[Stoves] FW: [Biochar] Removing embers from three stone cookstoves to make biochar in Africa

[tmiles at trmiles.com]

Great video from Kevin McLean on recovering biochar from embers. 

 

From: main at Biochar.groups.io <main at Biochar.groups.io> On Behalf Of Stephen Joseph
Sent: Saturday, June 12, 2021 2:45 PM
To: main at biochar.groups.io
Subject: Re: [Biochar] Removing embers from three stone cookstoves to make biochar in Africa

 

Hi Kevin

 

Fantastic video.  I do the same although I add the urine to a mixture of worm juice vermicompost and biochar.  The biochar is also added to the worm farm with my food scraps.

 

Regards

Stephen

 

On Sun, Jun 13, 2021 at 6:15 AM K McLean <kmclean56 at gmail.com <mailto:kmclean56 at gmail.com> > wrote:

Here is a training video <https://drive.google.com/file/d/1AX2cPa4hVrSSazBwhl2-HsYjLY6jmCpC/view?usp=sharing> .  I'd love your comments.  We are about to distribute the training video and tongs to hundreds of thousands of smallholder farm families in Africa.

 

We are told, surprisingly, that removing embers from open-fire cookstoves does not increase the amount of firewood needed for cooking.  SNV Vietnam and SNV Cambodia confirmed with WBTs.

 

By putting rock beds in their cookstoves <https://www.sciencedirect.com/science/article/pii/S0973082620302775> , fuel efficiency is actually improved by a third even when removing embers.

 

We have tested removing embers with hundreds of families.  Women like the improved efficiency and they make 0.5 to 2 kg of ember biochar a day.  We've found that maize production improves significantly.  If a family applies 1 kg of biochar to their field every day, that is the equivalent of about one tonne of CO2 mitigated per year by sequestering the carbon.  With hundreds of millions of families cooking with open fires, the potential is enormous.

 

We are making the training videos as small files in 3gp format so they can be shared between basic/feature phones using bluetooth.  Smart phones are not needed.

 

We are going to add a section on using the trench method to turn crop waste to biochar.  And we are translating the video into many languages.  It is open-source.

 

All comments, suggestions are welcome.

 

Thanks,

Kevin McLean, President

Sun24

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