Re: DIG-L: Energy from internal heating of horse manure

["Len Walde" <sigma@ix.netcom.com>]

Hello All:

Here is a good place to start for info on Greenhouse heating -- you can go
on from there:
http://www.attra.org/attra-pub/compostheatedgh.html

good luck:

Len Walde, P.E.

        Sigma Energy Engineering, Inc.
Renewable Energy, Process Engineering
Serving Agriculture, Industry & Commerce
      through "Symbiotic Recycling" tm

      Ph:  925-254-7633
      E-mail: sigma@ix.netcom.com




----- Original Message -----
From: "Paul Harris" <Paul.Harris@adelaide.edu.au>
To: "Boer, Andre de" <a.de.boer@novem.nl>; "digestionlistserver"
<digestion@crest.org>
Sent: Sunday, July 21, 2002 6:49 PM
Subject: Re: DIG-L: Energy from internal heating of horse manure


> G'day,
>
> If you do not aerate the heap the digestion will be anaerobic and will
> (if the right bacteria happen to be present) produce methane, so you not
> only have a greenhouse gas but an explosion hazard as well!
>
> I think AD is exothermic, it is just that we put so much water in the
> system that you do not notice it (I am an agricultural engineeer by
> training, so do not quote me on this point).
>
> > "Boer, Andre de" wrote:
> >
> > I got a projectproposal about energy from internal heating (Dutch:
> > 'broei') in horsemanure. The exploiter wants to collect manure on a
> > pile and extract heat from it. Besides many practical questions I have
> > some more theoretical questions I would like to ask the list.
> >
> > (1). This is digestion, but also is it **anearobic** digestion?
> > (2). How much energy can you theoretically extract this way from the
> > manure (compared to classic A.D. where you put the manure in a closed
> > tank and digest for 15-50 days?)
> >
> > (3). Which gasses does a pile of heating manure emit?
> > Greenhousegasses??
> > (4). Why is internal heating an exothermic process while classic A.D.
> > is an endothermic process?
> > (5). Has anyone of you ever seen a project like this and where can I
> > find more about that project?
> >
> > Thanks for replying.
> >
> > Andre de Boer
> > Novem
> >
> > ==================================================
> > Drs. A.T. (Andre) de Boer    phone: +31-30-2393411
> > Novem                          fax: +31-30-2316491
> > PObox 8242              email:  a.de.boer@novem.nl
> > <mailto:a.de.boer@novem.nl>
> > 3503 RE Utrecht               NL web: www.novem.nl
> > <http://www.novem.nl/>
> > Netherlands                  UK web: www.novem.org
> > <http://www.novem.org/>
> >                       private email: adb@vinden.nl
> > <mailto:adb@vinden.nl>
> > ==================================================

--------------------------SNIP ---------------------------------------------
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