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G'day Again,<br>
<br>
1. In my simple engineers approach "what goes in MUST come out
(sometime!)" - this means that nearly all the inputs appear in the
sludge, as only relatively small amounts of carbon, hydrogen and
oxygen appear in the gas stream (with traces of nitrogen, sulphur
etc.), but some grit may only be emptied in maintenance periods. You
will only get H2S with high sulphur feeds (and possibly short
retention times) and microbes can acclimate to ammonia given time
(build up the feed rate slowly!) - pH is also important. As poultry
do not have methanogens in their gut/crop/whatever you will have to
start with cow manure or some other innoculum and change gradually
to poultry manure - less problems if you can do co-feed other
materials.<br>
<br>
2. As mentioned in my other e-mail "high rate" digesters (tend to be
more complex) require more monitoring (can be automatic, but you do
still need a human or two!) and operator skill than simpler low rate
digesters.<br>
<br>
3. You would have to watch heavy metals when you spread sludge and
make sure steroids don't yield "super-bugs". Heavy metals can cause
inhibition and I am not sure about steroid effects (I was joking
about superbugs!).<br>
<br>
4. Yes, as mentioned above co-digestion may solve (or help with)
some of the problems.<br>
<br>
Hope this helps,<br>
HOOROO<br>
<br>
<div class="moz-cite-prefix">On 19/06/2013 3:12 PM, Prabhu
Govindarajan wrote:<br>
</div>
<blockquote
cite="mid:CAGQutcAXcpP0JSChdC7SONOnHp2mvEMZmQ=+w6SrHGzBY82rNg@mail.gmail.com"
type="cite">
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<div class="gmail_extra">Hi <br>
<br>
</div>
<div class="gmail_extra"> Thanks for the pointers.The question i
had in my mind when i asked this was this<br>
</div>
<div class="gmail_extra">1.Does AD design affect the manure
produced,H2S Content and ammonia inhibition?<br>
</div>
<div class="gmail_extra">2.How does it affect the operational
and process maintenance ?<br>
</div>
<div class="gmail_extra">3.As broiler manure supposed to have
lot of heavy metals and steroids should special care be taken
.<br>
</div>
<div class="gmail_extra">4.Can some kind of co-digestion solve
it ?<br>
</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">Thanks<br>
<br>
</div>
<div class="gmail_extra">Prabhu.G<br>
</div>
<div class="gmail_extra">
<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Jun 18, 2013 at 11:30 PM, <span
dir="ltr"><<a moz-do-not-send="true"
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1. Digester Selection (Prabhu Govindarajan)<br>
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----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Tue, 18 Jun 2013 11:28:33 +0530<br>
From: Prabhu Govindarajan <<a moz-do-not-send="true"
href="mailto:prabhu.govvindarajan@gmail.com">prabhu.govvindarajan@gmail.com</a>><br>
To: <a moz-do-not-send="true"
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Subject: [Digestion] Digester Selection<br>
Message-ID:<br>
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<br>
Hi<br>
I am from a south Indian State of India, TamilNadu.We
want to build a<br>
Digester for poultry manure (2-5) tons/week What would be
nice approach for<br>
the AD<br>
<br>
1.CST 3 Stage Plug Flow - CST IISC<br>
2.Nisarguna - BARC Reactor -<br>
<a moz-do-not-send="true"
href="http://www.barc.gov.in/akruti-tp/atp_nisar.html"
target="_blank">http://www.barc.gov.in/akruti-tp/atp_nisar.html</a><br>
3.CSTR<br>
4.U Shaped mixed plug flow - Some US Dairy Farms<br>
<br>
Can somebody help us with consultancy as well ?<br>
<br>
Thanks<br>
<br>
Prabhu.G<br>
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<pre wrap="">_______________________________________________
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