[Digestion] Digestion Digest, Vol 24, Issue 6

[Energies Naturals C.B.]

Dear Elisabeth,

"the other year" Iplanned a similar operation for the slaughterhause 
wastes of Mallorca.
I talked intensively to competent folks from Svizzerland,Spain, Germany 
anc the Cheq Republic.

Sterilization is a must, but the main concern was that a high N 
feedstock must be compensated by at least 70 % C for a feasable 
digestion and the C source must be reliable!

There can also arise issues with the effluent, check your local laws if 
you want to use it as  a fertilizer or dispose of  it.

We gave up before we really began because we could not organize a 
reliable C base.

This should not discourage you, your circumstances might be better.

Good luck!

Rolf




Am 12.08.2012 21:00, schrieb digestion-request at lists.bioenergylists.org:
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>     1. need for assistance (Elisabeth Staniewski)
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> Message: 1
> Date: Sat, 11 Aug 2012 23:33:09 -0600
> From: Elisabeth Staniewski<estaniewski249 at gmail.com>
> To: digestion at lists.bioenergylists.org
> Subject: [Digestion] need for assistance
> Message-ID:
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> Dear Friends at DigestionDigest,
>
> I have been a member of DigestionDigest for many years, but last three
> years I was off work force due to health issues and was not participating
> in the discussions.  Finally last week I landed a new research project.
>   In the past, I have completed a number of projects on renewable energy,
> including biogas from anaerobic digestion processes; no detailed
> calculations though, assessing technical, environmental and economic
> aspects of a variety of processes/technologies.  I learned two days ago
> what my next research work will be about; it is a very fascinating project,
> and I am looking forward to begin.  The company is planning to build a
> pilot plant to convert a mixture of organic waste into biogas; it is a
> thermal hydrolysis process (high pressure, 125 degrees C) that is going to
> process a mixture of organic waste: about  35% of SRM/specified risk
> material (slaughterhouse by-products, high probability BSE/Mad Cow
> Disease), the rest being cow manure and food waste. Government
> Environmental Agency has reviewed an application for approval and came up
> with several questions with regards to additional required information.
> According to my knowledge there is none presently operating similar process
> and therefore no factual information is available.  And, I am going to be
> the one who has to deliver best estimates available.  Do you know about any
> similar process, either operating or in a research stage, or lab stage that
> I can learn about?  I would very much appreciate any assistance.  Looking
> forward to our communication again.
>
> Best Regards,
>
> Elisabeth Staniewski
> Alberta, Canada
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> End of Digestion Digest, Vol 24, Issue 6
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