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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear Wayne,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The best (cheapest and most reliable) system
to use for algal production is a shallow high rate algal oxidation ponds (HRAP),
usually in sets of 60 x 8m with a very slow moving paddle wheel (see attached) Typically
betseen 10 to 35cm deep depending on the the turbidity of the effluent (usually
a function of COD). If you are using 8 to 10 % solids you will need a good
settling tank before the high rate algal pond. If you are using sewage
wastewater with minimal solids its best to use a facultative pond with at least
a 10 day retention time where the effluent is introduced at at least 1.5 m deep
to avoid the smells (the anoxic algae will grow in this pond). The effluent
from this pond should be taken at least1 meter below the surface to avoid
contamination of the high rate algal pond. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>With a paddle wheel in operation, the algal
strains produced in the HRAP are not problematic and can be used for
aquaculture feed. Tilapia and marron are a good combination. Also the nutrient
rich highly oxygenated effluent form the algal ponds will lead to the production
of zooplankton which is a good aquaculture feed. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Best Wishes <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Mark<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
digestion-bounces@lists.bioenergylists.org
[mailto:digestion-bounces@lists.bioenergylists.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Wayne Zschech<br>
<b><span style='font-weight:bold'>Sent:</span></b> 14 October 2011 07:53 AM<br>
<b><span style='font-weight:bold'>To:</span></b>
digestion@lists.bioenergylists.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Digestion] Growing Algae
from biogas CO2 and digestate liquor</span></font><span lang=EN-US><o:p></o:p></span></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>G'day
all,<br>
<br>
Can someone point me in the right direction about how to set up biogas (CO2),
CHP heat and digestate liquor for algae growing? I am also looking for
info on easy to grow, fast growing algae strains that we can use as animal/fish
feed or other easily useable/sellable products. </span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>Biogas
isn’t really well known in <st1:country-region w:st="on"><st1:place w:st="on">Ukraine</st1:place></st1:country-region>.
I would really like to show people visiting my test digester how biogas
technology can be integrated into other useful areas. We're thinking that
a little green house next to thr reactor with algae and a fish tank would be an
interesting proof of concept.</span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>Where
can I find information on what nutrients are in the liquor from different
feedstocks? And which algae would grow on them best would also be appreciated.
Also what of obstacles or limiting factors can I expect to encounter? </span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>Biogas
feedstock will be mainly restaurant food waste. We have access also to pig
manure and grass clippings and green waste. <br>
<br>
Blessings,<br>
<st1:City w:st="on"><st1:place w:st="on">Wayne</st1:place></st1:City></span><o:p></o:p></font></p>
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