[Digestion] Accurate Biogas Yeild

Wed Nov 24 20:20:15 CST 2010

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
>
> 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:* 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
>
> 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/>
>
>
>
> _______________________________________________
> 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
*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/digestion_lists.bioenergylists.org/attachments/20101124/8f07be46/attachment.html>