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Markus,<br>
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On 10/28/2010 11:48 AM, Markus Schlattmann wrote:
<blockquote cite="mid:4CC9C591.1060603@schlattmann.de" type="cite">
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HI David,<br>
<br>
<blockquote cite="mid:4CC9A353.4000307@h4c.org" type="cite"> I
would venture a guess that where the inlet air is being forced
in [to the batch container] by bubbling through water, and the
outlet air likewise is allowed to escape by bubbling through
water, then the only place in the system where there would be
both a potentially explosive gas mixture and the potential of a
spark would be at the evacuation point of the exiting gas
mixture. Where sufficient air is blown over the water through
which the evacuating air is exiting, then the risk of any
explosion would, I would think, be very close to zero.<br>
<br>
</blockquote>
Just for some additional explaintation: Those garage systems have
just one door whichs seperates the digesting room from the
atmosphere. So you need to open the door to get the old material
out of the system and put in the new material. Existing methane
from the last digestion process may get in mixture of air oxygen
during this process. I think this is the problem Yvonne is
wondering about.<br>
</blockquote>
<br>
Yes, as she said: like Bekon
(<a class="moz-txt-link-freetext" href="http://www.bekon-energy.de/englisch.htm:">http://www.bekon-energy.de/englisch.htm:</a> see last picture on that
page). Thus, I appreciate your clarification, but I am puzzled. The
process I attempted to describe should be easy to implement whether
in a situation where low cost is a primary consideration, or in a
shiny packaged version for a high tech system. What have I missed
here?<br>
<br>
<br>
<blockquote cite="mid:4CC9C591.1060603@schlattmann.de" type="cite">
For getting a better idea of such garage systems you may look at
this report (2003, an independent, scientific report about one of
the first BioFerm systems, german language, but there are also a
lot of pictures to look at).<br>
See page 24, upper image<br>
</blockquote>
<br>
Very clear, yes. I have seen other, similar drawings of Bekon and
Bekon-type systems in the past (and in fact included them in
presentations on biogas such as no doubt we all offer from time to
time), but this is an excellent graphic. Since I am language
impaired-- I do not speak German-- there is much which escapes me
with regard to this report. I would think that the literature in
German regarding biogas is very rich, based on what little I know.<br>
<br>
<br>
<br>
<br>
d.<br>
<div class="moz-signature">-- <br>
<div style="" ;=""><span style="font-size: 110%;">David William
House<br>
</span>
<div style="padding-left: 3em; font-size: 80%;">"The Complete
Biogas Handbook" <code><a href="www.completebiogas.com">www.completebiogas.com</a></code><br>
<em>Vahid Biogas</em>, an alternative energy consultancy <code><a
href="www.vahidbiogas.com">www.vahidbiogas.com</a><br>
<br>
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<div style="padding-left: 2em;">"Make no search for water.
But find thirst,<br>
And water from the very ground will burst."
<div style="padding-left: 2em; font-size: 80%;">(Rumi, a
Persian mystic poet, quoted in <em>Delight of Hearts</em>,
p. 77) <br>
<br>
<a class="moz-txt-link-freetext" href="http://bahai.us/">http://bahai.us/</a></div>
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