<br>Dear David,<br><br>I worked for about a month on elephant dung. This project is not related to study of biogas yields but for developing a suitable culture of decomposing microbes at farm level conditions. As elephant is a non ruminant, the dung is full of fibers with little mositure. It is almost like a ball of fibres with little moisture. If I rember correct it has 50 to 60% moisture because when I pressed it there is not water but for moisture.<br>
<br>I think you need to add nitrogenous material to balance carbon:nitrogen ratio. It is bound to yield higher amount of gas than cattle manure. You can follow the same type of anaerobic digestion that you usually apply to grass clippings, green corn stems, etc. Mascerate it to fine particles, balance C:N and put into the digester. Alternatively increase SRT in the digester with a conical bottom with a grit evacuation chamber. There should not be any problem at all.<br>
<br>Please keep the digestion list posted with your results.<br><br>Regards and best wishes,<br><br>Krishna.<br>:<br><br><div class="gmail_quote">On Fri, May 18, 2012 at 9:16 PM, David <span dir="ltr"><<a href="mailto:david@h4c.org" target="_blank">david@h4c.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<font face="Georgia"><br>
Alex,<br>
</font><div class="im"><br>
On 5/17/2012 8:22 PM, Alexander Eaton wrote:
<blockquote type="cite">Any data or thoughts on this? We are doing a really
cool zoo project, and we will be testing a number of animal
wastes, one being Elefant (hippo also included).
</blockquote>
<br></div>
Work has been done on this by researchers working at the Toronto,
Denver and Portland OR zoos, among others.<br>
<br>
I know of at least three freely available papers that bear (pun
intended) on the issue (as previously):<br>
<br>
<blockquote>
<blockquote>“Energy Production from Zoo Animal Wastes”, Klasson
and Nghiem, 2003 (poster <a href="http://www.ornl.gov/sci/eere/PDFs/Zoodoopost.pdf" target="_blank">here</a>,
paper <a href="http://www.rhinoresourcecenter.com/pdf_files/123/1238059703.pdf" target="_blank">here</a>)<br>
<br>
"Biogas from elephant dung: a means of mitigating human-elephant
conflict", Wijeyamohan (<a href="http://www.asesg.org/PDFfiles/Gajah/22-62-Wijeyamohan.pdf" target="_blank">here</a>)<br>
<br>
"Biogas as Renewable Energy from Organic Wastes", Karki et al (<a href="http://www.eolss.net/Sample-Chapters/C17/E6-58-09-10.pdf" target="_blank">here</a>)<br>
</blockquote>
</blockquote>
<br>
And another, hard to find on-line:<br>
<br>
<blockquote>
<blockquote>
"Biogas Production from Elephant Dung at the National Elephant
Institute Project", by The National Elephant Institute
(Thailand)<span class="HOEnZb"><font color="#888888"><br>
</font></span></blockquote><span class="HOEnZb"><font color="#888888">
</font></span></blockquote><span class="HOEnZb"><font color="#888888">
<br>
d.<br>
<br>
<br>
<br>
<div>-- <br>
<div style="font:Georgia"><span style="font-size:110%">David
William House<br>
</span>
<div style="padding-left:3em;font-size:80%">"The Complete
Biogas Handbook" <code><a href="http://www.completebiogas.com" target="_blank">www.completebiogas.com</a></code><br>
<i>Vahid Biogas</i>, an alternative energy consultancy <code><a href="http://www.vahidbiogas.com" target="_blank">www.vahidbiogas.com</a><br>
<br>
</code></div>
<code>
<div style="padding-left:2em">"Make no search for water.
But find thirst,<br>
And water from the very ground will burst."
<div style="padding-left:2em;font-size:80%">(Rumi, a
Persian mystic poet, quoted in <i>Delight of Hearts</i>,
p. 77) <br>
<br>
<a href="http://bahai.us/" target="_blank">http://bahai.us/</a></div>
</div>
</code></div>
</div>
</font></span></div>
<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>
<br></blockquote></div><br><br clear="all"><br>-- <br><span style="color:rgb(0,0,102);font-family:comic sans ms,sans-serif">Regards.<br><br>Murali Krishna<br>Chairman<br>Hyderabad, Andhra Pradesh, India.</span><br style="color:rgb(0,0,102);font-family:comic sans ms,sans-serif">
<span style="color:rgb(0,0,102);font-family:comic sans ms,sans-serif">Ph:+91-40-24339999, 24333333,243355555, 24333555</span><br style="color:rgb(0,0,102);font-family:comic sans ms,sans-serif"><span style="color:rgb(0,0,102);font-family:verdana,sans-serif"><a style="font-family:comic sans ms,sans-serif" href="http://www.villagevisionindia.com" target="_blank">www.villagevisionindia.com</a><br>
</span><b><span style="color:rgb(0,0,102);font-family:verdana,sans-serif"><br><br></span></b><div style="text-align:center"><div style="text-align:center"><b><span style="color:rgb(0,0,102);font-family:verdana,sans-serif"> <br>
</span></b><div><font size="1"><b><font style="color:rgb(255,0,0);background-color:rgb(255,255,255)"><i><font style="font-family:georgia,serif" face="georgia, bookman old style, palatino linotype, book antiqua, palatino, trebuchet ms, helvetica, garamond, sans-serif, arial, verdana, avante garde, century gothic, comic sans ms, times, times new roman, serif"></font></i></font></b></font></div>
<b><br style="color:rgb(255,0,0)"></b><div><b><span style="color:rgb(255,0,0)">
</span></b><h1 style="color:rgb(0,204,204);font-weight:normal"><b><font style="font-family:comic sans ms,sans-serif;color:rgb(255,0,0)" size="2">Never put water down the drain when there may be another use for it</font></b><br>
</h1><h1 style="color:rgb(255,0,0);font-weight:normal"><font><b>Save the Environment</b></font></h1>
<h1 style="font-family:comic sans ms,sans-serif;color:rgb(153,0,0)"><br></h1></div><br></div></div><b><br></b><br>