[Digestion] Accurate Biogas Yeild

Vianney Tumwesige trustvianney at gmail.com
Wed Nov 24 22:46:16 CST 2010


Thank you Paul, I will definitely check the Wiki

On Thu, Nov 25, 2010 at 5:20 AM, Bryan Sanchez Marcum <bsmarcum at gmail.com>wrote:

> How can I determine the composition of the biogas generated from my
> digester.
>
> On Wed, Nov 24, 2010 at 9:42 PM, Paul Harris <paul.harris at adelaide.edu.au>wrote:
>
>>  G’day All,
>>
>>
>>
>> As promised below there is now an example and a link to a spreadsheet on
>> the biogas wiki at
>> http://biogas.wikispaces.com/Pressure-Volume+calculations if you would
>> like to check my calculations!
>>
>>
>>
>> Happy digesting,
>>
>> HOOROO
>>
>>
>>
>> Mr. Paul Harris, Room S116b, Waite Main Building Faculty of Sciences, The
>> University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064 Ph    : +61
>> 8 8303 7880      Fax   : +61 8 8303 4386
>> mailto:paul.harris at adelaide.edu.au <paul.harris at adelaide.edu.au>
>> http://www.adelaide.edu.au/directory/paul.harris
>>
>>
>>
>> CRICOS Provider Number 00123M
>>
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>> intended recipient please notify the sender by reply email and immediately
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>>
>> *From:* Vianney Tumwesige [mailto:trustvianney at gmail.com]
>> *Sent:* Tuesday, 23 November 2010 3:17 PM
>> *To:* paul.harris at adelaide.edu.au; For Discussion of Anaerobic Digestion
>> *Subject:* Re: [Digestion] Accurate Biogas Yeild
>>
>>
>>
>> Thank you Paul for the insight. Let me know whenever you post an example
>> (and the spreadsheet calculator) on the lovely Biogas wiki.
>>
>> Have a great day, Love your Albert Einstein quotations
>>
>>
>>
>> On Tue, Nov 23, 2010 at 6:49 AM, Paul Harris <paul.harris at adelaide.edu.au>
>> wrote:
>>
>> G’day Vianney et al,
>>
>>
>>
>> I think it was mentioned in this list not that long ago that a “floating
>> drum” storage offers a good, simple way of measuring gas production. You
>> just record the change in height of the drum and volume of gas = area *
>> height (area of a circle = pi Dsquared/4 or pi Rsquared and there are 1000
>> litres in a cubic metre). If you want more accuracy use a small diameter
>> drum with greater height to get the necessary capacity. Pressure and volume
>> of any gas are related by p1v1=p2v2, where p is pressure, v is volume and 1
>> represents the initial conditions and 2 is the final conditions. Mass and
>> volume are related by density, where Density = Mass/Volume and the density
>> of biogas is about 1.18 kg/m3. The easiest way to develop the pressure
>> needed for burners etc is to add weight to the drum (bigger diameter – more
>> weight, since Pressure = kg*9.8/sq.metres) and if you measure “pressure” in
>> mm of water you need to know Pressure (Pa) = 9.8 *Height (mm).  I think that
>> should let you calculate anything you need and I hope you understand the
>> “useful” metric units I have used. I will put an example (and possibly a
>> spreadsheet calculator!) on the biogas wiki.
>>
>>
>>
>> Happy Digesting,
>>
>> HOOROO
>>
>>
>>
>> Mr. Paul Harris, Room S116b, Waite Main Building Faculty of Sciences, The
>> University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064 Ph    : +61
>> 8 8303 7880      Fax   : +61 8 8303 4386
>> mailto:paul.harris at adelaide.edu.au <paul.harris at adelaide.edu.au>
>> http://www.adelaide.edu.au/directory/paul.harris
>>
>>
>>
>> CRICOS Provider Number 00123M
>>
>> This email message is intended only for the addressee(s) and contains
>> information that may be confidential and/or copyright.  If you are not the
>> intended recipient please notify the sender by reply email and immediately
>> delete this email. Use, disclosure or reproduction of this email by anyone
>> other than the intended recipient(s) is strictly prohibited. No
>> representation is made that this email or any attachments are free of
>> viruses. Virus scanning is recommended and is the responsibility of the
>> recipient.
>>
>>
>>
>> *From:* digestion-bounces at lists.bioenergylists.org [mailto:
>> digestion-bounces at lists.bioenergylists.org] *On Behalf Of *Vianney
>> Tumwesige
>> *Sent:* Monday, 22 November 2010 5:41 PM
>>
>>
>> *To:* For Discussion of Anaerobic Digestion
>> *Subject:* [Digestion] Accurate Biogas Yeild
>>
>>
>>
>> Hello AD friends,
>>
>>
>>
>> Hope everyone is fine. Back to business, how would you measure the biogas
>> yield of a system? LPG is measure in Kg and the user can tell how much gas
>> he consumes. Biogas being stored in a volume (liters or cubic meters) makes
>> it hard to relate to pressure (of the biogas).  Have you been able to find a
>> system pressure system good for Africa?
>>
>> Thanks
>>
>> --
>> Vianney Tumwesige
>>
>> Director - Green Heat (U) Ltd  *Error! Filename not specified.*
>>
>> 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
>>
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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
>> Digestion at bioenergylists.org
>>
>> 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/
>>
>>
>>
>
>
> --
> *
>
> Bryan A. Sanchez Marcum
> *
>
>
> _______________________________________________
> Digestion mailing list
>
> to Send a Message to the list, use the email address
> Digestion at bioenergylists.org
>
> 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/
>
>
>


-- 
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/>
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