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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>G’day (bonjour),<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I am pleased to say that my schoolboy French allowed me to
basically understand that you are asking about the need for oxygen and Buswell’s
equation, but I am not going to try and respond in French (except via Alta
Vista translations, that did help me understand your query a bit better).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I am an agricultural engineer so my chemistry is limited, but it
must be only dissolved oxygen that restricts the anaerobes as there is oxygen
in the water that is necessary for digestion to occur (I had not thought of
this till you asked the question!). I suggest that the hydrolysis stage uses
oxygen ions (so no free oxygen can inhibit the anaerobes) and the reason that
Buswell overestimates methane production is that not all the substrate can be
used by micro-organisms as they begin to “starve to death” as their
food supply depletes.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I hope this helps,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>HOOROO (au revoir)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal>Je suis heureux de dire que mon Français d'écolier m'a
permis de comprendre fondamentalement que vous vous enquérez du besoin
d'oxygène et d'équation de Buswell, mais je ne vais pas essayer et répondre en
français (excepté par l'intermédiaire des traductions d'Alta Vista, qui m'ont
aidé à comprendre votre question un peu mieux). Je suis un ingénieur agricole
ainsi ma chimie est limitée, mais ce doit être seulement un oxygène dissous qui
limite les anaérobies car il y a de l'oxygène dans l'eau qui est nécessaire
pour que la digestion se produise (je n'avais pas pensé à ceci jusqu'à ce que
vous ayez posé la question !). Je propose que l'étape d'hydrolyse emploie des
ions de l'oxygène (ainsi aucun oxygène libre ne peut empêcher les anaérobies)
et la raison pour laquelle la production de méthane de sur-estimations de
Buswell est que non tout le substrat peut être employé par des micro-organismes
pendant qu'elles commencent “meurent de faim à la mort” pendant que
leurs approvisionnements alimentaires épuisent.<span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Mr. Paul Harris, Room 202 Charles Hawker 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 <a
href="mailto:paul.harris@adelaide.edu.au"><span style='color:blue'>mailto:paul.harris@adelaide.edu.au</span></a>
<a href="http://www.adelaide.edu.au/directory/paul.harris"><span
style='color:blue'>http://www.adelaide.edu.au/directory/paul.harris</span></a><o:p></o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> digestion-bounces@lists.bioenergylists.org
[mailto:digestion-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>elamin
afilal<br>
<b>Sent:</b> Friday, 1 April 2011 6:52 AM<br>
<b>To:</b> digestion@lists.bioenergylists.org<br>
<b>Subject:</b> [Digestion] le taux de conversion en methane<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Garamond","serif"'>bonjour,<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Garamond","serif"'>sachant
que la biomethanisation est une succession d'étapes, et donc tous dépend de la
première? est ce que lors des étapes suivantes, la première est totalement
arrêté? la première étape d'hydrolyse à besoin d'O2, et la dernière
étape ne tolère pas l'O2, donc une fois l'O2 est épuisé, les autres phases
démarrent? c'est ça l'explication pourquoi la formule de BUSWEL donne toujours
un taux de conversion théorique plus élevé que l'expérience? est ce que vous
avez une autre explication ?<br>
<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Garamond","serif"'>Merci<o:p></o:p></span></p>
</div>
<p><b><i><span style='font-size:14.0pt'> ---------------------------------------------------</span></i></b><span
style='font-size:14.0pt;font-family:"Garamond","serif"'><o:p></o:p></span></p>
<div>
<p class=MsoNormal><b><i><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:black'>Pr.AFILAL Mohamed Elamin <br>
Université Mohamed
Premier </span></i></b><b><i><span
style='font-size:14.0pt'> <o:p></o:p></span></i></b></p>
<div>
<p class=MsoNormal><b><i><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:black'>Laboratoire de Biologie des Plantes et Micro-organismes</span></i></b><b><i><span
style='font-size:14.0pt'><o:p></o:p></span></i></b></p>
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"digestion-request@lists.bioenergylists.org" <digestion-request@lists.bioenergylists.org><br>
<b>À :</b> digestion@lists.bioenergylists.org<br>
<b>Envoyé le :</b> Jeu 31 mars 2011, 19h 00min 02s<br>
<b>Objet :</b> Digestion Digest, Vol 7, Issue 15<br>
</span><span style='font-size:14.0pt'><br>
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Today's Topics:<br>
<br>
1. density of methane and bottling (Murali Krishna)<br>
2. Re: density of methane and bottling (Paul Harris)<br>
3. Re: density of methane and bottling (Murali Krishna)<br>
4. Re: flame lifting (Deepak D. G.)<br>
5. biogas stove flame (Murali Krishna)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Thu, 31 Mar 2011 11:46:35 +0530<br>
From: Murali Krishna <<a href="mailto:bmkrishna6@gmail.com">bmkrishna6@gmail.com</a>><br>
To: <a href="mailto:Digestion@bioenergylists.org">Digestion@bioenergylists.org</a><br>
Subject: [Digestion] density of methane and bottling<br>
Message-ID:<br>
<AANLkTi=KnmN4D7qLvw5Pa69vvUJZsCD9acdaMb+<a
href="mailto:t2jmY@mail.gmail.com">t2jmY@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Hi,<br>
<br>
I shall thank you to clarify the follwoing:<br>
<br>
The density of methane is shown as 0.67, 0.72 and 1.2 on the web.
Presuming<br>
that 1000 cubic meter of methane at 70% in biogas, purified upto 95% and<br>
then compressed what will be the output of gas in kgs. It is likely to be<br>
compressed at three stages upto 180 bar pressure.<br>
<br>
Krishna<br>
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<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Thu, 31 Mar 2011 20:52:14 +1030<br>
From: "Paul Harris" <<a href="mailto:paul.harris@adelaide.edu.au">paul.harris@adelaide.edu.au</a>><br>
To: "'For Discussion of Anaerobic Digestion'"<br>
<<a href="mailto:digestion@lists.bioenergylists.org">digestion@lists.bioenergylists.org</a>><br>
Subject: Re: [Digestion] density of methane and bottling<br>
Message-ID: <001b01cbef8d$81da84c0$858f8e40$@<a
href="mailto:harris@adelaide.edu.au">harris@adelaide.edu.au</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
G'day Krishna,<br>
<br>
<br>
<br>
I think the different figures are for different pressures and/or<br>
temperatures, as conventions vary. I have a value of 0.628 kg/m3 at 1.103<br>
kPa and 20C, so 1000 m3 of biogas will become 737 cubic metres of 95%<br>
methane. Ignoring the CO2 will give 700 m3 of methane, weighing about 440<br>
kg. This will be the mass whatever the pressure (unless you have a leak!).<br>
At 180 bar the volume will be approximately 4 cubic metres (at 20C).<br>
<br>
<br>
<br>
Hope this helps,<br>
<br>
HOOROO<br>
<br>
<br>
<br>
Mr. Paul Harris, Room 202 Charles Hawker Building, Faculty of Sciences, The<br>
University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064 Ph
: +61<br>
8 8303 7880 Fax : +61 8 8303 4386 mailto:<a
href="mailto:paul.harris@adelaide.edu.au">paul.harris@adelaide.edu.au</a><br>
<a href="http://www.adelaide.edu.au/directory/paul.harris" target="_blank">http://www.adelaide.edu.au/directory/paul.harris</a><br>
<br>
<br>
<br>
CRICOS Provider Number 00123M<br>
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This email message is intended only for the addressee(s) and contains<br>
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From: <a href="mailto:digestion-bounces@lists.bioenergylists.org">digestion-bounces@lists.bioenergylists.org</a><br>
[mailto:<a href="mailto:digestion-bounces@lists.bioenergylists.org">digestion-bounces@lists.bioenergylists.org</a>]
On Behalf Of Murali<br>
Krishna<br>
Sent: Thursday, 31 March 2011 4:47 PM<br>
To: <a href="mailto:Digestion@bioenergylists.org">Digestion@bioenergylists.org</a><br>
Subject: [Digestion] density of methane and bottling<br>
<br>
<br>
<br>
Hi,<br>
<br>
I shall thank you to clarify the follwoing:<br>
<br>
The density of methane is shown as 0.67, 0.72 and 1.2 on the web.
Presuming<br>
that 1000 cubic meter of methane at 70% in biogas, purified upto 95% and<br>
then compressed what will be the output of gas in kgs. It is likely to be<br>
compressed at three stages upto 180 bar pressure.<br>
<br>
Krishna<br>
<br>
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------------------------------<br>
<br>
Message: 3<br>
Date: Thu, 31 Mar 2011 20:41:40 +0530<br>
From: Murali Krishna <<a href="mailto:bmkrishna6@gmail.com">bmkrishna6@gmail.com</a>><br>
To: <a href="mailto:paul.harris@adelaide.edu.au">paul.harris@adelaide.edu.au</a>,
For Discussion of Anaerobic Digestion<br>
<<a href="mailto:digestion@lists.bioenergylists.org">digestion@lists.bioenergylists.org</a>><br>
Subject: Re: [Digestion] density of methane and bottling<br>
Message-ID:<br>
<AANLkTimodb83dvZ9GAsrL0t8dcLkttZgNGXkyA+Gy9+=@mail.gmail.com><br>
Content-Type: text/plain; charset="windows-1252"<br>
<br>
Good day Paul,<br>
<br>
Thank you for your prompt reply.<br>
<br>
How have you arrived at 440 kg weight from 700 m3 of methane? Will you<br>
please elaborate?<br>
<br>
Regards,<br>
<br>
Krishna<br>
<br>
<br>
<br>
<br>
On Thu, Mar 31, 2011 at 3:52 PM, Paul Harris <<a
href="mailto:paul.harris@adelaide.edu.au">paul.harris@adelaide.edu.au</a>>wrote:<br>
<br>
> G?day Krishna,<br>
><br>
><br>
><br>
> I think the different figures are for different pressures and/or<br>
> temperatures, as conventions vary. I have a value of 0.628 kg/m3 at 1.103<br>
> kPa and 20C, so 1000 m3 of biogas will become 737 cubic metres of 95%<br>
> methane. Ignoring the CO2 will give 700 m3 of methane, weighing about 440<br>
> kg. This will be the mass whatever the pressure (unless you have a leak!).<br>
> At 180 bar the volume will be approximately 4 cubic metres (at 20C).<br>
><br>
><br>
><br>
> Hope this helps,<br>
><br>
> HOOROO<br>
><br>
><br>
><br>
> Mr. Paul Harris, Room 202 Charles Hawker Building, Faculty of Sciences,<br>
> The University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064
Ph<br>
> : +61 8 8303 7880 Fax : +61 8 8303 4386<br>
> mailto:<a href="mailto:paul.harris@adelaide.edu.au">paul.harris@adelaide.edu.au</a>
<<a href="mailto:paul.harris@adelaide.edu.au">paul.harris@adelaide.edu.au</a>><br>
> <a href="http://www.adelaide.edu.au/directory/paul.harris" target="_blank">http://www.adelaide.edu.au/directory/paul.harris</a><br>
><br>
><br>
><br>
> CRICOS Provider Number 00123M<br>
><br>
> This email message is intended only for the addressee(s) and contains<br>
> information that may be confidential and/or copyright. If you are not
the<br>
> intended recipient please notify the sender by reply email and immediately<br>
> delete this email. Use, disclosure or reproduction of this email by anyone<br>
> other than the intended recipient(s) is strictly prohibited. No<br>
> representation is made that this email or any attachments are free of<br>
> viruses. Virus scanning is recommended and is the responsibility of the<br>
> recipient.<br>
><br>
><br>
><br>
> *From:* <a href="mailto:digestion-bounces@lists.bioenergylists.org">digestion-bounces@lists.bioenergylists.org</a>
[mailto:<br>
> <a href="mailto:digestion-bounces@lists.bioenergylists.org">digestion-bounces@lists.bioenergylists.org</a>]
*On Behalf Of *Murali Krishna<br>
> *Sent:* Thursday, 31 March 2011 4:47 PM<br>
> *To:* <a href="mailto:Digestion@bioenergylists.org">Digestion@bioenergylists.org</a><br>
> *Subject:* [Digestion] density of methane and bottling<br>
><br>
><br>
><br>
> Hi,<br>
><br>
> I shall thank you to clarify the follwoing:<br>
><br>
> The density of methane is shown as 0.67, 0.72 and 1.2 on the web.<br>
> Presuming that 1000 cubic meter of methane at 70% in biogas,
purified upto<br>
> 95% and then compressed what will be the output of gas in kgs. It is
likely<br>
> to be compressed at three stages upto 180 bar pressure.<br>
><br>
> Krishna<br>
><br>
> _______________________________________________<br>
> Digestion mailing list<br>
><br>
> to Send a Message to the list, use the email address<br>
> <a href="mailto:Digestion@bioenergylists.org">Digestion@bioenergylists.org</a><br>
><br>
> to UNSUBSCRIBE or Change your List Settings use the web page<br>
><br>
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href="http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org"
target="_blank">http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org</a><br>
><br>
> for more information about digestion, see<br>
> Beginner's Guide to Biogas<br>
> <a href="http://www.adelaide.edu.au/biogas/" target="_blank">http://www.adelaide.edu.au/biogas/</a><br>
> and the Biogas Wiki <a href="http://biogas.wikispaces.com/" target="_blank">http://biogas.wikispaces.com/</a><br>
><br>
><br>
><br>
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<br>
Message: 4<br>
Date: Thu, 31 Mar 2011 23:31:27 +0800<br>
From: "Deepak D. G." <<a href="mailto:ghindwani@gmail.com">ghindwani@gmail.com</a>><br>
To: <a href="mailto:digestion@lists.bioenergylists.org">digestion@lists.bioenergylists.org</a><br>
Subject: Re: [Digestion] flame lifting<br>
Message-ID: <<a href="mailto:4D949E4F.1050308@gmail.com">4D949E4F.1050308@gmail.com</a>><br>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br>
<br>
Dear listeners,<br>
<br>
I would like to consult on a issue of flame lifting.<br>
<br>
I have installed 8 floating digesters and all are working well and the <br>
gas production is also very good.<br>
<br>
The only issue I have right now is the flame lifting issue, specially <br>
with the latest installation. The latest installation, in a village in <br>
Bali, has a capacity of 1000 liter gas tank and the distance between <br>
the structure and the stove is about 20 meters. I used a combination of <br>
a plastic tube and pvc of equal size and that is 1/2".<br>
<br>
I can not get the flame burned immediately above the surface of the <br>
burner but it is lifting. I have tried the same stove at home in which <br>
the distance between the biogas and the stove is about 8 meters and
<br>
the flame is stable and not lifting.<br>
<br>
Can anybody suggest solutions to this issue? thanks<br>
<br>
Rgds,<br>
Deepak<br>
<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 5<br>
Date: Thu, 31 Mar 2011 22:51:59 +0530<br>
From: Murali Krishna <<a href="mailto:bmkrishna6@gmail.com">bmkrishna6@gmail.com</a>><br>
To: <a href="mailto:Digestion@bioenergylists.org">Digestion@bioenergylists.org</a><br>
Subject: [Digestion] biogas stove flame<br>
Message-ID:<br>
<AANLkTi=cM5+vhPq8Chi6ts8zSjJ1P-Ghr=<a
href="mailto:rMryxARA2K@mail.gmail.com">rMryxARA2K@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Dear Deepak,<br>
<br>
<br>
<br>
Go through the following link. You will get a fair idea of gas stoves.<br>
<br>
*<br>
<a href="http://www.kingdombio.com/BiogasBurner1.pdf*" target="_blank">http://www.kingdombio.com/BiogasBurner1.pdf*</a><br>
<br>
Hope this helps you.<br>
<br>
Krishna<br>
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<br>
for more information about digestion, see<br>
Beginner's Guide to Biogas<br>
<a href="http://www.adelaide.edu.au/biogas/" target="_blank">http://www.adelaide.edu.au/biogas/</a><br>
and the Biogas Wiki <a href="http://biogas.wikispaces.com/" target="_blank">http://biogas.wikispaces.com/</a><br>
<br>
<br>
<br>
End of Digestion Digest, Vol 7, Issue 15<br>
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