Yes, I agree with the statement that with time everything turns to biogas, as time is of course the main engineering variable. With lignin, anaerobic digestion is possible in two ways. Firstly, very low concentration of lignin can be degraded in such a way, that the decomposition intermediates of lignin are do not exceed the concentrations, when they become toxic to the microbiota. Such a sistem is hard to manage, as the kinetics of the decomoposition cascade has to be very closelly monitored. The second obvious option is pretreatment of lignin (mechanical, chemical, ...) that degrade the lignin beyond the toxic intermediates. The latter is more likely to be involved in the procedure you have mentioned.
BR, Gasan Dear Gasan, thanks for the information. Back in 1983, I spent about 6 months in Freiburg, Germany, conducting my own research in plant physiology, At that time I was not particularly interested in biogas technology, but I used to attend a number of the guest lectures which the university offered. I remember hearing a lecture in which the lecturer said that a biogas plant was capable of digesting any organic substance, even petroleum. All one had to do was to give it enough time. He then told us how the system developed by him was being used by a paper factory in Germany to obtain biogas from lignin, which remained behind after the cellulose in the wood was extracted for making paper. I do not remember the name of the lecturer. . Yours A.D.Karve On 27 October 2010 21:00, <[email protected]>wrote: > Send Digestion mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > > http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org > > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Digestion digest..." > > > Today's Topics: > > 1. Re: gasyield indigenious cowdung (Anand Karve) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 27 Oct 2010 12:52:23 +0800 > From: Anand Karve <[email protected]> > To: For Discussion of Anaerobic Digestion > <[email protected]> > Subject: Re: [Digestion] gasyield indigenious cowdung > Message-ID: > <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > Dear Gasan, > thanks for the information. Back in 1983, I spent about 6 months > in Freiburg, Germany, conducting my own research in plant physiology, At > that time I was not particularly interested in biogas technology, but I > used > to attend a number of the guest lectures which the university offered. > I remember hearing a lecture in which the lecturer said that a biogas plant > was capable of digesting any organic substance, even petroleum. All one had > to do was to give it enough time. He then told us how the system developed > by him was being used by a paper factory in Germany to obtain biogas > from lignin, which remained behind after the cellulose in the wood was > extracted for making paper. I do not remember the name of the lecturer. . > Yours > A.D.Karve > > On Tue, Oct 26, 2010 at 1:56 PM, Gasan Osojnik <[email protected] > >wrote: > > > The biological degradation of lignin in anaerobic environments occures > > rarely, and when it occurs it produces substances toxic to methanogenic > > microbiota, such as phenols and para-cresol. In our experience, the > lignin > > decomposition intermediates inhibit the biogas production even in > reactors > > operating in continious regimes. > > > > BR, Gasan > > > > > > > > On 26 October 2010 05:25, <[email protected] > >wrote: > > > >> gasyield indigenious cowdung > > > > > > > > _______________________________________________ > > 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/ > > > > > > > > > -- > *** > Dr. A.D. Karve > President, Appropriate Rural Technology Institute (ARTI) > > *Please change my email address in your records to: [email protected] * > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.bioenergylists.org/pipermail/digestion_lists.bioenergylists.org/attachments/20101027/0af83db2/attachment-0001.html > > > > ------------------------------ > > _______________________________________________ > 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/ > > > > End of Digestion Digest, Vol 2, Issue 51 > **************************************** >
_______________________________________________ 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/
