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<DIV><FONT size=2 face=Arial>Robin,</FONT></DIV>
<DIV><FONT size=2 face=Arial>You need to identify a few variables:</FONT></DIV>
<DIV><FONT size=2 face=Arial>Climate, Power costs, Labor costs, farm ground to
dispose of effluent, </FONT></DIV>
<DIV><FONT size=2 face=Arial>Availability of materials for construction, is
there a market for the energy you produce?</FONT></DIV>
<DIV><FONT size=2 face=Arial>Brent</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=RJones@twp.co.za href="mailto:RJones@twp.co.za">Jones, Robin
(TWP)</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=digestion@lists.bioenergylists.org
href="mailto:digestion@lists.bioenergylists.org">digestion@lists.bioenergylists.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, April 30, 2012 4:04
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Digestion] Nitrogen in
effluent</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>We are in the feasibility stage for a 3MWe
power generation plant using a bio digester (<SPAN
style="COLOR: black">Continuous Flow</SPAN>) located adjacent to cattle
feedlots.. The available feeds are tallow, cattle and chicken manure. The mass
balance indicates a very high nitrogen content in the effluent (±5000mg/ltr).
The effluent’s rate of discharge is also significant posing a very real
environmental concern. Has anyone had previous experience with similar
effluents and if so what was the strategy to mitigate environmental risk
without adding significant CAPEX, OPEX and parasitic loads.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Considering the concentration of Nitrogen, we understand
that this is not really a viable option for raw fertiliser (i.e. direct
irrigation onto crops). It is understood that this would need to be
concentrated up to reduce the volume prior to transporting to a fertiliser
production facility approximately 80km away. <o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Any comments related to this would be much appreciated.
<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<P>
<HR>
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