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Biochar coffee husk question the Community helps answer

Coffee Husk Biochar

Biochar Coffee Husk

I approved this comment about 1 day after I asked the

question. It always amazes me how willing to help

most people are. So for Green Mountain Coffee folks I hope this gives you more to work with on your Project to Biochar coffee husks in Australia.

Comment from Paul Olivier Email him here

It is easy to gasify coffee bean husks in a top-lit updraft gasifier. But a small fan is needed to force air through the husks. I use a small 40 x 40 mm fan, and the speed of the fan is controlled by a speed regulator. The amount of power consumed by this fan in the gasification of coffee bean husks is generally less than one watt.

Virtually no smoke is created during the gasification of coffee bean husks.
Here are two pictures of coffee bean husk being gasified: Creating Biochar coffee husk.

Biochar coffee husk

Biochar coffee husk

Biochar coffee husk biochar gasifier for coffee husks

biochar gasifier for coffee husks




I did a similar experiment with much drier coffee husks, and I got a much bluer flame that what you see in these two pictures.
Of course I get a much better result gasifying rice hulls:

tlud gasifier for coffee husks Biochar coffee husk

tlud gasifier for coffee husks

closer look Biochar coffee husk

closer look

Here are some of the latest designs of my 150 mm gasifier:


Biochar coffee husk

Biochar coffee husk

All of these gasifiers are fabricated out of stainless steel so that they can be used over many years.

My 100 gasifier sells for about $30 US.
The 150 gasifier sell for about $50 US.

This is a totally non-profit effort.
I also design larger gasifiers of a 100 kW capacity.
Here equipment price drop to less than $5.00/kW.

For the larger waste management concept that I am promoting in developing countries, see:


This is a great resource and I would like to thank the author for his rapid response to a  Biochar coffee husk question.

Charmaster Dolph Cooke

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