[Digestion] Floating manure

[frank]

Biogas people
I assume the floating manure is methane getting caught under it and it 
floats to the top? But why does this stop the reaction, production, of 
methane? It should still be wet and under anaerobic conditions.

Thanks
Frank



Jaime Marti Herrero wrote:

>>I haven't worked with cattle manure much. It seems to> float and form a heavy crust that interrupts gas flow.
>>    
>>
> 
>i rescue a mail i sent weeks ago about this subjet:
> 
>Hi everybody.In the last moths im meeting people who is installing tubular biodigesters and they are using 1:2 manure:water rate to feed the biodigesters. From five years ago i started using 1:4 rate (recomended by Lylian Rodriguez and Preston), but from two years ago im using 1:3 because the in some places the are not that much water for 1:4.the reason tu use 1:3 or 1:4 is to avoid the formation of the foam that stop the production of biogas. But if really you can work wiyh a lower rate (1:2) without problems with the foam, this will be a great issue, because the volume required wil be lower and the cost os materials and biodigester as well.So please, have you got good expiriences with low rate manuere:water for long time with out foam?thanks everybodywe keep in contactjaime> Date: Wed, 12 Sep 2007 19:52:41 -0700> From: weiswar at yahoo.com> To: Digestion at listserv.repp.org> Subject: [Digestion] Floating manure> > > > > Do large digesters just add more water? > > My thinking was to weight it down with a steel screen.> Thoughts? > > > > ____________________________________________________________________________________> Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. > http://answers.yahoo.com/dir/?link=list&sid=396545433> > _______________________________________________> 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
>_________________________________________________________________
>Explore the seven wonders of the world
>http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE
>_______________________________________________
>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
>
>
>
>  
>

-- 
Frank Shields
Soil Control Lab
42 Hangar way
Watsonville, CA  95076
(831) 724-5422 tel
(831) 724-3188 fax
frank at compostlab.com
www.compostlab.com