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<DIV><FONT size=2 face=Arial>Dear Paul</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>This is very interesting indeed... waste rice hulls
worth about $US283 per tonne for its gas energy plus biochar value!</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>It is also very interesting that
the Vietnamese will pay about $70 for about 1/3 tonne of biochar plus ash.
Say $US200 per tonne What are the specific and tangible advantages that the
Vietnamese see with rice hull biochar, such that its price of $200 per tonne is
economically justifiable? Hopefully, what they use to justify the use of biochar
can be used to justify the greater use of biochar throughout the rest of the
world.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Are there any specific advantages to Rice Hull
biochar that would not be present in biochars from other agricultural wastes
that are not as high in ash? Alternatively, is it possible that other biochar,
with much less silica ash content, would be even more economically
justifiable?</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Thanks!</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Kevin</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=paul.olivier@esrla.com href="mailto:paul.olivier@esrla.com">Paul
Olivier</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=stoves@lists.bioenergylists.org
href="mailto:stoves@lists.bioenergylists.org">Discussion of biomass cooking
stoves</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, October 12, 2011 2:32
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] High mass space
heating options Re: Rocket Stoveforthe PLACE</DIV>
<DIV><BR></DIV>See comments.<BR><BR>
<DIV class=gmail_quote>On Wed, Oct 12, 2011 at 8:30 AM, Kevin <SPAN
dir=ltr><<A
href="mailto:kchisholm@ca.inter.net">kchisholm@ca.inter.net</A>></SPAN>
wrote:<BR>
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<DIV bgcolor="#ffffff">
<DIV><FONT size=2 face=Arial>Dear Paul</FONT></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"
dir=ltr>
<DIV class=im>
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="FONT: 10pt arial; BACKGROUND: #e4e4e4"><B>From:</B> <A
title=paul.olivier@esrla.com href="mailto:paul.olivier@esrla.com"
target=_blank>Paul Olivier</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=stoves@lists.bioenergylists.org
href="mailto:stoves@lists.bioenergylists.org" target=_blank>Discussion of
biomass cooking stoves</A> </DIV></DIV>
<DIV class=im>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, October 11, 2011 9:44
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] High mass space
heating options Re: Rocket Stove forthe PLACE</DIV>
<DIV><BR></DIV></DIV>
<DIV>...del...</DIV>
<DIV class=im>
<DIV> </DIV>
<DIV>For example, one kg of rice hulls produces about $0.21 in gas but
only about $0.07 in biochar.<BR>In other words, biochar comes in at only
one third of the value of the gas.</DIV>
<DIV> </DIV></DIV>
<DIV><FONT size=2 face=Arial># Very interesting!! </FONT></DIV><FONT
size=2 face=Arial></FONT></BLOCKQUOTE>
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<DIV><FONT size=2 face=Arial>1: Does the 1.0 kG of rice hulls yield EITHER
$.21 of gas OR $.07 worth of char</FONT></DIV>
<DIV><FONT size=2 face=Arial>OR, </FONT></DIV>
<DIV><FONT size=2 face=Arial>does it yield $.21 worth of gas + $.07 of
char, total $.28 per kG?</FONT></DIV></BLOCKQUOTE></DIV></BLOCKQUOTE>
<DIV>It's not "or" but "plus".<BR>Another way to put it is one metric ton of
rice hulls is worth $283 US in gas <U>and </U>biochar.<BR><BR> </DIV>
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<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>2: What is the weight yield of biochar from 1
kG of rice hull?</FONT></DIV></BLOCKQUOTE></DIV></BLOCKQUOTE>
<DIV><BR>From 30% to 50% by weight: this depends on the rate of
gasification.<BR> <BR></DIV>
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<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>3: Are the people actually using this biochar
for agricultural purposes?</FONT></DIV></BLOCKQUOTE></DIV></BLOCKQUOTE>
<DIV><BR>Yes, it is commonly used throughout Vietnam. <BR></DIV>
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<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Thanks!!</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Kevin</FONT></DIV>
<DIV>
<DIV></DIV>
<DIV class=h5>
<DIV><BR>Biochar production therefore is a by-product of gas
production.<BR>But if the the rice hull can be obtained, as is usually the
case, free-of-charge,<BR>and if biochar can be sold at a nice
profit,<BR>then gas is produced at a negative cost.<BR>Also note that when
rice hulls are properly gasified,<BR>no smoke is produced.<BR>So in
producing gas, one earns a profit in the sale of biochar.<BR>The big
economic driver in this instance is the production of gas.<BR><BR>There
are people in Vietnam who know nothing about the value of rice hull
gas,<BR>and they are busy each day making rice hull biochar in crude
retorts.<BR>These low-temperature retorts emit clouds of smoke that can be
seen from miles around.<BR>Focusing only on biochar production, these
people do a lot of damage to the environment and should be shut
down.<BR>The biochar that they produce is anything but uniform.<BR><BR>For
more on this, see: <BR><A
href="http://dl.dropbox.com/u/22013094/Paper/park.pdf"
target=_blank>http://dl.dropbox.com/u/22013094/Paper/park.pdf</A><BR>See
the section on gasification starting on page 79.<BR>I am a big believer in
utilizing a multiplicity of approaches with regard to
biomass.<BR><BR>Thanks.<BR>Paul Olivier<BR>Vietnam<BR><BR></DIV>
<DIV class=gmail_quote>On Wed, Oct 12, 2011 at 6:40 AM, Steve Taylor <SPAN
dir=ltr><<A href="mailto:steve@thetaylorfamily.org.uk"
target=_blank>steve@thetaylorfamily.org.uk</A>></SPAN> wrote:<BR>
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class=gmail_quote><BR><BR>
<DIV class=gmail_quote>
<DIV>On 11 October 2011 17:55, Fireside Hearth <SPAN dir=ltr><<A
href="mailto:firesidehearthvashon@hotmail.com"
target=_blank>firesidehearthvashon@hotmail.com</A>></SPAN> wrote:<BR>
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class=gmail_quote>
<DIV>
<DIV dir=ltr>Dear
Steve,<BR><BR> I spent most
of my adult life teaching people how to heat their homes without smoke
coming from the chimney, when I see pictures of areas where bio char
is being made I see horrible air pollution from the
fires,<BR></DIV></DIV></BLOCKQUOTE></DIV>
<DIV><BR>I see "biochar" being used as an excuse for burning to clear
land rather than the emissions generated being considered pollution from
the process of making it. <BR><FONT color=#888888><BR>Steve
<BR></FONT></DIV></DIV>
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clear=all><BR>-- <BR>Paul A. Olivier PhD<BR>27C Pham Hong Thai
Street<BR>Dalat<BR>Vietnam<BR><BR>Louisiana telephone: 1-337-447-4124
(rings Vietnam)<BR>Mobile: 090-694-1573 (in Vietnam)<BR>Skype address:
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<P align=left color="#000000">No virus found in this message.<BR>Checked
by AVG - <A href="http://www.avg.com"
target=_blank>www.avg.com</A><BR>Version: 10.0.1410 / Virus Database:
1522/3943 - Release Date: 10/07/11</P>
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clear=all><BR>-- <BR>Paul A. Olivier PhD<BR>27C Pham Hong Thai
Street<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><BR>
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<P class=avgcert align=left color="#000000">No virus found in this
message.<BR>Checked by AVG - <A
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