and how to convert one as an excellent and affordable retort.

The kegs have been discovered by the home brew beer set and they might be driving the price up.

And now for the keg in action as a retort for making charcoal from wood scraps.

You will see more videos of the Cornelius keg because Hugh gave me one to experiment with.  I can hardly wait!  This more fun than the old Gilberts Chemistry Sets  (if anyone remembers!).

Dr. Thomas B. Reed is going to show us his technique for making charcoal with inspiration from Jack Daniels.

Really.

Watch.

Tom modified the Jack Daniels “rick” for a technique for making a home brew. Of charcoal, of course!

Wonder if it works?  Check this out:

The next demonstration produced charcoal with a retort made from a recycled Cornelius keg.  I’ve taken the liberty of assuming that most people looking at this site would not be familiar with the Cornelius keg unless, of course you are part of the home brew beer fraternity. In the following video, Hugh explains what it is and how to convert one as an excellent and affordable retort.

Now let’s see it in action!

There will be more video about the Cornelius keg because Hugh gave me one to experiment with and I can hardly wait!

“More than half of the world’s population—three billion people—cook their food and heat their homes by burning coal and biomass, including wood, dung, and crop residues, in open fires or rudimentary stoves. Indoor burning of solid fuels releases dangerous particulate matter, carbon monoxide, and other toxic pollutants, and releases greenhouse gases into the air. The resulting indoor air pollution levels are 20 to 100 times greater than the World Health Organization’s (WHO) air quality guidelines allow. Unfortunately, the health risks and threats to the environment are on the rise: the International Energy Agency estimates that 200 million more people will use these fuels by 2030.

“WHO estimates that 1.5 million people die prematurely each year from exposure to indoor smoke from burning solid fuels. In fact, indoor air pollution from household energy is ranked fourth in the list of serious threats to health in less developing countries, after malnutrition, unsafe sex, and unsafe water. Women and children face the greatest risks. Breathing unsafe levels of smoke indoors more than doubles a child’s risk of serious respiratory infection and is associated with pregnancy problems, such as stillbirth and low-weight babies.” Partnership for Clean Indoor Air

I call them “Stovers”, a loose network of people who are experimenting on smokeless stoves that use very little fuel and ideally produce charcoal for use as biochar or for other heating.

A prominent pioneer in this field is Nat Mulcalhy of WorldStove.  His explanation and demonstration of this great stove is far better than the video, but please bear with it… and don’t worry, there are english subtitles!

I would love to get my hands on one of his Lucia stoves. I just happen to think this would be a great catalyst to trigger conversations that I could video.

Here is a combination of grass-roots organization and appropriate technology which contributes to the local economy.

In this next example, solar stoves at a refugee camp for Darfur refugees.

We can see how the stoves are made in the local community.

There are many other examples of economic development and stove technology coming on this website. But they all adhere to the belief that we must cut down on the amount of fuels we use for cooking and heating.

Bear in mind:

Nationwide, the estimated 60 million barbecues held on the Fourth of July alone consume enough energy—in the form of charcoal, lighter fluid, gas, and electricity—to power 20,000 households for a year. That one day of fun, food, and celebration, says Tristram West, a research scientist with the U.S. Department of Energy, burns the equivalent of 2,300 acres of forest and releases 225,000 metric tons of carbon dioxide. It also produces other air pollutants — including a few that might surprise you. Sierra Club

All through the Tri-State area, where New York, Massachusetts and Connecticut border each other, the forests were stripped of trees for charcoal needed to production of iron.  This area was the home of many of the military ironworks for the Revolution, the Civil War, etc.  Quite a few iron furnaces have been reconstructed, but of the charcoal kilns these are the only ones I know of, reconstructed and left in nature in the hopes that they will be respected.  In fact, I have mixed feelings about putting them up on the Internet and, as you might  have noticed, I have been cagey about where they are located.

This how they are sited, only a few feet separating them.  I have no idea how many there were in this particular spot.

Showing the scale and also the retaining wall behind the kilns.  They were built into an incline so that fresh wood could be loaded into the top from wagons.

From the rear, showing where the wood was loaded on the hill.

Here is the detail for the lower entrance. I wonder if the more even, rectangular rock is phyllite, found in this area and used since colonial days for fireplace hearths because it was thought to hold up very well to fire. It would make sense and phyllite does resemble this rock, but I am not a geologist!

Other vent holes can be seen part way up.

About one meter from the ground are some regularly-spaced rectangular holes that might have supported some iron beams to hold the biomass above the fires.

Around the kilns are these chunks of glass from the ash.

Low-Hanging Fruit: easy steps, things we can do that will produce some results easily and quickly.

For example, spreading an inch or two of biochar on all the arable land on Earth in order to reverse and reduce global warming is not low-hanging fruit.  We might have to do it  to save ourselves one day, but it is not easy and quick!

But producing efficient, smokeless stoves to remove soot from the air is.

Painting roofs white to reflect solar energy back up to the atmosphere, is.

Using CF and LED light bulbs to reduce energy consumption, is.

Make your own list.  And then start picking your fruit!

If we are going to reduce the amount of carbon dioxide in the atmosphere in order to to stop the greenhouse gas effect, we must do more than conserve energy and use sustainable fuel sources.  We have to actually remove carbon dioxide from the atmosphere.  Nature already does this.  It pulls carbon dioxide out of the atmosphere through photosynthesis and stores carbon in plant matter.  But when we burn it or let it compost or rot, the carbon is joined with oxygen again and goes back into the atmosphere as carbon dioxide.  The problem gas.

He has been thinking about how to make charcoal at a scale that would suit a farm using equipment available to a farmer. But being in the excavation business, however, he had his own commercial earth-moving gear that you would not really find lying around a farm.  This allowed him to ramp up the scale and the speed of making some tests, but on a smaller and slightly slower scale everything could also be done by tractor with a bucket and grapple.

He remembered those remains of charcoal pits and kilns.

His plan is quite simple: rather than make biochar someplace and then cart it to the field, why not actually make it in the field itself?  It would be based on a traditional way: covering a pile of scrap wood, tree clippings, cut-offs, etc. with dirt and letting it pyrolyze right on the spot.  The same dirt that forms the “retort” would end up as the home for the charcoal.

There is no apparatus required.  Just the existing dirt and some bad hay (of which there is plenty where we live).

What needed to be tested was the design of the pile, how the wood should be stacked, and what kind of air or smoke openings should be placed.

STEP ONE:  MAKING THE STACK

Again, the Bobcat can be replaced by a tractor’s bucket loader and grapple.

https://vimeo.com/165762868
 

It’s time to light up!

After a few days of smoldering, the pile was ready to be opened.  Well, in truth, we were dying of curiousity!

Now let’s switch to an implement of a different scale…

This is only a small fraction of the pile.  There is plenty of good carbon to be put into the soil that has been taken out of the air.

The experiment is not over.  There will be more piles to make biochar and to improve the process: the smoke needs to be burned off, the air-flow improved…  the charcoal will need to be matched with appropriate compost…

The moral of the story:

Here is the bottom line, why we’ve come all this way:

Heat with grass not gas!

Let’s visit a plant nursery in Pawling, New York, that has been using grass — made into pellets — to heat their large greenhouses. The pellets are burned in an unmodified rice-coal stove.  For the sake of a video demo we  fired up the stove for the first time since it was used last winter.

Dr. Tom Reed and Dirk-Jan Rosse chat about making grass pellets for  heating.  Could this really be the new coal?

There is a lot of fallow farm land in our area — abandoned farms, land that has to be brush hogged for absentee owners, whatever.  Yet left as “weeds” one to two acres can heat a house for a year when made into pellets!

A couple of days later we walked the field and Dirk-Jan noticed some particularly tall goldenrod.  I have heard it said by some farmers that there is more money to be made from goldenrod than from corn!  It could be.  Harvesting goldenrod is a simple three step operation:  cutting, windrowing and baling.  No special equipment, no spraying, no fertilizer.  Much less fuel and time is spent on this crop.

This is not a demonstration project, proof of concept, or experiment.  No public or foundation funds have been awarded this project (or, for that matter, this website).  It is the beginning of a new business, bootstrapping and paying for itself as it catches on.

Continue here to see how this field of golden rod is harvested.