[Gasification] conversion of CO2 into methane (Off Topic)

[Anand Karve]

Dear Rolf,
the metabolism of anaerobes is a bit different than that of aerobic
organisms. The anaerobes too need oxygen, but they take it from their
substrate and not from air. Thus they convert nitrate into ammonia,
sulphate into sulphide and carbohydrates into hydrocarbons. When the
reduced compounds are oxidised, they release energy. So the aerobic
organisms thrive on so called high energy food, because we measure the
energy by oxidising the material. But in the case of methanogens, I feel
that they are happy if they get food which is already rich in oxygen. I am
quite aware of the fact that energy has to be put into the process if the
reaction yields a substance having a higher energy content.1 kg sugar
having only 4000 kcal/kg yields about 350 g methane having a calorific
value of about 4200kcal. This a paradox, but one must realise, that the
digester in this case must always be kept at >30C. So it is perhaps the
heat from the atmosphere that is providing the additional energy. Secondly,
 from an entropy point of view, sugar has a much lower entropy than the
products of methanogenesis, which are methane and carbondioxide. So from
the point of view of entropy, there is no paradox.
Yours
A.D.Karve

***
Dr. A.D. Karve

Chairman, Samuchit Enviro Tech Pvt Ltd (www.samuchit.com)

Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)

On Tue, Apr 19, 2016 at 6:00 PM, Energies Naturals C.B. <
energiesnaturals at gmx.de> wrote:

>
> I do,
>
> it surprises me, though to see that there is a way to build a higher
> energetical product from an energetically " lower" one.
> Where doest the energy come from? Can anybody help me?
>
> Thanks
> Rolf
>
>
> On Mon, 18 Apr 2016 17:57:13 -0500
> Greg Manning <a31ford at gmail.com> wrote:
>
> > Doug... I for one, find it very interesting if you kept this conversation
> > ON LIST even though it is, as you said. Off topic. I do indeed find it of
> > interest.
> >
> > Does anyone else find it interesting ???
> >
> > Greg Manning
> > On Feb 2, 2016 8:36 PM, "Doug Williams" <doug.williams.nz at gmail.com>
> wrote:
> >
> >
> > Hi Dr Karve,
> >
> > Not sure you are directing your question to the right forum, but as it's
> > CO2 and methane, guess it qualifies, but never thought my own interest in
> > this humble cell form would be useful to anyone(:-)
> >
> > Archaea having been around for 3-4 billion years are the ultimate
> colonist
> > of any environment, survival being that they arrive at their destination
> > from where ever they come from. Even if there was not the chemistry
> present
> > to feed directly, they can also take in energy from Sunlight and convert
> > this to feed. Mutation is rapid, given the environmental chemistry would
> > also changing around them over a few million years or so. Time doesn't
> seem
> > to matter and they keep multiplying to suit their environment. They can
> now
> > be found in just about every thing on this planet,so I'm sure carbonic
> acid
> > was considered ideal nutrient.
> >
> > Given that your interest is of their participation in digestive processes
> > and the evolution of methane, one can only guess that the building blocks
> > allowing their evolution branching into bacteria one way, and eucaryota
> the
> > other, they had plenty of places to turn host nutrient into methane. My
> own
> > interest is their function within the human gut, evidenced by their
> methane
> > production and distinctive smell, and how they might be involved with the
> > matrix of peptides on which warm blooded cells of life forms build.
> >
> > It may be better to discuss this privately rather than be off topic.
> >
> > Regards,
> > Doug Williams,
> > Fluidyne.
> >
> >   On Mon, 1 Feb 2016 09:23:11 +0530
> > Anand Karve <adkarve at gmail.com> wrote:
> >
> > > When the archaea arrived on the earth, the earth's atmosphere had
> mainly
> > > nitrogen and carbon dioxide.  How did they survivet? I have been
> thinking
> > > on it.  CO2 forms H2CO3 when it combines with water.  Did they use this
> > > carbonic acid as food? (2H2CO3=CH4 + CO2)
> > > Yours
> > > A.D.Karve
> > > ***
> > > Dr. A.D. Karve
> > >
> > > Chairman, Samuchit Enviro Tech Pvt Ltd (www.samuchit.com)
> > >
> > > Trustee & Founder President, Appropriate Rural Technology Institute
> (ARTI)
> >
> >
> > --
> > Doug Williams <Doug.Williams.nz at gmail.com>
> >
> > _______________________________________________
> > Gasification mailing list
> >
> > to Send a Message to the list, use the email address
> > Gasification at bioenergylists.org
> >
> > to UNSUBSCRIBE or Change your List Settings use the web page
> >
> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org
> >
> > for more Gasifiers,  News and Information see our web site:
> > http://gasifiers.bioenergylists.org/
>
>
> --
> Energies Naturals C.B. <energiesnaturals at gmx.de>
>
> _______________________________________________
> Gasification mailing list
>
> to Send a Message to the list, use the email address
> Gasification at bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
>
> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org
>
> for more Gasifiers,  News and Information see our web site:
> http://gasifiers.bioenergylists.org/
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/gasification_lists.bioenergylists.org/attachments/20160420/51bddb62/attachment.html>