[Digestion] 5000 dairy cow AD system

[Alexander Eaton]

www.sistemabiobolsa.com

Providing solutions for farms of 100 head (dairy) and 1000 head (swine).
 Currently in Latin America, but available for export to US.

Best,

A

On Tue, Jan 10, 2012 at 1:21 PM, <jonathan at bmpconsultants.com> wrote:

> The issue here is that your looking for a commercially available system.
>  Smaller systems are not commercially manufactured due to business models
> proving the larger capital returns from the larger systems.  Their are many
>  individuals that are "the garage inventors" that have successfully put
> together these smaller systems.  Generally these systems have been created
> using re-purposed material which has put the capital investment cost down
> to near to nothing.   My suggestion would be to get a small team of
> these ingenious individuals together and create your own solution.  Once
> proven, simply market your solution as it appears to be an available niche
> market.
>
> On Tue, Jan 10, 2012 at 11:46 AM, David <david at h4c.org> wrote:
>
>>
>>
>> On 1/9/2012 8:34 PM, Gould, Charles wrote:
>>
>> Mr. Harris,
>>
>>  I like your suggestion of smaller digesters. The problem is I have not
>> been able to find a digester design robust enough yet cheap enough for a
>> 100 cow dairy. Do you know where such a design exists? I have just about
>> given up the notion that such a thing exists.
>>
>>
>> This highlights a difficulty which may be partially fundamental (and to
>> that degree absolute) but which seems largely conceptual, which is that
>> because situations differ so much, and the need sufficiently moderate that
>> there are few if any standard "replicable" designs for digesters, of the
>> sort that would be used for, say, a large block of tract houses, where
>> 1,000 houses might share four or five basic floor plans. And no doubt
>> specifics in this area vary country-to-country...
>>
>> AgSTAR, of the US EPA, which could be said to be the primary
>> government-based promoter of biogas in the US, is aimed strictly at
>> manure-using digesters for farms with 500+ animals. For example, although
>> it could hardly be said to be a digester at a modest scale (cost: $US10M+),
>> the AgSTAR site deliberately (according to my conversation with a staffer)
>> does not mention the Stahlbush Island Farms digester in Corvallis, OR,
>> because it is fed plant matter exclusively-- therefore it is not a
>> manure-based digester.
>>
>> It becomes a kind of self-fulfilling prophecy, because the system (in its
>> academic support, among its industrial implementers and so on), becomes
>> adapted to larger digesters, and therefore has that much more difficulty
>> accommodating a different scale of thinking. But as well, it seems that the
>> variability of energy prices in the US, where feed-in tariffs appear to be
>> a political impossibility, has prevented the establishment of an industry
>> that might work its way down to "smaller" digesters, after the larger
>> digesters on the megafarms have been built, similar to what seems to be
>> happening in Germany.
>>
>> I think there may well be a number of lower-cost building and process
>> control technologies, perhaps along with energy crop co-digestion
>> strategies, which could be put together in the proper circumstances to
>> reduce the cost of digesters of a size below the AgSTAR limit in the US;
>> but it would require a funder with vision to realize such an outcome.
>>
>> d.
>> --
>> David William House
>>  "The Complete Biogas Handbook" www.completebiogas.com
>> *Vahid Biogas*, an alternative energy consultancy www.vahidbiogas.com
>>
>>  "Make no search for water.       But find thirst,
>> And water from the very ground will burst."
>> (Rumi, a Persian mystic poet, quoted in *Delight of Hearts*, p. 77)
>>
>> http://bahai.us/
>>
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>> 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/
>>
>>
>>
>
> _______________________________________________
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>
> to Send a Message to the list, use the email address
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> 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/
>
>
>


-- 
Alexander Eaton
Sistema Biobolsa
IRRI-Mexico
RedBioLAC

Mex cel: (55) 11522786
US cel: 970 275 4505

alex at irrimexico.org
alex at sistemabiobolsa.com

sistemabiobolsa.com
www.irrimexico.org
www.redbiolac.org
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