<HTML><BODY><span>Charles-<br>There's at least one small-scale digester of that size currently operating in the U.S. - at the USDA Beltsville Agricultural Research Center in Beltsville, MD. The dairy's herd size is roughly 125-130, with ~100 milking and producing manure at any given time (dry cattle are let out to pasture). The digester was built in 1994 and was constructed as a continuous stirred-tank reactor. I have tentative plans to conduct research on this digester simultaneously with a low-cost, pilot-scale digester project </span><span>operating on the same waste-stream that's </span><span>being constructed by our lab group at the University of Maryland. I don't have intimate knowledge of the USDA CSTR's history, but I can tell you what I know.<br><br>The digester was originally constructed for odor control as an upright, cylindrical concrete tank (I'm not sure enough of the designed HRT to give you information on it), and was later insulated with gunnite-coated styrofoam. It operates on mechanically screw-press separated, scraped waste, and utilizes the biogas produced to power a boiler that circulates hot water through a conveyance system installed within the digester for heating; a combined heat and power electric generator was installed in the mid-2000s, but it has never been brought online. The digester's had a number of problems come up, including repeated clogging of the supply lines (originally 3-4" ID, now 6"), the break down of the screw-press separator and supply pumps, and the corrosion of the boiler due to inadequate scrubbing. To be fair, many of the problems associated with the digester are the result of fluctuating research interest, funds, management, and the lack of an effective biogas scrubbing system, but they exist all the same. Currently, the digester is up and operating... although obviously not ideally.<br><br>Although most of the digestion systems are covered lagoons, the <a href="http://epa.gov/agstar/projects/index.html">AgSTAR website<u></u></a> contains a link to a Excel file detailing the digesters currently registered in the EPA's system (look under "Farm Project Profiles"). A few of them approximate the herd numbers you're interested in.<br><br>As a side note, our research at the University of Maryland, together with research at Ohio State and the University of Wisconsin, is attempting to introduce smaller-scale, lower-cost systems in the U.S. I gave a presentation in October on small-scale digestion and some of the current efforts that you can find <a href="http://www.jgpress.com/biocycleenergy/pres_tue/Moss_bcre10_s.pdf">here</a>.<br><br>Good luck hunting!<br><br>-Andy <br>
<div class="mirapoint-signature">
<pre>Andrew R. Moss
Sustainable Agriculture Research & Education Fellow
University of Maryland Dept. of Environmental Science and Technology
1445 Animal Sci./Ag. Engineering (Bldg. 142)
University of Maryland, College Park, MD 20742
Phone: (865) 363-5535
</pre>
</div>
</span><br>
---- Original message ----<br><blockquote style="padding-left: 5px; margin-left: 5px; border-left: 2px solid rgb(0, 0, 255);"><b>Date:</b> Wed, 12 Jan 2011 12:00:06 -0800<br><b>From:</b> <digestion-request@lists.bioenergylists.org><br><b>Subject:</b> Digestion Digest, Vol 5, Issue 5<br><b>To:</b> <digestion@lists.bioenergylists.org><br><br>>Send Digestion mailing list submissions to<br>> digestion@lists.bioenergylists.org<br>><br>>To subscribe or unsubscribe via the World Wide Web, visit<br>> http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org<br>><br>>or, via email, send a message with subject or body 'help' to<br>> digestion-request@lists.bioenergylists.org<br>><br>>You can reach the person managing the list at<br>> digestion-owner@lists.bioenergylists.org<br>><br>>When replying, please edit your Subject line so it is more specific<br>>than "Re: Contents of Digestion digest..."<br>>________________
>Today's Topics:
>
> 1. Small Digester and Rankine Engine Questions (Gould, Merrill)
> 2. Re: 250kW hot water biogas boiler (Ian Bywater)
> 3. Re: Small Digester and Rankin Engine Questions (Randy Mott)
> 4. Re: Small Digester and Rankin Engine Questions (Sam Wampler)
> 5. Re: Small Digester and Rankine Engine Questions (David Fulford)
>________________
>Date: Tue, 11 Jan 2011 17:07:41 +0000
>From: "Gould, Merrill" <gouldm@anr.msu.edu>
>Subject: [Digestion] Small Digester and Rankine Engine Questions
>To: "digestion@lists.bioenergylists.org" <digestion@lists.bioenergylists.org>
>
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<p class="MsoNormal">Greetings:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have two questions I am hoping someone has answers for:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span style="" target="_blank">1.<span style="font: 7pt "Times New Roman";" target="_blank">
</span></span><!--[endif]-->Are there small farms with digesters in the United States? When I say small farm I don’t mean 2-3 cows, I mean a farm with around 125 dairy cows, which is the average herd size in Michigan. If so, where are they and what has been their
experience with their digester? I suspect there probably are no small farms with digesters in the US, but I would really like to know. I have had numerous inquiries from farmers with small farms in West Michigan about putting in a digester on their farm. If
my assumption is correct that there are no small farms with digesters, are there farms with comparable numbers of dairy cattle with digesters outside of the United State? If so, where are they and what has their experience been with their digester?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span style="" target="_blank">2.<span style="font: 7pt "Times New Roman";" target="_blank">
</span></span><!--[endif]-->Has anyone had experience using a Rankine engine as part of an energy producing system?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance for any insight you can provide me.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Charles Gould<o:p></o:p></p>
<p class="MsoNormal">Michigan State University Extension<o:p></o:p></p>
<p class="MsoNormal">West Olive, Michigan<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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>________________
>Date: Fri, 7 Jan 2011 20:51:07 +1300
>From: Ian Bywater <ian.bywater@naturalsystems.co.nz>
>Subject: Re: [Digestion] 250kW hot water biogas boiler
>To: For Discussion of Anaerobic Digestion <digestion@lists.bioenergylists.org>
>
<br>
<xbas href="x-msg://149/"><xbod style="word-wrap: break-word;">Hi Edward,<div><br></div><div>I know a boiler expert here in Christchurch, New Zealand that I'm sure has the right expertise and can help.</div><div><br></div><div>Ian Bywater<br><div><div>On 7/01/2011, at 8:42 PM, Edward Matos wrote:</div><br><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; font-size: medium;" target="_blank"><div link="blue" vlink="purple" target="_blank" lang="EN-GB"><div class="WordSection1" style="page: WordSection1;" target="_blank"><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri,sans-serif;" target="_blank">A milk processing company in our vicinity (Tanga, Tanzania) has had a lasting interest in converting its milk pasteurising process from running on propane to running on biogas. I am doing them a little favour by helping them to make a feasibility study and find the right people that will make this happen. Unfortunately I have very little experience in biogas combustion and would like to find out if anyone here is/knows someone who could help us on this subject.<o:p></o:p></div></div></div></div></span></blockquote></div></div><br><div apple-content-edited="true" target="_blank">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; font-size: medium;" target="_blank"><span class="Apple-style-span" style="font-size: 12px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; font-size: medium;" target="_blank"><span class="Apple-style-span" style="font-size: 12px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><div style="word-wrap: break-word;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; 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font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><p style="margin: 0px;">_________________</p><p style="margin: 0px;">Director, Natural Systems Limited</p><p style="margin: 0px;">(Unit 5B/ 3 Settlers Crescent)<font style="font: 12px Helvetica;" face="Helvetica" size="3"></font></p><p style="margin: 0px;"><font style="font: 12px Helvetica;" face="Helvetica" size="3">PO Box 41032</font></p><p style="margin: 0px;"><font style="font: 12px Helvetica;" face="Helvetica" size="3">Christchurch 8247</font></p><p style="margin: 0px;"><font style="font: 12px Helvetica;" face="Helvetica" size="3">New Zealand</font></p></span></span><br class="Apple-interchange-newline"><span></span></span><span><img id="0709b3df-a13f-4e76-9136-36e88581ab16" apple-width="yes" apple-height="yes" src="cid:4280EC3B-9D12-4889-939C-764AC795F30B@gateway.2wire.net" height="80" width="80"></span><span class="Apple-style-span" style="border-collapse: separate; 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font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;" target="_blank"><p style="margin: 0px;"><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">T +64(0)3<font class="Apple-style-span" face="Arial" size="4"><span class="Apple-style-span" style="font-size: 13.3px;" target="_blank"><span class="Apple-converted-space" target="_blank"> </span>376 5549</span></font></p><div style="margin: 0px;" target="_blank">M +64(0)27 579 6333</div><div style="margin: 0px;" target="_blank">F +64(0)3 365 4146</div><div style="margin: 0px;" target="_blank">S bywateri</div><div style="margin: 0px;" target="_blank">W <a href="http://www.naturalsystems.co.nz" target="_blank">www.naturalsystems.co.nz</a></div><div style="margin: 0px;" target="_blank">The Most Exciting Green Technology Company in New Zealand (NBR 2008)</div><div style="margin: 0px;" target="_blank">Bayer Innovators Award finalist, 2010, Agriculture and Environment category</div></span>NZ patent 530362<br class="Apple-interchange-newline"></span></span></span></span></span></span></span></span></span></span></span></div><div style="word-wrap: break-word;" target="_blank"><font class="Apple-style-span" color="#317d12" size="7"><span class="Apple-style-span" style="font-size: 32px;" target="_blank"><b><br></b></span></font></div></span></span><br class="Apple-interchange-newline"></span></span><br class="Apple-interchange-newline">
</span></span></span></span></span></span></span></span></span></div>
</span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></span></span></span></span></div><br></xbod>>________________
>Date: Wed, 12 Jan 2011 08:50:57 +0100
>From: "Randy Mott" <randymott@ceeres.eu>
>Subject: Re: [Digestion] Small Digester and Rankin Engine Questions
>To: "'For Discussion of Anaerobic Digestion'" <digestion@lists.bioenergylists.org>
>
<br>
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</o:shapelayout></xml><![endif]--><xbod link="blue" vlink="purple" lang="EN-US"><div class="WordSection1" target="_blank"><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">We don’t do projects in the US, but my understanding is that 500 cows is a rule of thumb. I have some literature….<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">On Rankin cycle engines, we have followed it closely in Europe and the US. There is about 15% more electricity that can come from the heat exhaust of the initial generators. The capex is about 1250 Euro/kW. We don’t have much incentive to do it in Poland since we sell the heat and also obtain a co-generation certificate for each MWe. <o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">GE Jenbacher is doing some development in Europe and eventually, I believe, will be trying to offer this as an option on its generators.<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">Randy Mott<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">CEERES<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">Warsaw<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"> <o:p></o:p></span></p><div><div style="border-right: medium none; border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;" target="_blank"><p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" target="_blank">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" target="_blank"> digestion-bounces@lists.bioenergylists.org [mailto:digestion-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Gould, Merrill<br><b>Sent:</b> Tuesday, January 11, 2011 6:08 PM<br><b>To:</b> digestion@lists.bioenergylists.org<br><b>Subject:</b> [Digestion] Small Digester and Rankine Engine Questions<o:p></o:p></span></p></div></div><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Greetings:<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I have two questions I am hoping someone has answers for:<o:p></o:p></p><p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span style="" target="_blank">1.<span style="font: 7pt "Times New Roman";" target="_blank"> </span></span><!--[endif]-->Are there small farms with digesters in the United States? When I say small farm I don’t mean 2-3 cows, I mean a farm with around 125 dairy cows, which is the average herd size in Michigan. If so, where are they and what has been their experience with their digester? I suspect there probably are no small farms with digesters in the US, but I would really like to know. I have had numerous inquiries from farmers with small farms in West Michigan about putting in a digester on their farm. If my assumption is correct that there are no small farms with digesters, are there farms with comparable numbers of dairy cattle with digesters outside of the United State? If so, where are they and what has their experience been with their digester?<o:p></o:p></p><p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span style="" target="_blank">2.<span style="font: 7pt "Times New Roman";" target="_blank"> </span></span><!--[endif]-->Has anyone had experience using a Rankine engine as part of an energy producing system?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Thanks in advance for any insight you can provide me.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Charles Gould<o:p></o:p></p><p class="MsoNormal">Michigan State University Extension<o:p></o:p></p><p class="MsoNormal">West Olive, Michigan<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p></div></xbod>>________________
>Date: Wed, 12 Jan 2011 05:20:28 -0800
>From: Sam Wampler <smwampler@avatarenergy.com>
>Subject: Re: [Digestion] Small Digester and Rankin Engine Questions
>To: For Discussion of Anaerobic Digestion <digestion@lists.bioenergylists.org>
>
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</o:shapelayout></xml><![endif]--><xbod link="blue" vlink="purple" lang="EN-US"><div class="WordSection1" target="_blank"><p class="MsoNormal"><a name="_MailEndCompose" target="_blank"><span style="color: rgb(31, 73, 125);" target="_blank">Nick,<o:p></o:p></span></a></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">Why don’t you have Kevin answer the below question about a small digester.<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">Sam<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><div><table class="MsoNormalTable" style="width: 30.52%;" target="_blank" border="0" cellpadding="0" width="30%"><tbody><tr><td style="padding: 0.75pt;" target="_blank"><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><img id="_x0000_i1030" src="cid:image001.gif@01CBB231.90166700" alt="Description: http://www.avatarenergy.com/images/logos/sam.GIF" height="27" width="118"></span><span style="font-size: 12pt; color: rgb(31, 73, 125);" target="_blank"><o:p></o:p></span></p></td></tr><tr><td style="padding: 0.75pt;" target="_blank"><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><img id="_x0000_i1029" src="cid:image002.gif@01CBB231.90166700" alt="Description: http://www.avatarenergy.com/images/logos/emaillogo.gif" height="25" width="139"></span><span style="font-size: 12pt; color: rgb(31, 73, 125);" target="_blank"><o:p></o:p></span></p></td></tr><tr><td style="padding: 0.75pt;" target="_blank"><p class="MsoNormal"><a href="mailto:smwampler@avatarenergy.com" target="_blank"><span style="font-size: 9pt; font-family: "Cambria","serif"; color: black; text-decoration: none;" target="_blank"><img id="_x0000_i1028" src="cid:image003.gif@01CBB231.90166700" alt="Description: http://www.avatarenergy.com/images/logos/email_icon.gif" border="0" height="10" width="15"></span><span style="font-size: 9pt; font-family: "Cambria","serif"; color: black; text-decoration: none;" target="_blank"> </span></a><a href="mailto:smwampler@avatarenergy.com" target="_blank"><span style="font-size: 9pt; font-family: "Cambria","serif"; color: black;" target="_blank">smwampler@avatarenergy.com</span></a><span style="font-size: 9pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank"> </span><span style="font-size: 12pt; color: rgb(31, 73, 125);" target="_blank"><o:p></o:p></span></p></td></tr><tr><td style="padding: 0.75pt;" target="_blank"><p class="MsoNormal"><a href="http://www.avatarenergy.com" target="_blank"><span style="font-size: 9pt; font-family: "Cambria","serif"; color: black; text-decoration: none;" target="_blank"><img id="_x0000_i1027" src="cid:image004.gif@01CBB231.90166700" alt="Description: http://www.avatarenergy.com/images/logos/web_icon.gif" border="0" height="14" width="15"></span><span style="font-size: 9pt; font-family: "Cambria","serif"; color: black; text-decoration: none;" target="_blank"> </span><span style="font-size: 9pt; font-family: "Cambria","serif"; color: black;" target="_blank">www.avatarenergy.com</span></a><span style="font-size: 9pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank"> </span><span style="font-size: 12pt; color: rgb(31, 73, 125);" target="_blank"><o:p></o:p></span></p></td></tr><tr><td style="padding: 0.75pt;" target="_blank"><p class="MsoNormal"><span style="font-size: 9pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank"><img id="_x0000_i1026" src="cid:image005.gif@01CBB231.90166700" alt="Description: http://www.avatarenergy.com/images/logos/cell_icon.gif" border="0" height="10" width="18"></span><span style="font-size: 9pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank">336.446.9305 (Google Voice)</span><span style="font-size: 12pt; color: rgb(31, 73, 125);" target="_blank"><o:p></o:p></span></p></td></tr><tr><td style="padding: 0.75pt;" target="_blank"><p class="MsoNormal"><span style="font-size: 9pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank"><img id="_x0000_i1025" src="cid:image005.gif@01CBB231.90166700" alt="Description: http://www.avatarenergy.com/images/logos/cell_icon.gif" border="0" height="10" width="18"></span><span style="font-size: 9pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank">336.824.1389 (fax)</span><span style="font-size: 12pt; color: rgb(31, 73, 125);" target="_blank"><o:p></o:p></span></p></td></tr></tbody></table><p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Cambria","serif"; color: rgb(31, 73, 125);" target="_blank">Confidential Information<br>The information contained in this email message is intended only for the personal and confidential use of the recipient(s) named above. This message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by email, and delete the original message.</span><span style="color: rgb(31, 73, 125);" target="_blank"><br> <o:p></o:p></span></p></div><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><div><div style="border-right: medium none; border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;" target="_blank"><p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" target="_blank">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" target="_blank"> digestion-bounces@lists.bioenergylists.org [mailto:digestion-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Randy Mott<br><b>Sent:</b> Wednesday, January 12, 2011 2:51 AM<br><b>To:</b> 'For Discussion of Anaerobic Digestion'<br><b>Subject:</b> Re: [Digestion] Small Digester and Rankin Engine Questions<o:p></o:p></span></p></div></div><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">We don’t do projects in the US, but my understanding is that 500 cows is a rule of thumb. I have some literature….<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">On Rankin cycle engines, we have followed it closely in Europe and the US. There is about 15% more electricity that can come from the heat exhaust of the initial generators. The capex is about 1250 Euro/kW. We don’t have much incentive to do it in Poland since we sell the heat and also obtain a co-generation certificate for each MWe. <o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">GE Jenbacher is doing some development in Europe and eventually, I believe, will be trying to offer this as an option on its generators.<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">Randy Mott<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">CEERES<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank">Warsaw<o:p></o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);" target="_blank"><o:p> </o:p></span></p><div><div style="border-right: medium none; border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;" target="_blank"><p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" target="_blank">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" target="_blank"> digestion-bounces@lists.bioenergylists.org [mailto:digestion-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Gould, Merrill<br><b>Sent:</b> Tuesday, January 11, 2011 6:08 PM<br><b>To:</b> digestion@lists.bioenergylists.org<br><b>Subject:</b> [Digestion] Small Digester and Rankine Engine Questions<o:p></o:p></span></p></div></div><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Greetings:<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I have two questions I am hoping someone has answers for:<o:p></o:p></p><p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span style="" target="_blank">1.<span style="font: 7pt "Times New Roman";" target="_blank"> </span></span><!--[endif]-->Are there small farms with digesters in the United States? When I say small farm I don’t mean 2-3 cows, I mean a farm with around 125 dairy cows, which is the average herd size in Michigan. If so, where are they and what has been their experience with their digester? I suspect there probably are no small farms with digesters in the US, but I would really like to know. I have had numerous inquiries from farmers with small farms in West Michigan about putting in a digester on their farm. If my assumption is correct that there are no small farms with digesters, are there farms with comparable numbers of dairy cattle with digesters outside of the United State? If so, where are they and what has their experience been with their digester?<o:p></o:p></p><p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span style="" target="_blank">2.<span style="font: 7pt "Times New Roman";" target="_blank"> </span></span><!--[endif]-->Has anyone had experience using a Rankine engine as part of an energy producing system?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Thanks in advance for any insight you can provide me.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Charles Gould<o:p></o:p></p><p class="MsoNormal">Michigan State University Extension<o:p></o:p></p><p class="MsoNormal">West Olive, Michigan<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p></div></xbod>>________________
>Date: Wed, 12 Jan 2011 16:22:12 +0000
>From: David Fulford <davidf@kingdombio.com>
>Subject: Re: [Digestion] Small Digester and Rankine Engine Questions
>To: For Discussion of Anaerobic Digestion <digestion@lists.bioenergylists.org>
>Cc: "Gould, Merrill" <gouldm@anr.msu.edu>
>
<br>
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Charles and listers,<br>
<br>
The best source of information on AD in USA is the AgSTAR project
run by EPA (<a href="http://www.epa.gov/agstar/" target="_blank">www.epa.gov/agstar/</a>).
They have a database of digesters, which includes a few small ones.
<br>
<br>
They point to the Minnesota Project (<a href="http://www.mnproject.org/index.html" target="_blank">www.mnproject.org</a>)
which is trying to concentrate on biogas for small farms (125 cattle
or less).<br>
<br>
Regards,<br>
<br>
David F<br>
<br>
On 11/01/2011 17:07, Gould, Merrill wrote:
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<p class="MsoNormal">Greetings:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have two questions I am hoping someone
has answers for:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span style="" target="_blank">1.<span style="" target="_blank">
</span></span><!--[endif]-->Are there small farms with
digesters in the United States? When I say small farm I don’t
mean 2-3 cows, I mean a farm with around 125 dairy cows, which
is the average herd size in Michigan. If so, where are they
and what has been their experience with their digester? I
suspect there probably are no small farms with digesters in
the US, but I would really like to know. I have had numerous
inquiries from farmers with small farms in West Michigan about
putting in a digester on their farm. If my assumption is
correct that there are no small farms with digesters, are
there farms with comparable numbers of dairy cattle with
digesters outside of the United State? If so, where are they
and what has their experience been with their digester?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span style="" target="_blank">2.<span style="" target="_blank">
</span></span><!--[endif]-->Has anyone had experience using
a Rankine engine as part of an energy producing system?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance for any insight you can
provide me.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Charles Gould<o:p></o:p></p>
<p class="MsoNormal">Michigan State University Extension<o:p></o:p></p>
<p class="MsoNormal">West Olive, Michigan<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<pre wrap=""><fieldset class="mimeAttachmentHeader"></fieldset>
_______________________________________________
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for more information about digestion, see
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<div class="moz-signature" target="_blank">-- <br>
<p align="center">********************************************************************<br>
Dr David Fulford CEnv MEI, 15, Brandon Ave, Woodley, Reading RG5
4PU <br>
<a href="mailto:d.j.fulford@btinternet.com" target="_blank">d.j.fulford@btinternet.com</a>,
Tel: +44(0)118 326 9779 Mob: +44(0)7746 806401 <br>
Kingdom Bioenergy Ltd, <a href="http://www.kingdombio.com" target="_blank">www.kingdombio.com</a>,
<a href="mailto:davidf@kindombio.com" target="_blank">davidf@kindombio.com</a> </p>
</div>
</xbod>
>________________
>_______________________________________________
>Digestion mailing list
>
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>
>to UNSUBSCRIBE or Change your List Settings use the web page
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>
>for more information about digestion, see
>Beginner's Guide to Biogas
>http://www.adelaide.edu.au/biogas/
>and the Biogas Wiki http://biogas.wikispaces.com/
>
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