[Digestion] Compressing of biogas

Alexander Eaton alex at sistemabiobolsa.com
Tue Nov 23 10:58:30 CST 2010


We go around this issue frequently, as end users often come up with the same
idea.  It is hard to tell them no, so we always take a fresh look under the
circumstances.  At the end of the day filtration of CO2 i always ruled out,
and that means 40% of the volume of gas you are compressing serves no
energetic purpose.  Add that to the fact that methane does not like to be
compressed, and we arrive again at a "no" response.

The one option we always examine is the non-compressed transportation of
large gas reservoirs.  This we have tried for distances that are too long
for a simple gas line, and short enough to be practical by cart.  Since we
can make durable gas reservoirs of any size and shape, this is not
unfeasible.  Once transported, the gas is connected and used as usual, while
a second reservoir is filling.  If you can create value for this use, and
the transport logistics to not out-weight the value of the energy provided,
you may have an option for success.  Others have used large truck
inner-tubes in the same way, that are then rolled down the street to the end
use.  I suspect that in certain locations, systems that considered
low-pressure distribution could gain some traction.

Saludos,

A

On Tue, Nov 23, 2010 at 6:21 AM, Vianney Tumwesige
<trustvianney at gmail.com>wrote:

> Hello Harold,
>
> I completely agree withYvonne, it will be economically expensive to
> compress the gas.
>
> P.S. Yvonne, could you send me a copy of the paper and ppt as well?
>
> Best regards
>
>  On Tue, Nov 23, 2010 at 1:49 PM, Harold leffertstra <
> haroldleffertstra at yahoo.no> wrote:
>
>>    hello
>> Got a question from the owner of a small biogass plant in Tanzania.
>> He is expanding a small existing biogas plant to be able to digest waste
>> from 200 households and manure from 100 cows.
>> He is interested in using the biogas for fueling vehicles. In our part of
>> the world we think it will be necessary with cleaning, uppgrading of the
>> gas and compressing.
>> Do any of you have experience/ideas about whether this is feasible for
>> such a small plant?
>> 1)What is necessary to use the biogas for fueling vehicles and 2) what are
>> the technical and economical consequences?
>> Thank you
>> Harold Leffertstra
>> Senior Advisor
>> Norwegian Climate and Pollution Agency
>> Oslo
>>
>>
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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/
>>
>>
>>
>
>
> --
> Vianney Tumwesige
> Director - Green Heat (U) Ltd  [image: Picture]
> P.O. Box 10235
> Kampala-Uganda
> 256 (0) 71 237 9889
>
> "The more people are self sufficient in cooking fuel, the more personal and
> financial freedom they have." - Emma Casson
>
>
>  <http://trustvianney.wordpress.com/>
>
>
> _______________________________________________
> Digestion mailing list
>
> 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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