[Digestion] BIOMET model by Mushoe - other models available

[Leslie Gornall]

Hi all, 

I put a simple but rational model of biogas yield and anaerobic digester design on www.practicallygreen.com and this has proven to work on most natural products.  Maize will give some extra yield due to its lower lignin content but still the basic substrate measurement that can be related to biogas is volatile solids, that is loss (of dry matter) on ignition at 550 deg C.   If you only have total solids a good approximation is 80percent of TS = VS for fresh wastes but this percentage can degrade to 60% with aging in say pig or cattle slurry stored before use as biofuel.

We stopped producing the digesters on the web site several years ago after being hit by the BSE epidemic which decapitalized the farming industry in the UK and have concentrated on large scale industrial units but we working to restart in agriculture if the economics prove this to be beneficial in the new climate of energy shortages and global warming.  See also www.zeasystems.com

Best Regards
Les Gornall



> Date: Mon, 11 Feb 2008 18:28:49 +0100
> To: digestion at listserv.repp.org
> From: brunoM1 at telenet.be
> Subject: Re: [Digestion] BIOMET model by Mushoe - other models  available
> 
> And the working link is 
> <www.softplus.net/produkte/biogase.asp>
> 
> ;-)
> Bruno M.
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> At 18:01 11/02/2008, you wrote:
> 
> >Hi Will and all,
> >Unfortunately, I haven't came across this model. For this purpose I am using Biogas! from Arbi in Switzerland. However, you need your degradation and yield parameters for specific crops or biomass. In that case, you can run your own batch tests (BMP) and you can get that information that way. You can always select predetermined crops in the database, or build your own. It is a very user-friendly program, take the time to read through the instructions.
> >You may have to browse around in the German website to find the English download link:
> >www.softplus.net/produkte/biogase.asp%22
> >
> >There is also another model in this paper, with their equation:
> >Biogas production from maize and dairy cattle manure—Influence of biomasss composition on the methane yield
> >Agriculture, Ecosystems and Environment 118 (2007) 173­182
> >They will be hopefuully publishing a more updated model in the upcoming years.
> >
> >Hope that helps a little bit.
> >Terrence
> >--  
> >Terrence Sauvé, B.Eng Bioresource      Research Assistant
> >Alfred Campus - University of Guelph    31 St. Paul Street, P.O. Box 580        Alfred, Ontario, K0B 1A0, CANADA
> >Tel.: 613-679-2218 x602 Fax: 613-679-2420       E-mail: tsauve at alfredc.uoguelph.ca      
> >--------------------------------------------------------------------------------------------------------------------------------------------
> >>>> William Mezzullo <W.G.Mezzullo at bath.ac.uk> 11/02/08 6:41 >>>
> >Hello,
> >
> >Has anyone come across the AD model called BIOMET (presented by Mishoe et. 
> >all 1988). It is a model that considers alternative energy crops that can 
> >be used as feedstock.
> >Does anyone know where I could get hold of this model?
> >Thank you very much
> >
> >Will
> >--  
> >William Mezzullo        Sustainable Energy Research Team (SERT)
> >Dept. Mechanical Engineering    University of Bath      BA2 7AY
> >email - W.G.Mezzullo at bath.ac.uk Telephone - 01225 385 164       
> >http://people.bath.ac.uk/en2wgm/
> >===============================================================================
> 
> 
> -- 
> No virus found in this outgoing message.
> Checked by AVG Free Edition. 
> Version: 7.5.516 / Virus Database: 269.20.2/1271 - Release Date: 11/02/2008 8:16
> 
> 
> 
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org