[Digestion] Digestion Digest, Vol 11, Issue 10

Tue May 15 17:53:53 CDT 2007

Hi,
In reply to Mel's response about the diversity of a general culture, I "googled" the word co-fermentation and found that by adding 10% fat of some sort (up to 30%) could double the gas output of a culture.  Considering the bulk one deals with doubling this sounding promising.  
Mike Walter    

> From: digestion-request at listserv.repp.org> Subject: Digestion Digest, Vol 11, Issue 10> To: digestion at listserv.repp.org> Date: Tue, 15 May 2007 13:00:06 -0400> > Send Digestion mailing list submissions to> digestion at listserv.repp.org> > To subscribe or unsubscribe via the World Wide Web, visit> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org> or, via email, send a message with subject or body 'help' to> digestion-request at listserv.repp.org> > You can reach the person managing the list at> digestion-owner at listserv.repp.org> > When replying, please edit your Subject line so it is more specific> than "Re: Contents of Digestion digest..."> > > Today's Topics:> > 1. Re: Digestion Digest, Vol 11, Issue 5 (Carolyn Henri)> > > ----------------------------------------------------------------------> > Message: 1> Date: Mon, 14 May 2007 17:07:24 -0700> From: "Carolyn Henri" <Carolyn at ResourceConsulting.us>> Subject: Re: [Digestion] Digestion Digest, Vol 11, Issue 5> To: <digestion at listserv.repp.org>> Message-ID: <029f01c79685$0458be50$0201a8c0 at OFFICE>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";> reply-type=original> > Don't be dismayed, Steve. There is no such thing as a stupid question. I > am also not a digestion expert, but have learned a great deal from this > forum and made several good contacts who have been helpful in directing me > towards information.> Carolyn Henri> > **************************************************> Carolyn J. Henri, Ph.D.> Resource Consulting Service, LLC> 4805 Belvedere Ave.> Everett, WA 98203> > Phone: (425) 290-3181> Fax: (425) 290-7586> Cell: (425) 308-1634> E-Mail: Carolyn at ResourceConsulting.us> Website: www.ResourceConsulting.us> > **************************************************> ----- Original Message ----- > From: <digestion-request at listserv.repp.org>> To: <digestion at listserv.repp.org>> Sent: Friday, May 04, 2007 10:00 AM> Subject: Digestion Digest, Vol 11, Issue 5> > > > Send Digestion mailing list submissions to> > digestion at listserv.repp.org> >> > To subscribe or unsubscribe via the World Wide Web, visit> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org> > or, via email, send a message with subject or body 'help' to> > digestion-request at listserv.repp.org> >> > You can reach the person managing the list at> > digestion-owner at listserv.repp.org> >> > When replying, please edit your Subject line so it is more specific> > than "Re: Contents of Digestion digest..."> >> >> > Today's Topics:> >> > 1. An apology...and an excuse (Steve Verhey)> > 2. Re: An apology...and an excuse (finstein at envsci.rutgers.edu)> >> >> > ----------------------------------------------------------------------> >> > Message: 1> > Date: Fri, 04 May 2007 07:44:17 -0700> > From: "Steve Verhey" <verheys at hotmail.com>> > Subject: [Digestion] An apology...and an excuse> > To: finstein at envsci.rutgers.edu, duncanjmartin at eircom.net> > Cc: digestion at listserv.repp.org> > Message-ID: <BAY133-F10A55ED1E41C782C76038CA9400 at phx.gbl>> > Content-Type: text/plain; format=flowed> >> >> > There's been talk in the media here about what constitutes a good apology,> > so I know this one will be of low quality, but I am sorry for asking such > > a> > simple question. I do have access to reasonable online sources, but not a> > good physical library, and I don't actively work in this field -- I'm just> > interested in it, and in energy issues in general. I'm pretty sure it > > would> > take me longer than 10 minutes to answer my question. My background is in> > molecular biology and biochemistry, not all that useful. This relatively> > quiet forum seemed a reasonable place to ask the question, which I didn't> > think was off-topic.> >> > That said, the question was my ignorant response to the difficulty/large> > uncertaintly in estimating methane output, which must be mostly due to> > digester-to-digester variability of microbial communities. My impression > > is> > that AD is done with whatever organisms happen to be present, but it > > seemed> > to me that (as some products claim to do with composting) it might be> > possible to inoculate with a particularly enthusiastic microbial > > community,> > or even engineer better methanogens. Apparently this is either not > > possible,> > or is not considered worth thinking about.> >> > Thanks for your patience,> >> > Steve> >> >>From: finstein at envsci.rutgers.edu> >>To: "Duncan Martin" <duncanjmartin at eircom.net>> >>CC: "Steve Verhey" <verheys at hotmail.com>, digestion at listserv.repp.org> >>Subject: Re: [Digestion] Calculating methane production> >>Date: Fri, 4 May 2007 07:32:55 -0400 (EDT)> >>> >>Duncan -> >>> >>As you say (in effect): one man's junk (one microbe's metabolic waste) is> >>another man's treasure (another microbe's substrate). But questioning the> >>complexity of the metabolic web terminating in methane was not what> >>started the thread. Rather, the question asked was - how to estimate> >>methane production.> >>> >>Mel> >>> >>> >> > Come on lads!!> >> >> >> > I might speak only for myself but I think it's an abuse of a forum like> >> > this> >> > for folk to use it as a replacement for ten minutes work in a> >>half-decent> >> > public library or on the internet. I'm more tolerant when the enquiry> >> > comes> >> > from somewhere remote. But I don't think the USA qualifies!> >> >> >> > For info, Steve, yes there is a mass of research and "a particularly> >>good> >> > methanogenic microbial community" is characterized by a great diversity> >>of> >> > species, very many of which are not methanogens. Now, go read!> >> >> >> > Fraternally yours> >> >> >> > Duncan J Martin> >> >> >> > Chair> >> > Republic of Ireland Centre> >> > Chartered Institution of Wastes Management> >> >> >> > ================================> >> > CONTACT DETAILS> >> > Duncan J Martin, PhD, CEng, CSci, MIEI, MCIWM, MIChemE> >> > 24 Townsfield, Cloughjordan, N Tipperary, Ireland> >> > Mobile: +353 86 8377 906> >> > Home: +353 505 42087> >> > Email: duncanjmartin at eircom.net> >> > ================================> >> >> >> >> >> >> >> >> >> > ----- Original Message -----> >> > From: "Steve Verhey" <verheys at hotmail.com>> >> > To: <finstein at envsci.rutgers.edu>; <digestion at listserv.repp.org>> >> > Sent: Thursday, May 03, 2007 11:13 PM> >> > Subject: Re: [Digestion] Calculating methane production> >> >> >> >> >> >>> >> >> Presumably not all organisms in an anaerobic environment are> >> >> methanogens.> >> >> Is> >> >> there research on what a particularly good methanogenic microbial> >> >> community> >> >> looks like? Maybe it's even possible to make an inoculum that would > >> >> get> >> >> things started off in the right direction?> >> >>> >> >> Steve Verhey, Ph.D> >> >> Biologist at Large> >> >> Ellensburg, WA USA> >> >>> >> > _________________________________________________________________> > Exercise your brain! Try Flexicon.> > http://games.msn.com/en/flexicon/default.htm?icid=flexicon_hmemailtaglineapril07> >> >> >> >> > ------------------------------> >> > Message: 2> > Date: Fri, 4 May 2007 11:14:03 -0400 (EDT)> > From: finstein at envsci.rutgers.edu> > Subject: Re: [Digestion] An apology...and an excuse> > To: "Steve Verhey" <verheys at hotmail.com>> > Cc: finstein at envsci.rutgers.edu, digestion at listserv.repp.org> > Message-ID:> > <50830.72.84.59.43.1178291643.squirrel at webmail.envsci.rutgers.edu>> > Content-Type: text/plain;charset=iso-8859-1> >> > Not a problem, Steve -> >> > Your background in molecular biology and biochemistry is actually central> > to the matter. But - and a big but it is - not in the clean context of> > pure culture systems being fed nice uniform substrates. Think of the vast> > range of substrates in garbage, and the vast array of organisms and enzyme> > systems needed to transform that mess to CO2, H2O and CH4! The idea of> > adding some special inoculum or biocatalyst to bring it about - or even to> > accelerate it - becomes absurd. Same for composting, sewage treatment, etc> > etc. Think nature guided by appropriate technology.> >> > Mel> >> >> >> >> There's been talk in the media here about what constitutes a good > >> apology,> >> so I know this one will be of low quality, but I am sorry for asking > >> such> >> a> >> simple question. I do have access to reasonable online sources, but not a> >> good physical library, and I don't actively work in this field -- I'm > >> just> >> interested in it, and in energy issues in general. I'm pretty sure it> >> would> >> take me longer than 10 minutes to answer my question. My background is in> >> molecular biology and biochemistry, not all that useful. This relatively> >> quiet forum seemed a reasonable place to ask the question, which I didn't> >> think was off-topic.> >>> >> That said, the question was my ignorant response to the difficulty/large> >> uncertaintly in estimating methane output, which must be mostly due to> >> digester-to-digester variability of microbial communities. My impression> >> is> >> that AD is done with whatever organisms happen to be present, but it> >> seemed> >> to me that (as some products claim to do with composting) it might be> >> possible to inoculate with a particularly enthusiastic microbial> >> community,> >> or even engineer better methanogens. Apparently this is either not> >> possible,> >> or is not considered worth thinking about.> >>> >> Thanks for your patience,> >>> >> Steve> >>> >>>From: finstein at envsci.rutgers.edu> >>>To: "Duncan Martin" <duncanjmartin at eircom.net>> >>>CC: "Steve Verhey" <verheys at hotmail.com>, digestion at listserv.repp.org> >>>Subject: Re: [Digestion] Calculating methane production> >>>Date: Fri, 4 May 2007 07:32:55 -0400 (EDT)> >>>> >>>Duncan -> >>>> >>>As you say (in effect): one man's junk (one microbe's metabolic waste) is> >>>another man's treasure (another microbe's substrate). But questioning the> >>>complexity of the metabolic web terminating in methane was not what> >>>started the thread. Rather, the question asked was - how to estimate> >>>methane production.> >>>> >>>Mel> >>>> >>>> >>> > Come on lads!!> >>> >> >>> > I might speak only for myself but I think it's an abuse of a forum> >>> like> >>> > this> >>> > for folk to use it as a replacement for ten minutes work in a> >>>half-decent> >>> > public library or on the internet. I'm more tolerant when the enquiry> >>> > comes> >>> > from somewhere remote. But I don't think the USA qualifies!> >>> >> >>> > For info, Steve, yes there is a mass of research and "a particularly> >>>good> >>> > methanogenic microbial community" is characterized by a great> >>> diversity> >>>of> >>> > species, very many of which are not methanogens. Now, go read!> >>> >> >>> > Fraternally yours> >>> >> >>> > Duncan J Martin> >>> >> >>> > Chair> >>> > Republic of Ireland Centre> >>> > Chartered Institution of Wastes Management> >>> >> >>> > ================================> >>> > CONTACT DETAILS> >>> > Duncan J Martin, PhD, CEng, CSci, MIEI, MCIWM, MIChemE> >>> > 24 Townsfield, Cloughjordan, N Tipperary, Ireland> >>> > Mobile: +353 86 8377 906> >>> > Home: +353 505 42087> >>> > Email: duncanjmartin at eircom.net> >>> > ================================> >>> >> >>> >> >>> >> >>> >> >>> > ----- Original Message -----> >>> > From: "Steve Verhey" <verheys at hotmail.com>> >>> > To: <finstein at envsci.rutgers.edu>; <digestion at listserv.repp.org>> >>> > Sent: Thursday, May 03, 2007 11:13 PM> >>> > Subject: Re: [Digestion] Calculating methane production> >>> >> >>> >> >>> >>> >>> >> Presumably not all organisms in an anaerobic environment are> >>> >> methanogens.> >>> >> Is> >>> >> there research on what a particularly good methanogenic microbial> >>> >> community> >>> >> looks like? Maybe it's even possible to make an inoculum that would> >>> get> >>> >> things started off in the right direction?> >>> >>> >>> >> Steve Verhey, Ph.D> >>> >> Biologist at Large> >>> >> Ellensburg, WA USA> >>> >>> >>> >> _________________________________________________________________> >> Exercise your brain! Try Flexicon.> >> http://games.msn.com/en/flexicon/default.htm?icid=flexicon_hmemailtaglineapril07> >>> >> >> >> >> > ------------------------------> >> > _______________________________________________> > Digestion mailing list> > Digestion at listserv.repp.org> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org> >> > End of Digestion Digest, Vol 11, Issue 5> > ****************************************> >> > > > > > > > ------------------------------> > _______________________________________________> Digestion mailing list> Digestion at listserv.repp.org> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org> > End of Digestion Digest, Vol 11, Issue 10> *****************************************
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