DIG-L: Re: Fwd: Peat as fuel for biogas digester

[doelle <doelle@ozemail.com.au>]

Dear Kevin,

I thought despite my German background, I had mastered the English language 
reasonably well over the past 40 years in Australia, although typing errors 
sneak in. My apologies, if you misread my contributions ['statements'].

1. I said that I have no idea what the C/N ratio of peat is and thus I 
assume it may be too low in nitrogen and gasification would be the best way 
for energy production. I still have not received from anybody an answer in 
regard to C/N ratio.

2. One of our colleagues in the discussion from Germany mentioned that peat 
could have been partially anaerobically digested, because in these areas 
with peat, there is methane or biogas released, similar to marshes.

3. I made it then clear that, if peat has been anaerobically digested in 
whatever percent, biogas production will not be economical and we go back 
to gasificatoin.

4. If, however, this is not the case, then I expect that peat would have a 
low nitrogen level, like all lignocellulosic material or biomass and would 
require the addition of nitrogenous compounds like wastes from fish 
processing industries, manure or whatever, before digestion can occur. You 
require a C/N ratio of around 25 to 30 in order to be successful with 
biogas production.

I hope I have summarised my statements I sent through this discussion group 
over the past week properly.

My apologies if you misinterpreted my discussion contributions, which 
really are not 'statements', but answers to questions raised.
Horst Doelle

At 09:27  10/08/00 -0300, you wrote:
>Dear Horst
>
>I don't quite follow your logic here.... your "original statement" seems
>to suggest that the peat was already anaerobicaly digested, but now you
>seem to be saying if you add nitrogen to get the right C/N ratio, you
>can digest the peat.
>
>doelle wrote:
> >
> > To Kermit Schlansker
> >
> > You may be right. The important thing for a good anaerobic digestoin is the
> > carbon to nitrogen ratio. I have no idea about this ratio in peat. We were
> > talking about solely peat anaerobic digestoin, which I am doubting to be
> > successful. Of course, if you add all sorts of other material, it may 
> be ok.
> > I come back to my original statement, that it depends on the C/N ratio
> > whether peat can be anaerobically digested.
> > Do you have this information ? I do not know where to find this 
> information.
>
>Do a Net Search using http://www.google.com and find out EVERYTHING you
>always wanted to know about peat!! :-)
>
>Kindest regards,
>
>Kevin Chisholm
>
> > Horst Doelle
> > At 10:38  10/08/00 -0400, you wrote:
> > >To Horst Doelle
>..del..
> > >-----Original Message-----
> > >From: doelle <doelle@ozemail.com.au>
> > >To: Johannes.Moerschner@agr.uni-goettingen.de
> > ><Johannes.Moerschner@agr.uni-goettingen.de>
> > >Cc: bioenergy@crest.org <bioenergy@crest.org>
> > >Date: Wednesday, August 09, 2000 4:22 PM
> > >Subject: Re: Fwd: Peat as fuel for biogas digester
> > >
> > >
> > > >Dear Prof. Moerschner,
> > > >
> > > >Many thanks for your reply. This was also my suggestion. I think
> > > >gasification or some co-generation system would be much better than 
> trying
> > > >biogas. Peat is normally anaerobically digested already.
> > > >Kindest regards
> > > >Horst Doelle
> > > >At 09:09  9/08/00 +0200, you wrote:
> > > >>Why not simply burning the peat in appropriate firing systems? I
> > > >>immagine the energy yield in this way more efficient than transforming
> > > >>peat in biogas before?
> > > >>
> > > >>Johannes Moerschner
> > > >>
> > > >>
> > > >>doelle schrieb:
> > > >> >
> > > >> > Is there somebody in either discussion group who has ever read or
> > >produced
> > > >> > biogas from peat ?
> > > >> > Would greatly appreciate a response.
> > > >> > Many thanks in advance
> > > >> > Horst Doelle
> > > >> >
> > > >> > >I've been reading about bio-gas as a source of fuel and wonder 
> whether
> > > >> there
> > > >> > >is any information available as to whether peat might be a 
> fuel-source
> > > >> for a
> > > >> > >bio-gas digester.
> > > >> > >
> > > >> > >Thanks in advance for any assistance you can offer.
> > > >> > >
> > > >> >
> > > >> > Horst W.Doelle, D.Sc., D.Sc. [h.c.]
> > > >> > Chairman, IOBB
> > > >> > Director, MIRCEN-Biotechnology
> > > >> > FAX: +617-38783230
> > > >> > Email: doelle@ozemail.com.au
> > > >>
> > > >>__________________________________________________________________
> > > >>
> > > >>Johannes Moerschner
> > > >>Inst. Agric. Engineering
> > > >>GOETTINGEN UNIVERSITY, Germany
> > > >>
> > > >>Homepage (deutsch): http://www.gwdg.de/~jmoersc/internet/hauptd.htm
> > > >>Homepage (english): http://www.gwdg.de/~jmoersc/internet/haupte.htm
> > > >>
> > > >>URL Dept. Agric. Engineering: http://gwdu19.gwdg.de/~uaat/
> > > >>===================================================================
> > > >
> > > >Horst W.Doelle, D.Sc., D.Sc. [h.c.]
> > > >Chairman, IOBB
> > > >Director, MIRCEN-Biotechnology
> > > >FAX: +617-38783230
> > > >Email: doelle@ozemail.com.au
> > > >
> > > >
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> >
> > Horst W.Doelle, D.Sc., D.Sc. [h.c.]
> > Chairman, IOBB
> > Director, MIRCEN-Biotechnology
> > FAX: +617-38783230
> > Email: doelle@ozemail.com.au
> >
> > The Bioenergy List is sponsored by:
> > David M. Gubanc.P.E. http://www.gubanc.com
> > dk-TEKNIK ENERGY & ENVIRONMENT http://www.dk-teknik.com
> > Hazen Research, Inc. http://www.hazenusa.com
> >
> > Other Sponsors, Archives and Information:
> > http://www.nrbp.org/bio2000.htm
> > http://solstice.crest.org/renewables/bioenergy-list-archive/
> > http://www.crest.org/renewables/biomass-info/
> > http://www.crest.org/renewables/biomass-info/carbon.shtml

Horst W.Doelle, D.Sc., D.Sc. [h.c.]
Chairman, IOBB
Director, MIRCEN-Biotechnology
FAX: +617-38783230
Email: doelle@ozemail.com.au

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