[Digestion] AD for cow manure

Michael Köttner m.koettner at biogas-zentrum.de
Sun Jun 5 08:51:38 CDT 2011


Hi Rex,

the capital you might have to spend in order to give you asystem which works 
for you and not that you have to work for it so you produce some gas will be 
something. The biogas and the electricity generated will cost you in the order 
of 8 to 12 €cents/ kWh.

We have done surveys world wide and this is the price for electricity from 
biogas anywhere in the world, be it  Africa or Europe. In our experience it is 
not so much the capital expenditure and cost of capital that matters, but the 
running costs and the price you can obtain for the produced gas or 
electricity. 

If you do a black bag type batch system your capital outlay will be less but 
your will only have a fraction of the gas output and no continuous production. 
In a normally run continous lagoon system with 500 plus cows you should be 
able to recover 75 kW plus continuous production of electricity. I think that 
you have a feed in tarrif in S.A. for biogas of around ZAR 1/kWh, this means 
you will be able to earn revenues from electricity production in the order of 
ZAR 1800 per day plus with such a system. The electricity you replace will be 
perhaps even worth more. 

So to learn biogas in a course in the UK is not out of this world ?! We had 
already some farmers from S.A. in our courses and study tours and they have 
not regretted it. 

Best regards

Michael Köttner


Am Sonntag, 5. Juni 2011, 12:13:46 schrieb Rex Zietsman:
> Thanks Michael,
> 
> I will look up the covered lagoon idea as it makes most sense. I am
> unlikely to fly to the UK for a course. What other alternatives do we
> have?
> 
> Kind regards
> Rex
> 
> 
> Date: Sat, 4 Jun 2011 09:20:12 +0200
> From: Michael K?ttner <m.koettner at biogas-zentrum.de>
> To: For Discussion of Anaerobic Digestion
> 	<digestion at lists.bioenergylists.org>
> Subject: Re: [Digestion] AD for cow manure
> Message-ID: <201106040920.12383.m.koettner at biogas-zentrum.de>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> Hi Rex,
> 
> Greetings to South Africa, where I lived and worked for three years on an
> organic pioneering farm in the Cape in the late 80ies.
> 
> What you need is a simple lagoon digester. The stirring and haeting is done
> by a punp and a heat exchanger. Here in germany and Brasil the first
> efficient lagoon digesters are built. We are helping out in South America
> at the moment, but would like to come to S.A. too if opportunity arrises.
> 
> I would suggest one of our courses or study tours to get you in the
> picture.
> 
> Please look at our home page www.biogas-zentrum.de. There is also an
> English button.
> 
> Best regards
> 
> Michael K?ttner
> 
> 
> 
> _______________________________________________
> 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.bioenergyl
> ists.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/





More information about the Digestion mailing list