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===Theory=== | ===Theory=== | ||
Heat woody feedstock in a low oxygen environment until thoroughly charred. | |||
===Design=== | ===Design=== | ||
Components required: | |||
#heat source | |||
#controlled airflow vessel | |||
===Materials=== | ===Materials=== | ||
Non-combustible; traditionally earth. For workability and weight considerations, steel is ideal. | |||
===Operation=== | ===Operation=== | ||
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===Variations=== | ===Variations=== | ||
* Folke Günther's "the simplest of the simple" [http://www.holon.se/folke/carbon/simplechar/simplechar.shtml two-barrel charcoal retort] | |||
Revision as of 05:02, 15 October 2013
Small-scale, straightforward, inexpensive Biochar production is a valuable component in many grassroots paths to ecological sustainability.
Charcoal production for soil amendment is an attractive option for horticulturists in most growing conditions, if suitable feedstock is readily available.
While elaborate, custom, high-volume systems have been designed and implemented, it is not unlikely that the greatest quantity of biochar will be produced in small, simple, low-cost, semi-mobile systems assembled in 'DIY' fashion from available materials.
The following project description documents one such replicable model, based on the common 55 gallon steel drum.
Theory
Heat woody feedstock in a low oxygen environment until thoroughly charred.
Design
Components required:
- heat source
- controlled airflow vessel
Materials
Non-combustible; traditionally earth. For workability and weight considerations, steel is ideal.
Operation
Results
Variations
- Folke Günther's "the simplest of the simple" two-barrel charcoal retort