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<br><span style="color: rgb(42, 42, 42); line-height: 17px; background-color: rgb(255, 255, 255); ">hi vianney</span><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">just as example</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">Retention time:40 days</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">manure to be load per day: 30 kg/day</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">Ratio manure:water= 1:3 (recomended for cow manure, if it is pig manure use 1:4)</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">water to be load: 30x 3= 90 l/day</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">total load: 30+ 90=120 l/day</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">Liquid volume of digester= 120 x 40=4800 liter=4.8m3</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">% biogas volumen respect total volume= 20%</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">so the digester is 4 parts of liquid and 1 part of biogas so</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">biogas volume= 4800/4=1200 liter</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">Total digester volume=4800+1200= 6000 liter</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); "><br></div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">Yo can decide to have 20% of biogas volume , or 25%, or 50%, etc. i recomend 20%. that is enought</div><div style="line-height: 17px; background-color: rgb(255, 255, 255); "><font color="#2a2a2a">but the main iss</font><font size="2">ue is to calculate the liquid volume. after this, you can use this paper ( </font></div><h1 class="svTitle" style="border-top-width: 0px; border-right-width: 0px; border-bottom-width: 0px; border-left-width: 0px; border-style: initial; border-color: initial; border-image: initial; margin-top: 0px; margin-right: 0px; margin-bottom: 6px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; vertical-align: baseline; line-height: 1.5em; clear: both; background-color: rgb(255, 255, 255); "><font size="2" style="font-weight: normal; ">Design methodology for low cost tubular digesters <a href="http://www.sciencedirect.com/science/article/pii/S0960852411018979" style="line-height: 17px; ">http://www.sciencedirect.com/science/article/pii/S0960852411018979</a><span style="line-height: 17px; ">)</span><span style="line-height: 17px; ">to find the better dimensions for the ditch, depending the circufenre of your plastic, the angle of the ditch walls, and the % of biogas bell you want.</span></font></h1><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">i hope this helps</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">keep in touch</div><div style="line-height: 17px; color: rgb(42, 42, 42); background-color: rgb(255, 255, 255); ">jaime<br></div>-----<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>
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<p style="line-height:normal" class="ecxecxecxMsoNormal"><font face="Calibri"><font size="3">La Paz · Bolivia</font></font></p><font face="Calibri">
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<p style="line-height:normal" class="ecxecxecxMsoNormal"><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</p><p style="line-height:normal" class="ecxecxecxMsoNormal"><a href="http://www.youtube.com/watch?v=TdmJXDiqu44" target="_blank">http://www.youtube.com/watch?v=TdmJXDiqu44</a><br><a href="http://es.youtube.com/watch?v=3Sl0XEN5Bgo" target="_blank">http://es.youtube.com/watch?v=3Sl0XEN5Bgo</a><br><a href="http://es.youtube.com/watch?v=3Sl0XEN5Bgo" 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><span class="ecxApple-style-span" style="color:rgb(42, 42, 42);font-family:'Times New Roman', serif;font-size:16px;line-height:20px"><a href="http://grecdh.upc.edu/publicacions/llibres/documents/2008_jmh_guia_biodigestores.pdf" style="line-height:20px;font-weight:inherit;text-decoration:underline;color:rgb(0, 104, 207);cursor:pointer" target="_blank"><font face="Calibri,sans-serif" size="2" style="line-height:normal"><span style="line-height:19px;font-size:11pt">http://grecdh.upc.edu/publicacions/llibres/documents/2008_jmh_guia_biodigestores.pdf</span></font></a></span></p><br><br><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">From: trustvianney@gmail.com<br>Date: Mon, 30 Apr 2012 11:54:50 -0700<br>To: digestion@lists.bioenergylists.org<br>Subject: [Digestion] Sizing a flexible balloon digester<br><br><div>Guess all is well. </div><div><br></div><div><p class="ecxMsoNormal" style="margin-bottom:10pt"><b><u><span style="font-size:10pt;line-height:16px">Sizing a biogas unit</span></u></b></p><p class="ecxMsoNormal" align="left" style="text-align:left;line-height:14.25pt;background-image:initial;background-color:white">
<span style="font-size:10pt">The size of the digester, i.e. the digester volume <b>Vd</b>, is determined on the basis of the chosen retention time <b>RT</b> and the daily substrate input quantity <b>Sd</b>. For a simple digester design, the retention time should amount to at least 40 days</span></p>
<p class="ecxMsoNormal" style="margin-bottom:10pt"></p><ul><li><span style="font-size:10pt;line-height:16px">RT = retention time = 40 days</span></li><li><span style="font-size:10pt;line-height:16px">Sd = daily substrate quantity = manure plus water</span></li>
<li><span style="font-size:10pt">Volume of digester, Vd = Sd × RT</span></li></ul><BR><p class="ecxMsoNormal" style="margin-bottom:0.0001pt">The ratio <b>Vd </b>÷ <b>Vg </b>(digester volume ÷ gasholder volume) is a major factor when designing a biogas digester. For a typical agricultural biogas plant, the <b>Vd/Vg</b>-ratio amounts to somewhere between 3:1 and 10:1, with 5:1 - 6:1 occurring most frequently.</p>
<p class="ecxMsoNormal" style="margin-bottom:10pt"></p><ul><li><span style="font-size:10pt;line-height:16px"> </span><span style="font-size:10pt;line-height:16px">Volume of gas (Vg) = 1/3Vd</span></li><li><span style="font-size:10pt;line-height:16px">Total volume required = Vd + Vg</span></li>
</ul><BR><b><span style="font-size:11pt;line-height:17px;font-family:Arial,sans-serif"><div>I need to estimate the volume of the flexible balloon digester (using the above equations) which would be installed in different households. The<b style="background-color:transparent"><span style="font-size:11pt;line-height:17px;font-family:Arial,sans-serif"><div style="display:inline!important">
<div style="font-family:arial,sans-serif;font-size:13px;font-weight:normal;line-height:normal;display:inline!important"> daily feedstock, volume of biogas storage and retention time being the determinant factors. Retention time was however fixed at 40 days. </div>
</div></span></b></div><div><b style="background-color:transparent"><span style="font-size:11pt;line-height:17px;font-family:Arial,sans-serif"><div style="display:inline!important"><div style="font-family:arial,sans-serif;font-size:13px;font-weight:normal;line-height:normal;display:inline!important">
<br></div></div></span></b></div><div><b style="background-color:transparent"><span style="font-size:11pt;line-height:17px;font-family:Arial,sans-serif"><div style="display:inline!important"><div style="font-family:arial,sans-serif;font-size:13px;font-weight:normal;line-height:normal;display:inline!important">
I will be glad to get guided. </div></div></span></b></div><div><b style="background-color:transparent"><span style="font-size:11pt;line-height:17px;font-family:Arial,sans-serif"><div style="display:inline!important">
<div style="font-family:arial,sans-serif;font-size:13px;font-weight:normal;line-height:normal;display:inline!important"><br></div></div></span></b></div><div><b style="background-color:transparent"><span style="font-size:11pt;line-height:17px;font-family:Arial,sans-serif"><div style="display:inline!important">
<div style="font-family:arial,sans-serif;font-size:13px;font-weight:normal;line-height:normal;display:inline!important">Thanks in advance</div></div></span></b><b style="background-color:transparent"><span style="font-size:11pt;line-height:17px;font-family:Arial,sans-serif"><div style="display:inline!important">
<div style="font-family:arial,sans-serif;font-size:13px;font-weight:normal;line-height:normal;display:inline!important">. </div></div></span></b></div><div><div><br></div><div>Best regards,</div></div></span></b></div>
<div><br></div>-- <br>Vianney Tumwesige<br><div style="display:inline"></div><div style="display:inline"></div>Director - Green Heat (U) Ltd <img src="http://c/photos/public/AIbEiAIAAABECOv50_eundi67QEiC3ZjYXJkX3Bob3RvKigwYzZmY2VhNzIxN2U0MzAxZDgzMjIzMjQwMTIyYjc4NmIxZDIyZTVkMAEoE3_PbMYF3svhn4g5QGXXnlOrRw" alt="Picture" height="20" width="20"><br>
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