It depends. In agricultural biogas plants for example most of the
methane comes also from H2/CO2.
The acetate is taken up by acetate oxidizing organisms.
Markus
Am 08.10.2010 21:29, schrieb [email protected]:
It is interesting to compare the flow of carbon in the ruminant with that
of the anaerobic digester. In the animal the main source of methane is
H2/CO2; little comes from acetate. The acetate passes through the
intestinal wall to enter the bloodstream, where it is aerobically
metabolized as a primary carbon and energy source. That's the "idea" of
being a ruminant. In the AD, approx. 2/3 of the methane comes from acetate
and most of the remainder from H2/CO2. Where else would the acetate and
other simple breakdown products go?
Mel
I also noticed in an earlier post the comment about methanogens being
present in our digestive tract (I agree that they are), but why? I think
it
has been suggested they balance the H+ and H2 system so our digestive
system
can operate (so they may be "good" bugs) but it may also be that we
provide
an environment for their survival so they compete for nutrients. I know
CSIRO have done work on reducing methane emissions from cattle so I will
try
to follow that up and I will also ask a gastroenterology colleague here as
well, but comments are welcome.
_______________________________________________
Digestion mailing list
to Send a Message to the list, use the email address
[email protected]
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org
for more information about digestion, see
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
and the Biogas Wiki http://biogas.wikispaces.com/
--
Mit freundlichen Grüßen,
Markus Schlattmann
--------------------------------------
schlattmann sustainables
schlattmann.de
Dipl.-Ing. agr. Markus Schlattmann
Grünseiboldsdorfer Weg 5
85416 Langenbach
Tel.: +49 (0)8761 72162-60
Fax.: +49 (0)8761 72162-61
E-Mail: fir...@schlattmann de
Web:www.schlattmann.de
-------------------------------------
Die Informationen in dieser E-Mail und im Anhang sind vertraulich und
nur für den/die benannten Empfänger bestimmt. Öffnen, Nutzen oder
Verbreiten durch unautorisierte Personen ist untersagt. Falls Sie nicht
der Empfänger oder eine entsprechend autorisierte Person sind,
informieren Sie bitte den Absender und vernichten Sie die Nachricht.
The information in this email and in any attachment is confidential and
intended only for the attention and use of the recipient(s) as
addressed. It must not be disclosed, used or disseminated by any
unauthorized person. If you are not the intended recipient or
accordingly authorized, please contact the sender and delete the
message.
_______________________________________________
Digestion mailing list
to Send a Message to the list, use the email address
[email protected]
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org
for more information about digestion, see
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
and the Biogas Wiki http://biogas.wikispaces.com/
