A.D.
I do know that Ron was one of the first to promote gasifier
char-to-soils. I have been following this work closely as people like
Nathaniel Mulcahy trek around the world promoting the concept.
You are right about the carbon of course... I was quoting the article only.
Lloyd Helferty, Engineering Technologist
Principal, Biochar Consulting (Canada)
www.biochar-consulting.ca
603-48 Suncrest Blvd, Thornhill, ON, Canada
905-707-8754; 647-886-8754 (cell)
Skype: lloyd.helferty
Steering Committee member, Canadian Biochar Initiative
President, Co-founder& CBI Liaison, Biochar-Ontario
Advisory Committee Member, IBI
http://www.linkedin.com/groups?gid=1404717
http://www.facebook.com/group.php?gid=42237506675
http://groups.google.com/group/biochar-ontario
http://www.meetup.com/biocharontario/
http://grassrootsintelligence.blogspot.com
www.biochar.ca
Biochar Offsets Group: http://www.linkedin.com/groups?home=&gid=2446475
On 11/17/2010 10:27 PM, Anand Karve wrote:
Dear Mr. Helferty,
the idea of using a charcoal making stove for cooking and putting the
resultant charcoal into the soil is an idea that has been suggested
years ago by Ron Larson. Secondly, it is not true that most of the
carbon in the fuel is retained in the charcoal. It is likely that you
were just quoting Zaelke, but the pyrolysis gas, that is burned in
these stoves also contains carbon. My estimate is that charcoal
retains about half of the original carbon in the fuel.
Yours
A.D.Karve
On Wed, Nov 17, 2010 at 10:46 PM, Lloyd Helferty
<[email protected] <mailto:[email protected]>> wrote:
http://www.guardian.co.uk/environment/blog/2010/oct/21/barbecues-climate-change
October 21, 2010
Durwood Zaelke's emergency plan for tackling climate change ranges
from the Montreal protocol to carbon-negative barbecues
Barbecues that remove CO2 from the air could play a role in the
fight against climate change according to Durwood Zaelke, a
leading expert on rapid responses to global warming.
This year's outdoor cooking season might be over, but Zaelke
suggested at last week's 10:10 talk that from next summer
consumers should start demanding barbecues that do their bit for
the planet by generating rather than consuming charcoal – or biochar.
Zaelke's idea is based on a stove designed for use in the
developing world by Rob Flanagan. The stove creates heat by
turning wood or other biomass into charcoal, a process that
releases combustible gases.
Once the cooking is over, most of the carbon from the fuel remains
in the stove in the form of charcoal. This can then be mixed in
with soil, a process that sequesters the carbon for thousands of
years and boosts crop productivity.
... But whatever we do with non-CO2 gases, Zaelke says, we also
urgently need not just to reduce carbon dioxide, but to get to a
point as soon as possible where the world becomes carbon negative,
with humans sequestering more CO2 than we release. "That might
sound crazy," he says, "but we could do it".
The biochar barbecue idea is, I guess, really just a way for
Zaelke to remind us that there are various techniques – on big and
small scales – that we could use to suck CO2 out of the air.
--
Lloyd Helferty
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***
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