[Digestion] Digestion Digest, Vol 10, Issue 5

Wed Jun 8 19:07:15 CDT 2011

Si transfiérela, gracias

Rodolfo Bisceglia
PLOTEC SRL 
rbisceglia at plotec.com.ar
Cel.:15-6464-1898
Tel.:4748-0505
Fax: 4846-2704

-----Mensaje original-----
De: digestion-bounces at lists.bioenergylists.org [mailto:digestion-bounces at lists.bioenergylists.org] En nombre de digestion-request at lists.bioenergylists.org
Enviado el: Lunes, 06 de Junio de 2011 04:00 p.m.
Para: digestion at lists.bioenergylists.org
Asunto: Digestion Digest, Vol 10, Issue 5

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Today's Topics:

   1. AD for cow manure (Rex Zietsman)
   2. Re: Biogas microbiology Conference (Marcell Nikolausz)
   3. Re: AD for cow manure (Vianney Tumwesige)

----------------------------------------------------------------------

Message: 1
Date: Sun, 5 Jun 2011 21:31:49 +0200
From: "Rex Zietsman" <rex at whitfieldfarm.co.za>
To: <digestion at lists.bioenergylists.org>
Subject: [Digestion] AD for cow manure
Message-ID: <000901cc23b7$37a131c0$a6e39540$@whitfieldfarm.co.za>
Content-Type: text/plain;	charset="us-ascii"

Paul,

The bladder system I described is Shelby's. He is now living in the USA.

Peter,

Nice system, too small for the scale we are looking at.

Michael,

It is not so much the cost of getting over there and doing the course, it is
my time. I work for myself as a consultant and have to pay the rent. So my
time costs more than the flight and course combined. I agree that I  am
probably looking at covered lagoon processes. The SA farmers you mentioned,
do you know if they ever installed systems?

Kind regards
Rex 

------------------------------

Message: 2
Date: Mon, 06 Jun 2011 13:11:27 +0200
From: Marcell Nikolausz <marcell.nikolausz at ufz.de>
To: For Discussion of Anaerobic Digestion
	<digestion at lists.bioenergylists.org>
Subject: Re: [Digestion] Biogas microbiology Conference
Message-ID: <4DECB5DF.1090308 at ufz.de>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"

Dear Vianney Tumwesige,

I'm in the organizing committee of the "1st International Conference on 
Biogas Microbiology" that will be held in Leipzig between 14th and 16th 
September.
You can find more information on the homepage of our meeting:
www.ufz.de/biogas-microbiology

Best regards

Marcell Nikolausz

Department of Bioenergy (BEN) - in cooperation with DBFZ
Helmholtz Centre for Environmental Research - UFZ
Helmholtz-Zentrum f?r Umweltforschung GmbH - UFZ
Torgauer Strasse 116
D-04347 Leipzig
Germany

phone:  	+ 49 (0) 341 2434 566
fax:      	+ 49 (0) 341 2434 133
e-mail:  	marcell.nikolausz at ufz.de
homepage:	http://www.ufz.de/index.php?de 729		

Das UFZ hat einen neuen Namen:
Helmholtz-Zentrum f?r Umweltforschung GmbH - UFZ

The UFZ has a new name:
Helmholtz Centre for Environmental Research - UFZ

Sitz der Gesellschaft: Leipzig
Registergericht: Amtsgericht Leipzig
Handelsregister Nr. B 4703
Vorsitzender des Aufsichtsrats: MinR Wilfried Kraus
Wissenschaftlicher Gesch?ftsf?hrer: Prof. Dr. Georg Teutsch
Administrativer Gesch?ftsf?hrer: Dr. Andreas Schmidt

--------------------------------------------------------------------------------------------
I. International Conference on Biogas Microbiology
Leipzig, 14-16 September 2011
http://www.ufz.de/biogas-microbiology
biogas2011 at ufz.de

> Hello AD friends,
>
> Hope this email finds you well. I have been following most of the 
> discussions lately, thanks to you all.
>
> Do you know of a conference on Biogas Microbiology to happen at some 
> point in October/November? It will be great to learn about it.
>
> All the best.
>
> -- 
> Vianney Tumwesige
> Director - Green Heat (U) Ltd 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/
>

-- 
Dr. Marcell Nikolausz
Department of Bioenergy (BEN) - in cooperation with DBFZ
Helmholtz Centre for Environmental Research - UFZ
Helmholtz-Zentrum f?r Umweltforschung GmbH - UFZ
Torgauer Strasse 116
D-04347 Leipzig
Germany

phone:  	+ 49 (0) 341 2434 566
fax:      	+ 49 (0) 341 2434 133
e-mail:  	marcell.nikolausz at ufz.de
homepage:	http://www.ufz.de/index.php?de 729		

Das UFZ hat einen neuen Namen:
Helmholtz-Zentrum f?r Umweltforschung GmbH - UFZ

The UFZ has a new name:
Helmholtz Centre for Environmental Research - UFZ

Sitz der Gesellschaft: Leipzig
Registergericht: Amtsgericht Leipzig
Handelsregister Nr. B 4703
Vorsitzender des Aufsichtsrats: MinR Wilfried Kraus
Wissenschaftlicher Gesch?ftsf?hrer: Prof. Dr. Georg Teutsch
Administrativer Gesch?ftsf?hrer: Dr. Andreas Schmidt

--------------------------------------------------------------------------------------------
I. International Conference on Biogas Microbiology
Leipzig, 14-16 September 2011
http://www.ufz.de/biogas-microbiology
biogas2011 at ufz.de

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Message: 3
Date: Mon, 6 Jun 2011 07:32:02 -0700
From: Vianney Tumwesige <trustvianney at gmail.com>
To: For Discussion of Anaerobic Digestion
	<digestion at lists.bioenergylists.org>
Subject: Re: [Digestion] AD for cow manure
Message-ID: <BANLkTinuUSit4gNkC9Dfu-vmN2SHnhSf6w at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hey Rex,

Please contact Greg Austin (greg.austin at agama.co.za), he has a company based
in South Africa. I hope he will be of help.

All the best

On Sat, Jun 4, 2011 at 2:40 AM, Rex Zietsman <rex at whitfieldfarm.co.za>wrote:

> David,
>
> What I have seen down here which sounds and looks attractive is the use of
> bladders. Effectively the "inventor" scraped hollows with adjacent walls
> and
> put in heavy duty bladders that hold about 30m3. He has 11 of them and
> empties and fills one a week with chicken litter. As the bladders are
> black,
> they absorb heat from the sun which helps keep the temperature up. He then
> uses two bladders as his gas storage system. By packing rocks onto the
> bladder, he can pressurise them to deliver gas using PVC piping to his
> generator. His H2S removal system was two 200 litre drums welded together
> and filled with machining swarf. Catchpots served both as flash back
> arrestors and as condensate drains. Each bag costs about $1500.
>
> The benefit of this simple system is that it is easily tested at the
> one/two
> bag size. If successful ie convinces the farmer that it works, it can
> easily
> be expanded. At the same farm mentioned above, the farmer bought an old
> scuba diving tank filling compressor and bought some old gas cylinders. He
> then rigged his tractors and truck to take compressed biogas into their air
> inlets and save diesel that way. So there are ways of extending the use of
> biogas.
>
> If anyone can add to this type of debate, I believe it would be helpful not
> only to me but the list in general.
>
> Kind regards
> Rex
>
> -----Original Message-----
> From: David Fulford [mailto:davidf at kingdombio.com]
> Sent: 04 June 2011 10:59 AM
> To: Rex Zietsman
> Cc: digestion at lists.bioenergylists.org
> Subject: Re: [Digestion] AD for cow manure
>
> Hello Rex and listers,
>
> It depends if you want a set of small cheap systems or a large-scale
> sophisticated system. Farms with >500 cows probably need the type of
> digester that have been developed by various different German companies.
> They are designed to generate power and use hot water from the engine to
> keep the temperature in the digester at an optimum value (35 deg.C). They
> are designed to be as automated as possible. They use both dung and silage
> as the main feedstocks. The only disadvantage is cost.
>
> In other parts of Africa there are small-scale systems that are much
> cheaper, but rely on labour to run them. The majority of these systems use
> the dung from just a few cattle to generate cooking fuel for a family.
> However, there are much larger systems that can be used to run a generator.
>
> I do know of installers based in Tanzania and Kenya, capable of making the
> larger-scale cheaper units, if you would be interested in this approach.
>
> Regards,
>
> David F
>
> Saturday, June 4, 2011, 7:42:52 AM, you wrote:
>
> > Hi all,
>
> > I am going to do something I swore I would never do. Unfortunately, I
> > just don't have the time and know that the folks on this list know far
> > more than me and can point me in the right direction.
> > I live in a rural area where we are subject to occasional power cuts
> > (power lines down mostly due to weather) but, more importantly, our
> > power bills are rocketing as South Africa races to catch up to the
> > rest of the world in terms of cost of power. Historically we had paid
> > off coal fired power plants that gave us the lowest cost of power in
> > the world. Anyway, now that power costs are rising, own generation is
> becoming an economic necessity.
>
> > In my area we have a large number of dairy farms milking >500 cows.
> > These are sizeable operations and the manure they produce is worth
> pursuing.
> > Typically they all have slurry dams and they spread their manure from
> > time to time (much to our temporary dismay while the odour kills us!).
> > The question is: what is an economical way of producing gas? Bear in
> > mind, efficiency is not an issue in this case. What we are talking
> > about is getting gas that can be cleaned up and fed into motors to
> > produce power. I am looking at using 3 litre petrol engines that will
> > push out about 50kW tops. So, we are not looking for anything fancy. A
> > plugflow system would make most sense as they can pump it into the one
> > end while the processed material leaves the other. Heating
> > suggestions? What about using the engine exhaust to heat water and
> > circulate that around the reactor or use it to preheat the incoming
> > feed? Here I was simply thinking of a double tank with hot water in the
> outer tank... any other suggestions?
>
> > The other thing these farmers use a lot of is sileage (chopped maize
> > that is stored and allowed to ferment). Has anyone had experience
> > adding some of this to the AD?
>
> > Looking forward to hearing from you all!
> > Rex
>
>
>
> > _______________________________________________
> > 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.bioen
> > ergylists.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/
>
>
>
>
> --
> Best regards,
>  David
>  mailto:davidf at kingdombio.com
>   ********************************************************************
> Dr David Fulford CEnv MEI, 15, Brandon Ave, Woodley, Reading RG5 4PU
> d.j.fulford at btinternet.com, Tel: +44(0)118 326 9779 Mob: +44(0)7746 806401
> Kingdom Bioenergy Ltd, www.kingdombio.com, davidf at kindombio.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/>
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to Send a Message to the list, use the email address
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to UNSUBSCRIBE or Change your List Settings use the web page
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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/

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