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let me told you that the High Camp of the Huayna Potosi (6088 masl) is situated at 5200masl, and they have ask me for a digester to treat the black waters generated by the mountainers whom sleep there to climb on the morning....<div>We are considering the design of this special digester.</div><div>more news in few months... :-)</div><div><br></div><div>keep in touch</div><div>jaime</div><div><br><br>-----<br><b>Jaime Martí Herrero</b><br>
<p style="line-height:normal" class="ecxecxecxMsoNormal"><span lang="EN-US"><font size="3"><font face="Calibri"><em>Technical advisor of biogas for the GTZ-Bolivia</em></font></font></span></p>
<p style="line-height:normal" class="ecxecxecxMsoNormal"><span lang="EN-US"><font size="3"><font face="Calibri"><em>CIMNE (</em><a href="http://www.cimne.com/beegroup" target="_blank"><span style="color:windowtext;text-decoration:none;text-underline:none"><font size="3">www.cimne.com</font></span></a>)</font></font></span></p>
<p style="line-height:normal" class="ecxecxecxMsoNormal"><i><span lang="EN-US"><font size="3"><font face="Calibri">Building Energy and Environment Group</font></font></span></i></p>
<p style="line-height:normal" class="ecxecxecxMsoNormal"><i><font size="3"><font face="Calibri">International research cooperation area</font></font></i></p>
<p style="line-height:normal" class="ecxecxecxMsoNormal"><font face="Calibri"><font size="3">La Paz · Bolivia</font></font></p><font face="Calibri">
<p style="line-height:normal" class="ecxecxecxMsoNormal"><font size="3">Tel. (+591)-73 090 621</font></p>
<p style="line-height:normal" class="ecxecxecxMsoNormal"> </p></font>
<p style="line-height:normal" class="ecxecxecxMsoNormal"><br><b>BIOGAS AND BOLIVIA</b><br>-Taller Biogas Bolivia<br>http://tallerbiogas.blogspot.com<br>-Video: Biodigester installation in bolivian Altiplano<br><a href="http://es.youtube.com/watch?v=3Sl0XEN5Bgo" target="_blank">http://es.youtube.com/watch?v=3Sl0XEN5Bgo</a><br><a href="http://www.youtube.com/watch?v=Vs0JuV8WD_c" target="_blank">http://www.youtube.com/watch?v=Vs0JuV8WD_c</a></p>
<p style="line-height:normal" class="ecxecxecxMsoNormal">-Manual gratuito-Biodigestores familiares: Guía de diseño y manual de instalación<br>http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf<br></p><br><br><br><br><hr id="stopSpelling">Date: Mon, 6 Dec 2010 10:08:11 -0700<br>From: alex@sistemabiobolsa.com<br>To: digestion@lists.bioenergylists.org<br>Subject: Re: [Digestion] Solar assisted biogas plant<br><br>Ooops. No digesters on top of Huayna Potosi yet! Sorry! Today 4000 meters, tomorrow 6000 meter systems for alpineers! <br><br>A<br><br><div class="ecxgmail_quote">On Mon, Dec 6, 2010 at 9:49 AM, Jaime Marti Herrero <span dir="ltr"><<a href="mailto:tallerbiogas@hotmail.com">tallerbiogas@hotmail.com</a>></span> wrote:<br>
<blockquote class="ecxgmail_quote" style="padding-left:1ex">
<div>
Hi all!<div>6000 meter above sea level? no no... :-) we work about 4000 masl... temperature during a winter night can reach -13ºC, and frezzing temperatures are reached during almost three months per year.</div><div>Our idea has been to use local material. As Alex said, we do a greenhouse with sand bricks walls. at the botton of the digester we use local isolating material (as straw)... Using the greenhouse with sand walls and straw as isolation we keep about 20-25ºC inside the digester. And thi is enough to run the anaerobic digestion.</div>
<div>You can find in this video how we do this kind of digester for cold climates:</div><div><a href="http://es.youtube.com/watch?v=3Sl0XEN5Bgo" style="text-indent:0px ! important" target="_blank">http://es.youtube.com/watch?v=3Sl0XEN5Bgo</a></div>
<div>In tropical digesters you will find temperatures of the mud about 23-28ºC... so, if in cold climates we get 20-25ºC is a good deal.</div><div><br></div><div>About active heating systems... for us they are very expensive. To heat water and pump it throught pipes inside the digester as a heat exchange system means the cost of the pump, the cost to mantein the pump, the cost of the pipes.... for us, a simple solution has been the greenhouse with sand walls ans isolation.</div>
<div><br></div><div>For bigger digesters one can use better isolation systems, as the comercial ones used in buildings.</div><div><br></div><div>I hope this helps</div><div>Keep in touch</div><div>Jaime<br>-----<br><b>Jaime Martí Herrero</b><br>
<p style="line-height:normal"><span lang="EN-US"><font size="3"><font face="Calibri"><i>Technical advisor of biogas for the GTZ-Bolivia</i></font></font></span></p>
<p style="line-height:normal"><span lang="EN-US"><font size="3"><font face="Calibri"><i>CIMNE (</i><a href="http://www.cimne.com/beegroup" target="_blank"><span style="color:windowtext;text-decoration:none"><font size="3">www.cimne.com</font></span></a>)</font></font></span></p>
<p style="line-height:normal"><i><span lang="EN-US"><font size="3"><font face="Calibri">Building Energy and Environment Group</font></font></span></i></p>
<p style="line-height:normal"><i><font size="3"><font face="Calibri">International research cooperation area</font></font></i></p>
<p style="line-height:normal"><font face="Calibri"><font size="3">La Paz · Bolivia</font></font></p><font face="Calibri">
<p style="line-height:normal"><font size="3">Tel. (+591)-73 090 621</font></p>
<p style="line-height:normal"> </p></font>
<p style="line-height:normal"><br><b>BIOGAS AND BOLIVIA</b><br>-Taller Biogas Bolivia<br><a href="http://tallerbiogas.blogspot.com" target="_blank">http://tallerbiogas.blogspot.com</a><br>-Video: Biodigester installation in bolivian Altiplano<br>
<a href="http://es.youtube.com/watch?v=3Sl0XEN5Bgo" target="_blank">http://es.youtube.com/watch?v=3Sl0XEN5Bgo</a><br><a href="http://www.youtube.com/watch?v=Vs0JuV8WD_c" target="_blank">http://www.youtube.com/watch?v=Vs0JuV8WD_c</a></p>
<p style="line-height:normal">-Manual gratuito-Biodigestores familiares: Guía de diseño y manual de instalación<br><a href="http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf" target="_blank">http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf</a><br>
</p><br><br><br><br><hr>Date: Mon, 6 Dec 2010 09:17:09 -0700<br>From: <a href="mailto:alex@sistemabiobolsa.com">alex@sistemabiobolsa.com</a><br>To: <a href="mailto:digestion@lists.bioenergylists.org">digestion@lists.bioenergylists.org</a><br>
Subject: Re: [Digestion] Solar assisted biogas plant<div><div></div><div class="h5"><br><br>Chanakya,<br><br>Jaime Marti has had success with digesters at 6000 meters in Bolivia with really cold temperatures. He uses a very nice design of adobe walls, southern aspects, and plastic greenhouse panels to heat the digester. Our temperatures are not as cold, but we often deal will near-freezing conditions, and we are using tunnel-type greenhouse structures that have been shown to maintain temperatures 15-20 degree above ambient temperature. We have considered thermal solar heating of water, with circulation mats installed under the digester. And we have tried this with biogas heated water. Our energy balance was not that great however... <br>
<br>I have experimented with hay water running through pipes inside the digester, and I will warn you that the pipes quickly become covered in the material and begin to become "insulated" and loose their effectiveness at transferring heat (has anyone else dealt with this?). On a larger scale, I have seen good option where sludge pumps pull materials from the bottom of a digester, run the material through an external heat exchanger, and then return it the system. These use waste heat from a biogas generator. <br>
<br>Best,<br><br>A <br><br><div>On Mon, Dec 6, 2010 at 6:56 AM, Hoysall Chanakya <span dir="ltr"><<a href="mailto:chanakya@astra.iisc.ernet.in">chanakya@astra.iisc.ernet.in</a>></span> wrote:<br>
<blockquote style="padding-left:1ex">I am trying to get a few people to dream of solar assisted biogas plants<br>
for regions that may have temperatures nearer zero but are not under<br>
permafrost. Very long back I was involved with a prototype that used a<br>
solar water heated biogas plant roof (for Bangalore) and could raise the<br>
digester temperature from 16 to 28C. I am requesting list users if there<br>
is any past experience, current hope or promise for this idea of solar<br>
heated /assisted biogas plant to work in northern Europe and UK? or cite<br>
some examples that I could look up.<br>
Anaerobically!! Chanakya<br>
<br>
chanakya[ at ]<a href="http://astra.iisc.ernet.in" target="_blank">astra.iisc.ernet.in</a><br>
--<br>
Dr. Hoysall Chanakya<br>
Centre for Sustainable Technologies<br>
(Assoc. Faculty at Centre for Infrastructure, Sustainable Transport and<br>
Urban Planning (CiSTUP) and Centre for Contemporary Studies)<br>
Indian Institute of Science, Bangalore 560 012<br>
ph 91-80-2293 3046; fax-91 80 2360 0683<br>
<br>
<br>
--<br>
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for more information about digestion, see<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Alexander Eaton<br>Sistema Biobolsa<br>IRRI-Mexico<br>RedBioLAC<br><br>Mex cel: (55) 11522786<br>US cel: 970 275 4505<br><br><a href="mailto:alex@irrimexico.org">alex@irrimexico.org</a><br>
<a href="mailto:alex@sistemabiobolsa.com">alex@sistemabiobolsa.com</a><br><br><a href="http://sistemabiobolsa.com" target="_blank">sistemabiobolsa.com</a><br><a href="http://www.irrimexico.org" target="_blank">www.irrimexico.org</a><br>
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for more information about digestion, see<br>
Beginner's Guide to Biogas<br>
<a href="http://www.adelaide.edu.au/biogas/" target="_blank">http://www.adelaide.edu.au/biogas/</a><br>
and the Biogas Wiki <a href="http://biogas.wikispaces.com/" target="_blank">http://biogas.wikispaces.com/</a><br>
<br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Alexander Eaton<br>Sistema Biobolsa<br>IRRI-Mexico<br>RedBioLAC<br><br>Mex cel: (55) 11522786<br>US cel: 970 275 4505<br><br><a href="mailto:alex@irrimexico.org">alex@irrimexico.org</a><br>
<a href="mailto:alex@sistemabiobolsa.com">alex@sistemabiobolsa.com</a><br><br><a href="http://sistemabiobolsa.com" target="_blank">sistemabiobolsa.com</a><br><a href="http://www.irrimexico.org" target="_blank">www.irrimexico.org</a><br>
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and the Biogas Wiki http://biogas.wikispaces.com/</div> </body>
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