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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>G’day Marina,<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'>You can use gravity flow if the digester outlet is above the
lagoon. One of the compromises with choice of digester design is that with an
above ground digester you have to pump effluent in but can drain by gravity
compared to an in ground digester where you can load by gravity but usually
have to empty by pump (unless you have a good slope available or are using a
shallow digester design.<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'>You are right that the pressure will be close to atmospheric,
unless you do something to trap the gas.<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 202 Charles Hawker 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">mailto:paul.harris@adelaide.edu.au</a>
<a href="http://www.adelaide.edu.au/directory/paul.harris">http://www.adelaide.edu.au/directory/paul.harris</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
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<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>Marina
Solanas<br>
<b>Sent:</b> Wednesday, 18 May 2011 9:14 AM<br>
<b>To:</b> digestion@lists.bioenergylists.org<br>
<b>Subject:</b> [Digestion] digestate from the AD to the storage tank (lagoon)<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Another thing we are studying, are the possibilities of
taking out the digestate from the AD to the lagoon.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>We´d prefer not to use pumps to reduce energy consumption
and investment costs. Could we use gravity to take the substrate from the
mixing chamber to the digestor and from the digestor to the storage tank? i´m
not sure about the depth of ground water.<o:p></o:p></p>
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<p class=MsoNormal>Thanks to all!<o:p></o:p></p>
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