<div dir="ltr">Dr. Karve,<div><br></div><div style>You have held this stance in many past posts, comparing starch to waste, and arguing waste as not an ideal feedstock for AD. I have always thought that your point is valid, but a bit academic and missing the fact that AD systems can be seen as an extension of the animal digestive system, treating waste further and extracting energy that has not been used. Clearly starch creates more gas, but the questions posed here is not about choosing starch or animal dung for a digester, it is about whether a zoo would be wise to consider a digester to treat animal waste and recover energy. Is dedicating space and time at a zoo to dehydrating animal dung and then developing a system to burn it and recover the energy really a better alternative than an AD system? >From an energy and process balance, can you explain a system that would perform better than a digester in this context? </div>
<div style><br></div><div style>Best, </div><div style><br>A</div><div style><br></div><div style> </div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jun 27, 2013 at 2:28 PM, Anand Karve <span dir="ltr"><<a href="mailto:adkarve@gmail.com" target="_blank">adkarve@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>Dear Rabin,</div>
<div>all animals, including humans, function as live biogas plants. The fecal matter represents slurry coming out of a biogas plant. Using animal dung as feedstock in a biogas plant is a highly inefficient way of producing biogas. You get about 800 litres biogas from just 1 kg starch. To get the same amount of biogas from cattle dung, you need 40 kg of it. One gets much more energy from dung if it can be dehydrated and burned directly<br>
Yours</div>
<div>A.D.Karve<br></div>
<div class="gmail_quote"><div><div class="h5">On Wed, Jun 26, 2013 at 11:35 AM, Rabin Shrestha <span dir="ltr"><<a href="mailto:rshrestha@winrock.org.np" target="_blank">rshrestha@winrock.org.np</a>></span> wrote:<br>
</div></div><blockquote style="BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex" class="gmail_quote"><div><div class="h5">
<div lang="EN-US" vlink="purple" link="blue">
<div>
<p class="MsoNormal">Hello,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Will it be a good idea to install biogas plant at zoo to manage and generate energy from the animal waste in the zoo???<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Regards,<u></u><u></u></p>
<p class="MsoNormal">Rabin<u></u><u></u></p></div></div><br></div></div><div class="im">_______________________________________________<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><br></div></blockquote></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><br>-- <br>***<br>Dr. A.D. Karve<br>Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)<br><br>
</font></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">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"><div><br></div>-- <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" 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>
</div>