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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>G’day All,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The physical/chemical/thermodynamic(?) properties of methane
mean it won’t liquefy at ambient temperatures (at any pressure!), so LNG
transport has to be refrigerated (MORE energy!). It’s a bit like nitrogen (but
does not need to be quite that cold).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>My simple engineers explanation is to look at the series of
methane, ethane, propane, butane, heptane, hexane, septane, oxane, nonane,
decane, .... (with one, two, 3, ..., 10, ... carbon atoms). The first couple are
gases at ambient temperatures, the next couple volatile liquids, then more
stable liquids then greases and eventually solids – the conclusion is the lower
the number of carbons the lower the boiling point.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Happy digesting,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>HOOROO<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Mr. Paul Harris, Room S116b, Waite Main Building Faculty of
Sciences, The University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA
5064 Ph : +61 8 8303 7880
Fax : +61 8 8303 4386 <a
href="mailto:paul.harris@adelaide.edu.au"><span style='color:blue'>mailto:paul.harris@adelaide.edu.au</span></a>
<a href="http://www.adelaide.edu.au/directory/paul.harris"><span
style='color:blue'>http://www.adelaide.edu.au/directory/paul.harris</span></a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>CRICOS Provider Number 00123M<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>This email message is intended only for the addressee(s) and
contains information that may be confidential and/or copyright. If you
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representation is made that this email or any attachments are free of viruses.
Virus scanning is recommended and is the responsibility of the recipient.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> digestion-bounces@lists.bioenergylists.org
[mailto:digestion-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Reuben
Deumling<br>
<b>Sent:</b> Wednesday, 24 November 2010 3:33 AM<br>
<b>To:</b> For Discussion of Anaerobic Digestion<br>
<b>Subject:</b> Re: [Digestion] Compressing of biogas<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Can you say a bit more about <br>
- why separating out the CO2 is ruled out? and<br>
- why if methane 'does not like to be compressed' so many other similar gases
are compressed regularly?<br>
<br>
Perhaps I'm missing something. <br>
I do appreciate the transport ideas without compression or a pipeline. <br>
<br>
Reuben Deumling<br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal>On Tue, Nov 23, 2010 at 8:58 AM, Alexander Eaton <<a
href="mailto:alex@sistemabiobolsa.com">alex@sistemabiobolsa.com</a>> wrote:<o:p></o:p></p>
<p class=MsoNormal>We go around this issue frequently, as end users often come
up with the same idea. It is hard to tell them no, so we always take a
fresh look under the circumstances. At the end of the day filtration of
CO2 i always ruled out, and that means 40% of the volume of gas you are
compressing serves no energetic purpose. Add that to the fact that
methane does not like to be compressed, and we arrive again at a "no"
response. <br>
<br>
The one option we always examine is the non-compressed transportation of large
gas reservoirs. This we have tried for distances that are too long for a
simple gas line, and short enough to be practical by cart. Since we can
make durable gas reservoirs of any size and shape, this is not
unfeasible. Once transported, the gas is connected and used as usual,
while a second reservoir is filling. If you can create value for this
use, and the transport logistics to not out-weight the value of the energy
provided, you may have an option for success. Others have used large
truck inner-tubes in the same way, that are then rolled down the street to the
end use. I suspect that in certain locations, systems that considered
low-pressure distribution could gain some traction. <br>
<br>
Saludos,<br>
<br>
A <o:p></o:p></p>
<div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal>On Tue, Nov 23, 2010 at 6:21 AM, Vianney Tumwesige <<a
href="mailto:trustvianney@gmail.com" target="_blank">trustvianney@gmail.com</a>>
wrote:<o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Hello Harold,<br>
<br>
I completely agree withYvonne, it will be economically expensive to compress
the gas.<br>
<br>
P.S. Yvonne, could you send me a copy of the paper and ppt as well? <br>
<br>
Best regards<o:p></o:p></p>
<div>
<div>
<div>
<p class=MsoNormal>On Tue, Nov 23, 2010 at 1:49 PM, Harold leffertstra <<a
href="mailto:haroldleffertstra@yahoo.no" target="_blank">haroldleffertstra@yahoo.no</a>>
wrote:<o:p></o:p></p>
</div>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;
margin-left:4.8pt;margin-right:0cm'>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>hello<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Got
a question from the owner of a small biogass plant in Tanzania.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>He
is expanding a small existing biogas plant to be able to digest waste from
200 households and manure from 100 cows. <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>He
is interested in using the biogas for fueling vehicles. In our part of the
world we think it will be necessary with cleaning, uppgrading of the
gas and compressing.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Do
any of you have experience/ideas about whether this is feasible for
such a small plant?<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>1)What
is necessary to use the biogas for fueling vehicles and 2) what are the
technical and economical consequences?<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thank
you<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Harold
Leffertstra<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Senior
Advisor<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Norwegian
Climate and Pollution Agency<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Oslo <o:p></o:p></span></p>
</div>
</td>
</tr>
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</div>
</td>
</tr>
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<p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________<br>
Digestion mailing list<br>
<br>
to Send a Message to the list, use the email address<br>
<a href="mailto:Digestion@bioenergylists.org" target="_blank">Digestion@bioenergylists.org</a><br>
<br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a
href="http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org"
target="_blank">http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org</a><br>
<br>
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>
<o:p></o:p></p>
</blockquote>
</div>
<p class=MsoNormal><span style='color:#888888'><br>
<br clear=all>
<br>
-- <br>
Vianney Tumwesige<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#888888'>Director - Green Heat (U)
Ltd </span><b><span lang=EN-US style='color:#888888'>Error! Filename not
specified.</span></b><span style='color:#888888'><br>
P.O. Box 10235<br>
Kampala-Uganda<br>
256 (0) 71 237 9889<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#888888'><br>
"The more people are self sufficient in cooking fuel, the more personal
and financial freedom they have." - Emma Casson<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#888888'><br>
<a href="http://trustvianney.wordpress.com/" target="_blank"><br>
</a><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:#888888'><br>
</span><br>
_______________________________________________<br>
Digestion mailing list<br>
<br>
to Send a Message to the list, use the email address<br>
<a href="mailto:Digestion@bioenergylists.org" target="_blank">Digestion@bioenergylists.org</a><br>
<br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a
href="http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org"
target="_blank">http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org</a><br>
<br>
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>
<o:p></o:p></p>
</div>
<p class=MsoNormal><br>
<br clear=all>
<br>
-- <o:p></o:p></p>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'>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" target="_blank">alex@irrimexico.org</a><br>
<a href="mailto:alex@sistemabiobolsa.com" target="_blank">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>
<a href="http://www.redbiolac.org" target="_blank">www.redbiolac.org</a><br>
<br>
<br>
_______________________________________________<br>
Digestion mailing list<br>
<br>
to Send a Message to the list, use the email address<br>
<a href="mailto:Digestion@bioenergylists.org">Digestion@bioenergylists.org</a><br>
<br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a
href="http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org"
target="_blank">http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org</a><br>
<br>
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>
<o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
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