Kelpie Wilson has been playing with the Japanese Cone Kiln for Biochar see the latest on her site:

She's finding that the Cone Kiln is easier to use than the alternatives and it produces more char too.

in her words:

I love my Japanese Cone Kiln. ... It is basically just a cone-shaped fire ring - a truncated cone. All you do is start a small fire in the bottom, and once that is all burned to glowing coals, you add small stick wood or branches on in layers. Each time the wood gets black and starts to ash, you add another layer. The layers underneath continue to cook out tar and gas, but they don't burn because air is excluded. When the cone is full you quench it with water. If you like, you can throw a grill on it and cook your dinner before you put it out.


Traditional methods of making charcoal in the Philippines, can be inefficient, and the Village Coco Project would like to improve that, as well as creating a fair trade certified coconut char product, that they could sell to help improve life for the coconut farmers in Palawan.

The Village Coco Project has just built their First High Efficiency Kiln, and they look forward to testing the new kiln between now and the end of May. Nike shoes | Air Max


Douglas Clayton and Hugh McLaughlin

Hugh McLaughlin and I have been working on describing our retort over TLUD char maker, which Hugh has christened the Jolly Roger Oven or " J-RO". The current draft of our paper The “Jolly Roger Ovens” family of Biochar-making devices in pdf, and attached to this story

From the YouTube notes:
A 30 gallon retort heated by a 55 gallon TLUD is the basic idea. I've been a biochar enthusiast for 5 years now and riding the learning curve on how to make and use biochar at home. This device can run very cleanly. The cleanest I have seen for a simple batch device.

From Karl J. Frogner,Dacember, 2011

6 Dec ‘11

E, Kelpie, aloha kaua-

It is nice to see your interest in JR Ovens and particularly in getting them on the open source page. I think that they are destined to become the arch-typical biochar oven (Biochar ovens And I think they are destined to play a big role in meeting biochar’s potential in climate change mitigation from thinly distributed feedstock ( July update). I would hate to see any commercial impediments do to profiteering holding back implementation, though it would be nice to see some well made ‘back yard’ ovens on the market for urban/suburban yard trimmings.


W. Bogale, Published in the Ethiopian Journal of Education and Sciences, Vol 5, No 1 (2010)

Mr. Bogale has been working in Ethiopia, and has developed a carbonizer that would allow a small land-holder to make charcoal out of agricultural residues and then dry and package that charcoal either for their own use, or for sale.

His paper has a very good table that helps make the case for the carbonizer, extruder system and it is available online through African Journals Online:

the abstract:


Commercial production of charcoal from greenwaste using BigChar technology
Presentation by
James Joyce, Black is Green Pty Ltd, Australia, March 27, 2010

About BiG

Background to BiG and BiGchar

Features and Benefits of the technology

- Fast Rotary Hearth Capabilities and Features:
1. Designed specifically for biochar production from latest jordan Sneakers | Nike Little Posite Pro USA CZ2520-600 Release Date - SBD


Vuthisa, November, 2009

They have kindly put together a great How to Make charcoal in your own backyard

I recently did some trials with 2 x 55 gal drums inside my fabricated Portable Metal Kiln. I recently increased the kiln width from 1.1 to 1.4 metre diam to accept 3 x 55 gal drums and although more testing is required I am satisfied with the MO. I have created a Google Group to discuss issues around its construction and usage.
Cost: Under $800
Availability: DIY


Updated September, 2012:


Chris Adam Kiln Chars Coconut Shells in Kenya
November 5, 2009

Cocnut Husk in Kenya
Coconut Husk in Kenya

A Chris Adam Kiln retort which was built a year ago at the Kenyan Coast.

They are using it 3x a week to carbonize coconut shells and it seems to work well.


More information about the Adam's Retort is on their site:


Peter Hirst, Pony Farm in Temple, New Hampshire, on May 9, 2009.

Follow the link for some great video from the recent Biochar Roundtable at the Lodge at Pony Farm in Temple, New Hampshire, on May 9, 2009.

Pony Farm Biochar Workshop
Pony Farm Biochar Workshop


PyroGen Power Generation
R&A Energy Solutions, LLC, May 31, 2009
Pyrogen ProcessPyrogen Process
PyroGen appears to be a company in North Ridgeville, OH that combines a prototype skid mounted pyrolytic sludge reduction process with a genset, both from Indiana.
Skid Mounted PyrolyzerSkid Mounted Pyrolyzer


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