<div dir="ltr"><div><div><div class="gmail_extra"><div class="gmail_quote">
A stove that makes both syngas and biochar can be just as clean-burning as any other type of stove. Nothing is sacrificed in terms of human health if a stove makes biochar. But when biochar is made, there is a benefit that goes far beyond human health: CO2 is lock away in the soil for a very long time, and does not make its way into the air or oceans. Also we have demonstrated in over 20 experiments in Vietnam, Laos and Cambodia, how biochar greatly enhances plant growth, while reducing costly inputs of fertilizer and water in attaining similar levels of growth. <br>
<br>The beautiful lake, which lies right at the center of the city of Dalat where I live, is always heavily polluted with agricultural run off. Huge areas of the lake are covered from time to time with dead fish. If biochar and compost were added to the soil surrounding this lake, most of this run-off could be curtailed. The Gulf of Mexico has a huge dead zone, mostly caused by agricultural run-off. See: <a href="http://science.time.com/2013/06/19/this-years-gulf-of-mexico-dead-zone-could-be-the-biggest-on-record/?xid=newsletter-asia-weekly">http://science.time.com/2013/06/19/this-years-gulf-of-mexico-dead-zone-could-be-the-biggest-on-record/?xid=newsletter-asia-weekly</a><br>
<br><i>The major factor driving the size of the dead zone—beyond changing
flooding patterns—is the use and overuse of fertilizers in America’s
rich Midwestern corn belt. The U.S. Geological Survey estimated that
153,000 metric tons of nutrients flowed down the swollen Mississippi and
Atchafalaya rivers during May—a 16% increase over the nutrient load
average seen during the past 34 years. And as James Greiff of Bloomberg <a title="Gulf" href="http://www.bloomberg.com/news/print/2013-06-14/gulf-of-mexico-s-extinction-by-ethanol.html" target="_blank">points out in a recent piece</a>, those nutrients are used disproportionately to feed one particular crop: corn. What’s more, 40 percent of the U.S. corn crop is devoted to making
ethanol, which fuel companies must blend with gasoline under a
congressional mandate. The Gulf dead zone is yet another reason for
Congress to kill that mandate.</i><div style="overflow:hidden;color:rgb(0,0,0);background-color:rgb(255,255,255);text-align:left;text-decoration:none;border:medium none"><br></div></div><div class="gmail_quote">A TLUD that makes biochar and then burns it is not ideal for two reasons: 1) the burning of the biochar takes place at a considerable distance from the pot and is inefficient, and 2) there is no biochar that gets incorporated into the soil.<br>
<br></div><div class="gmail_quote">Once again, when we go about designing TLUDs, if possible, we should utilize waste biomass, not fossil fuels, and we should make biochar and incorporate it into the soil. Our focus should not be exclusively on human health. If poor people could afford fossil fuel gas, the health issue would be fully addressed. Does this mean that we would no longer have to design stoves for them?<br>
<br></div><div class="gmail_quote">And finally, should we not be using in our own kitchens the stoves that we design? Why is it OK for us to go on using fossil fuels to cook our food? Why do we conveniently shift the burden of sustainability onto poor people?<br>
</div><div class="gmail_quote"><br></div><div class="gmail_quote">Thanks.<br></div><div class="gmail_quote">Paul Olivier<br></div><div class="gmail_quote"><br><br>On Sat, Jul 6, 2013 at 3:38 AM, Dean Still <span dir="ltr"><<a href="mailto:deankstill@gmail.com" target="_blank">deankstill@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi All,<div><br></div><div>In recent discussions making stoves that reduce climate change as well as health problems has been a focus. I'm not an expert but to me that means investigating how stoves can burn as cleanly as possible. Making as close to zero amounts of CO and PM while cooking food as effectively as possible: making cooks happy as well. If the stove makes charcoal that will be buried it should be super clean when burning/cooking.</div>
<div><br></div><div>We're getting closer. Stoves with chimneys can help a lot to protect health as long as the outside air stays below WHO guidelines but adding climate change means that we want to see only carbon neutral CO2 coming out of the chimney. </div>
<div><br></div><div>I think that in the next few years biomass stoves that get close to this degree of clean burning will be for sale, available in the millions and at market prices. It's great that the Global Alliance is pushing this ' technological revolution'. And as a concerned Earthling, I want to sincerely thank all of the inventors and all concerned who are helping the plants and animals, the humans, on our planet.</div>
<div><br></div><div>Thanks to Jacob, Tom, N. Nurhuda, Ron, Fred, Peter, Ben, Paul, Tom, Larry, Ranyee, Leslie, John, Crispin, and everyone.</div><div><br></div><div>THANK YOU!!!,</div><div><br></div><div>Dean<div><div>
<br><br><div class="gmail_quote">
On Fri, Jul 5, 2013 at 10:29 AM, Frank Shields <span dir="ltr"><<a href="mailto:frank@compostlab.com" target="_blank">frank@compostlab.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
This is a very good topic and related to Stoves to the point of noting the<br>
difference of a measure of Biochar pH value and alkalinity value. The pH is<br>
really not that important as many think it is. It's the alkalinity that is<br>
important. Having a water with a pH of 8.3 takes little acid to lower the pH<br>
but toss in a chunk of lime and the pH is still 8.3 but you will need to add<br>
acid until all the lime is dissolved before the pH goes down. So pH is just<br>
a reading. Alkalinity (or neutralizing value) is a measure of the amount of<br>
buffering holding that pH. We report this as CaCO3 equivalent units so it<br>
can be compared to adding limestone to a soil. We boil a Biochar sample in<br>
100 mls of 0.5N HCl to dissolve all the carbonates and oxides in the sample<br>
then back titrate using NaOH to determine the amount buffering (or<br>
neutralizing value) the sample has. Much more useful.<br>
<br>
Frank<br>
<br>
<br>
Thanks<br>
<br>
Frank Shields<br>
<br>
BioChar Division<br>
Control Laboratories, Inc.<br>
42 Hangar Way<br>
Watsonville, CE 95076<br>
<br>
<a href="tel:%28831%29%20724-5422" value="+18317245422" target="_blank">(831) 724-5422</a> tel<br>
(81) 724-3188 fax<br>
<a href="mailto:frank@biocharlab.com" target="_blank">frank@biocharlab.com</a><br>
<a href="http://www.controllabs.com" target="_blank">www.controllabs.com</a><br>
<br>
<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: Stoves [mailto:<a href="mailto:stoves-bounces@lists.bioenergylists.org" target="_blank">stoves-bounces@lists.bioenergylists.org</a>] On Behalf Of<br>
<a href="mailto:ajheggie@gmail.com" target="_blank">ajheggie@gmail.com</a><br>
Sent: Thursday, July 04, 2013 11:47 PM<br>
To: Discussion of biomass cooking stoves<br>
Subject: Re: [Stoves] on ocean acidification<br>
<br>
On Thu, 04 Jul 2013 23:21:20 -0600,Mark Bigland-Pritchard / Low Energy<br>
Design Ltd <<a href="mailto:mark@lowenergydesign.com" target="_blank">mark@lowenergydesign.com</a>> wrote:<br>
<br>
>I wouldn't normally want to post off-topic, but I think it is necessary<br>
>that an error be corrected before this thread is put to sleep.<br>
<br>
Mark I'm happy with your correction explaining pH. As we generally do use pH<br>
to denote acidity rather than hydrogen ions I think it is misleading to then<br>
say a 30% increase in hydrogen ion activity equates to a 30% change in<br>
acidity.<br>
<br>
I think change in ocean ecology due to this small change in pH is a very<br>
serious concern but please all of you take the discussion elsewhere and<br>
stick to stove issues.<br>
<br>
AJH<br>
<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Paul A. Olivier PhD<br>26/5 Phu Dong Thien Vuong<br>Dalat<br>Vietnam<br>
<br>Louisiana telephone: 1-337-447-4124 (rings Vietnam)<br>Mobile: 090-694-1573 (in Vietnam)<br>Skype address: Xpolivier<br><a href="http://www.esrla.com/" target="_blank">http://www.esrla.com/</a>
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