[Digestion] Meso and Thermophilic Operating Temperature
Anand Karve
adkarve at gmail.com
Wed Jun 11 19:29:55 CDT 2014
Dear List,
I was told, that biogas plants in colder countries are heated in order
to achieve good biogas production. Is it really necessary? After all
the moors in northern Europe produce biogas at much lower temperatures
than the so called mesophilic temperature prevailing in the tropics.
Can't one use the methanogens from these moors in biogas plants in the
colder regions?
Yours
A.D.Karve
On Tue, Jun 10, 2014 at 2:58 AM, Richard L Vetter
<r.vetter at sbcglobal.net> wrote:
> Good points. By increasing regeneration rate, one can increase loading rate
> and thereby increase total biogas production per fixed reactor volume. I
> have observed somewhat higher methane:carbon dioxide with thermophilic
> temperatures.....but, do not have supporting data. Rich Vetter
>
> R. L. Vetter, PhD; PAS; Dipl. ACAN; President
> AGRI-BIO SYSTEMS, INC.
> 2811 Edgewater Dr. Elgin, IL. 60124
> Tel:847-888-2382
> Fax:847-888-1484
> Cell:630-564-8523
>
>
>
>
> On Sunday, June 8, 2014 9:53 PM, "davidf at kingdombio.co.uk Fulford"
> <davidf at kingdombio.co.uk> wrote:
>
>
> Bram and listers, Hello,
>
> In my book, "Running a biogas programme" (1988) Practical Action, I present
> a simple First Order Rate model, developed at Cornell University. The theory
> separates the concepts of total yield of biogas and the rate of generation.
> Increasing temperature does not increase total yield, but it does increase
> the rate of generation (how quickly you can achieve that total yield). The
> variation of rate with temperature can be modeled with the Arrhenius
> equation, In my book, I present some results that were done by a student of
> mine, which show how the theory works in practice.
>
> Best wishes,
> Dr David Fulford
> Kingdom Bioenergy Ltd
>
> From: "Heegde BA ter, Bram" <b.a.ter.heegde at st.hanze.nl>
> Sent: Friday, June 06, 2014 11:28 AM
> To: "digestion at lists.bioenergylists.org"
> <digestion at lists.bioenergylists.org>
> Subject: Re: [Digestion] Meso and Thermophilic Operating Temperature
>
> Thank you for that HOOROO, a very valuble resource, the S curve is indeed a
> very good fit.
>
> However, it still leaves me with a question, or more of an area that isn't
> quite clear yet. You speak of rate, I assume you mean conversion rate. I've
> always believed and understood that conversion rate and yield are two sides
> of the same coin. If temperature increases the conversion rate, which is
> what the XL model does shows, doesn't it also mean that you are able to
> retrieve more biogas per kg of digestate. Which in my mind is an increase in
> yield. I am aware that at a given temperature the only way to increase yield
> is with loading rate and retention time.
>
> I am however looking at the difference between the gas yield at ambient
> operating temperatures (ca. 20 degrees) and at the mesophilic range. What
> I've understood form quite a few research papers is that the yield and
> coversion rate wil increase.
>
> I think that possibly my understanding in the difference of Yield and
> conversion rate my not be completly correct.
>
> Regards.
>
> Bram ter Heegde
> NAW: 258757
> Mob. Tel: 0653134337
>
> ________________________________________
> From: Digestion [digestion-bounces at lists.bioenergylists.org] on behalf of
> digestion-request at lists.bioenergylists.org
> [digestion-request at lists.bioenergylists.org]
> Sent: 05 June 2014 20:00
> To: digestion at lists.bioenergylists.org
> Subject: Digestion Digest, Vol 45, Issue 2
>
> Send Digestion mailing list submissions to
> digestion at lists.bioenergylists.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org
>
> or, via email, send a message with subject or body 'help' to
> digestion-request at lists.bioenergylists.org
>
> You can reach the person managing the list at
> digestion-owner at lists.bioenergylists.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Digestion digest..."
>
>
> Today's Topics:
>
> 1. Re: Meso and Thermophilic Operating Temperature
> (Heegde BA ter, Bram)
> 2. Re: Meso and Thermophilic Operating Temperature
> (harrisfm at aapt.net.au)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 5 Jun 2014 08:32:31 +0000
> From: "Heegde BA ter, Bram"
> To: "digestion at lists.bioenergylists.org"
>
> Subject: Re: [Digestion] Meso and Thermophilic Operating Temperature
> Message-ID:
> <00C145A1644CD9468CEDDB6B9991F25F11E8C3BF at HPEMB08W28.hanze.nl>
> Content-Type: text/plain; charset="us-ascii"
>
> Thank you for the paper, it is indeed an interesting graph, however not
> quite the one I was looking for.
>
> Maybe I should be a little clearer as to what I am trying to
> achieve/inverstigate.
>
> Two things that I would like to find out are, firstly, what is the effect of
> increasing digester temperature on gas Yield. With this I mean not only the
> absolute amount of gas produced but also the effect that temperature has on
> reaction time of the digester. I would also be interested in if the yield
> increases in an linear pattern in relation to the temperature, or if it is
> exponential/non-linear/etc, This is why I was looking for the graph of temp
> vs. biogas yield. I seem to remember that it wasn't a linear relationship.
> However, form experiments it does look like a linear relationship.
>
> That is the main issue Im trying to solve at the moment.
>
> Secondly I'm interested in the effect of ammonia loading at increased
> digester temperatures.
>
> Met vriendelijke groet;
>
> Bram ter Heegde
> NAW: 258757
> Mob. Tel: 0653134337
>
> ________________________________________
> From: Digestion [digestion-bounces at lists.bioenergylists.org] on behalf of
> digestion-request at lists.bioenergylists.org
> [digestion-request at lists.bioenergylists.org]
> Sent: 04 June 2014 20:00
> To: digestion at lists.bioenergylists.org
> Subject: Digestion Digest, Vol 45, Issue 1
>
> Send Digestion mailing list submissions to
> digestion at lists.bioenergylists.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org
>
> or, via email, send a message with subject or body 'help' to
> digestion-request at lists.bioenergylists.org
>
> You can reach the person managing the list at
> digestion-owner at lists.bioenergylists.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Digestion digest..."
>
>
> Today's Topics:
>
> 1. Meso and Thermophilic Operating Temperature (Heegde BA ter, Bram)
> 2. Re: Meso and Thermophilic Operating Temperature (Les Gornall)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 4 Jun 2014 15:18:59 +0000
> From: "Heegde BA ter, Bram"
> To: "digestion at lists.bioenergylists.org"
>
> Subject: [Digestion] Meso and Thermophilic Operating Temperature
> Message-ID:
> <00C145A1644CD9468CEDDB6B9991F25F11E8C356 at HPEMB08W28.hanze.nl>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Dear all,
>
> I am a student at the Hanze Universtity of Applied Sciences and am currently
> investigating the possibilty of using waste heat to heat a biogas digester.
>
> However, somewhere in my research I came accross a graph depicting the gas
> yield from cow dung in a biogas digester at the meso and at the thermophilic
> range.
>
> It would be very handy to have that graph, and it's source, however I have
> spent the last two days looking for it and can't seem to find it.
>
> Hope someone can point me in the right direction.
>
> Kind regards/Met vriendelijke groet;
>
> Bram ter Heegde
> NAW: 258757
> Mob. Tel: 0653134337
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 4 Jun 2014 16:04:57 +0000
> From: Les Gornall
> To: For Discussion of Anaerobic Digestion
>
> Subject: Re: [Digestion] Meso and Thermophilic Operating Temperature
> Message-ID:
> <4E83BE1704C70148BF9A0FC1ED1B54132DA72501 at EX01.projen.co.uk>
> Content-Type: text/plain; charset="iso-8859-1"
>
> http://www.pelagiaresearchlibrary.com/advances-in-applied-science/vol3-iss3/AASR-2012-3-3-1864-1869.pdf
>
> This paper has a nice graph
>
> Best Regards
>
>
> Les Gornall
> Process Consultant
>
> PROjEN PLC
> Process Consultant
> DD: 01928 752 568
> Email: les.gornall at projen.co.uk
>
>
> PROjEN HOUSE
> Wellfield
> Preston Brook
> Runcorn
> WA7 3AZ
>
> Reception: +44 (0) 1928 752 500
> www.projenbioenergy.co.uk
>
>
>
>
> -----Original Message-----
> From: Digestion [mailto:digestion-bounces at lists.bioenergylists.org] On
> Behalf Of Heegde BA ter, Bram
> Sent: 04 June 2014 16:19
> To: digestion at lists.bioenergylists.org
> Subject: [Digestion] Meso and Thermophilic Operating Temperature
>
> Dear all,
>
> I am a student at the Hanze Universtity of Applied Sciences and am currently
> investigating the possibilty of using waste heat to heat a biogas digester.
>
> However, somewhere in my research I came accross a graph depicting the gas
> yield from cow dung in a biogas digester at the meso and at the thermophilic
> range.
>
> It would be very handy to have that graph, and it's source, however I have
> spent the last two days looking for it and can't seem to find it.
>
> Hope someone can point me in the right direction.
>
> Kind regards/Met vriendelijke groet;
>
> Bram ter Heegde
> NAW: 258757
> Mob. Tel: 0653134337
>
> _______________________________________________
> 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/
>
> Please visit www.projen.co.uk/email-disclaimer.asp to view our email
> disclaimer.
>
>
> This message has been scanned for malware by SurfControl plc.
> www.surfcontrol.com
>
>
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> 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/
>
>
>
> ------------------------------
>
> End of Digestion Digest, Vol 45, Issue 1
> ****************************************
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 05 Jun 2014 18:44:04 +0800
> From: harrisfm at aapt.net.au
> To: "For Discussion of Anaerobic Digestion"
>
> Subject: Re: [Digestion] Meso and Thermophilic Operating Temperature
> Message-ID:
> <052f8c830ce521a35f080bd5003f58000922ea2e at webmail.iinet.net.au>
> Content-Type: text/plain; charset="utf-8"
>
> ?G'day Bram,
> Chen's Model (available in XL as digcalc.zip at
> biogas.wikispaces.com/Online+Course) shows that it is just the RATE
> that changes with temperature, the YIELD only changes with loading
> rate/retention time. If you treat a given volume of effluent for
> longer Retention Times at lower temperatures you will get the same
> volume of biogas. In the "normal" mesophilic range a linear
> relationship of rate to temperature is a good fit, but I found the
> best fit for 10C to 50C(?) is an S curve. I don't have access to XL or
> my files on this computer so can't give more assistance at the moment.
> I have not followed ammonia loading.
> Good luck,HOOROO
>
> ----- Original Message -----
> From: "For Discussion of Anaerobic Digestion"
> To:"digestion at lists.bioenergylists.org"
> Cc:
> Sent:Thu, 5 Jun 2014 08:32:31 +0000
> Subject:Re: [Digestion] Meso and Thermophilic Operating Temperature
>
> Thank you for the paper, it is indeed an interesting graph, however
> not quite the one I was looking for.
>
> Maybe I should be a little clearer as to what I am trying to
> achieve/inverstigate.
>
> Two things that I would like to find out are, firstly, what is the
> effect of increasing digester temperature on gas Yield. With this I
> mean not only the absolute amount of gas produced but also the effect
> that temperature has on reaction time of the digester. I would also be
> interested in if the yield increases in an linear pattern in relation
> to the temperature, or if it is exponential/non-linear/etc, This is
> why I was looking for the graph of temp vs. biogas yield. I seem to
> remember that it wasn't a linear relationship. However, form
> experiments it does look like a linear relationship.
>
> That is the main issue Im trying to solve at the moment.
>
> Secondly I'm interested in the effect of ammonia loading at increased
> digester temperatures.
>
> Met vriendelijke groet;
>
> Bram ter Heegde
> NAW: 258757
> Mob. Tel: 0653134337
>
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> 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/
>
>
>
> ------------------------------
>
> End of Digestion Digest, Vol 45, Issue 2
> ****************************************
>
> _______________________________________________
> 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/
>
>
>
> _______________________________________________
> 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/
>
>
>
>
> _______________________________________________
> 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/
>
>
--
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
More information about the Digestion
mailing list