Hardwood
Submitted by Tom Miles on Wed, 2008-08-13 22:53.
Invader Bush Namibia
Tom Miles, August 2008
Thorn bush is one of many invading bush species in Southern Africa. This bush is currently made into charcoal and in one location cleared to preserve habitat. The photo above is from the Chameleon Bush Encroachment Wiki created to help resource managers control the bush. Highlight the photo to see an album of photos showing the invader bush and chips recovered from clearing.
Principal species shown are sicklebush (Dichrostachys cinerea), blacktorn (Acacia mellifera), Mopane (Colophospermum mopane). Other principal species are yellow bark acacia (Acacia erubescens), red thorn or false umbrella thorn (Acacia reficiens),and to the South, three thorn Rhigozum (Rhigozum trichotomum).
There are hazards in the bush including the black mamba, or Shadow of Death, that struck us on the way to the Cheetah Conservation Fund (CCF) reserve. The beneficiaries of clearing the invader bush are the animals and, of course, the livestock which has lost both value from damaged hides and pasture.
Tom
Submitted by Tom Miles on Sat, 2008-04-19 23:56.
On the Practical Side
Max Henderson, SE Queensland, Australia, April 19, 2008
(Select photo to enlarge)
Dear All,
For those on the list who haven’t had the opportunity to experiment, here are some photos of my first trials. Apologies to those who are well ahead of this stage.
Photo 1 shows the very basic kiln, constructed of un-bonded second-hand bricks and sized to take a 200 litre drum (55 gallon in he US). This particular drum has a removable lid held in place with an over-centre clamp.
Photo 2 shows the drum in place and loaded with seasoned offcuts of local hardwoods such as Ironbark (Euc piniculata), which is hard and dense. The drum is raised off the brick floor the height of 2 bricks to allow firewood to be placed under. The base of the drum (on its side) is drilled with 8 x 8mm holes in a line evenly spaced. These permit the generated gases to exit and burn.
3 shows the flames after the load has started to gassify. Depending in the intensity of the external fire and the sizes, moisture content and density of the timber load, the beginning of the gasification phase can take from 30 minutes upwards.
4 and 5 show the char output.
Photo 6 gives an idea of the vast amount of energy released. At this trial the front of the kiln was also bricked up once the fire had started, to further concentrate the heat. For pure spectacle this is best done at night, preferably lubricated with copious cold beers. This is indeed hot and thirsty work. What you can’t hear is the whistling of the gas as it exits the holes in the drum, and the roar of the fire. Obviously there is huge opportunity to capture surplus gas and compress to store.
7 shows the first experimental vegetable bed prior to planting, approx 4m x 1.2m. The char was broken up before adding but this could have been done much better. Around 10cm thickness was added to the bed. Also added was 5 cm of compost and 1 kg of NPK fertiliser (13:13:15 + 2Mg). The bed was then forked a number of times to a 20cm depth. For comparison purposes an adjacent bed was prepared in the same manner including the compost and the NPK, but no added char.
Corni, broad beans and basil were planted in both. Definitely germination was better in the char bed and definitely initial growth was also more vigorous. Unfortunately the wallabies broke the fence ending that trial, but the fence has been reinforced and the beds planted again. This time I’ve added a third bed the same as the first with the char, compost and NPK, but added 5 cm of worm castings from my composting worm experimental pile. (I believe composting worms have equivalent miracle capacity as does char).
The test site is just above the creek flats on land that was a dairy farm for maybe 100 years before being abandoned some 20 years ago and allowed to return to natural forest, mainly eucalypts. Around 5 acres have been cleared. Soil texture is loamy, with recent tests indicating deficiencies across the full range of nutrients. Annual rainfall is in the 1500mm range. Being a fairly civilised part of the world we don’t have any of that snow stuff but winter daytime temps can plunge horrifically to 10 deg C (50F), with occasional night time frosts. Terrifying. Right now we’re at the beginning of Autumn.
I’ll update in a couple of weeks.
Max H
mfh01@bigpond.net.au
Submitted by Tom Miles on Sat, 2007-04-14 23:14.
Making charcoal at 4CN for our experimental study.
Richard Haard, Larry Williams, Fourth Corner Nursery (4CN), Bellingham, WA April 13, 2007
[G2:203]
Submitted by Tom Miles on Tue, 2007-03-06 19:35.
Charcoal production for carbon sequestration (1.1 mb pdf)
Gustan Pari, Djeni Hendra, Dadang Setiawan, Mahpudin Saepuloh, Salim Soleh, Mad Ali (Forest Products Technology Research and Development Center) and Kiyoshi Miyakuni, Nobuo Ishibashi(Japan International Cooperation Agency) April 2004
Demonstration Study on Carbon Fixing Forest Management in Indonesia
Submitted by Tom Miles on Tue, 2007-02-20 23:17.
Learning to use wood charcoal in farming at a Northwestern Washington native plant nursery.
Richard Haard, Fourth Corner Nurseries, Washington, Febuary 20, 2007
My motivation for preparing this post is to be able to use this motivate discussion of charcoal as a soil additive. Trying to do this work at a very busy nursery that is perhaps pushing their production factor too high (over 80%) is rather frustrating as experiments have gotten over ruled by planning changes, wiped out by harvest before I can read the data and the conditions set up for the experiment just do not work. However, I have been encouraged however and I am now using hardwood charcoal as a carrier for natural inocculum as a matter of routine.
Fourth Corner Nurseries is a wholesale supplier of native plant species, located on 77 acres in the coastal lowlands of northwestern Washington, USA. With approximately 40 acres under cultivation, we produce two/three million direct-seeded, field-grown, bare-root native plants annually. Our principal crop is individually seed-sourced, bare-root deciduous trees and shrubs, herbaceous perennials, grasses and emergent species such as sedges, cattails and rushes for environmental restoration purposes. Our mission is to sustainably grow plants while supporting workers and their families who depend on the farm for their economic subsistence. Use of surplus biomass from our willow coppice field and other materials is our alternative energy vision.
Aerial view of our farm
Aerial View of Fourth Corner Nurseries
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