<html><head><title>Re: [Digestion] Reaction Kinetics for AD</title>
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<span style=" font-family:'Verdana'; font-size: 9pt;">Hello Paul,<br>
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A basic theoretical thermodynamic calculation, using starch (C10H6O5)x as a feed stock, shows that the available energy from turning starch into methane and carbon dioxide is 884 kJ/kg. If the same starch is turned into carbon dioxide and water, the energy released is 17,371 kJ/kg. Anaerobic digestion therefore releases only 5% of the energy of aerobic digestion, which is why it does not heat up the mixture.<br>
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<span style=" font-size: 8pt; color: #31652c;"><i>-- <br>
Best regards,<br>
David<br>
</i></span></span><a style=" font-family:'verdana';" href="mailto:davidf@kingdombio.com">mailto:davidf@kingdombio.com</a><br>
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<span style=" font-family:'verdana'; color: #31652c;"><i>Tuesday, November 20, 2012, 8:43:33 AM, you wrote:<br>
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<span style=" font-family:'verdana'; font-size: 9pt;">G'day All,<br>
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How much energy is given out in the digesters as a result of anaerobic reaction? I can't seem to get any publication with enough details on this. I would like to know the temperature rise that would be caused by the reaction. <br>
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<span style=" color: #6633ff;"><b>Best Regards</b>, <br>
<br>
<br>
<b>Paul S. Muthui<br>
Research & Development Engineer<br>
Schutter Energy Ltd.<br>
P.O Box 50178 - 00100, Nairobi<br>
Tel: 0738 689 78<span style=" color: #9999ff;">8<br>
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<span style=" color: #6633ff;">Mobile: 0724 815594<br>
</span></span></b></span></span><a style=" font-family:'verdana'; font-size: 9pt;" href="mailto:paul@takamotobiogas.com">paul@takamotobiogas.com</a><br>
<a style=" font-family:'verdana'; font-size: 9pt;" href="http://www.takamotobiogas.com">www.takamotobiogas.com</a><span style=" font-family:'verdana'; font-size: 9pt;"> <br>
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<span style=" font-family:'Verdana'; font-size: 9pt;"> ********************************************************************<br>
Dr David Fulford CEnv MEI, 15, Brandon Ave, Woodley, Reading RG5 4PU<br>
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