Just to add a dimension to this conversation, are the true risks of pathogens in the digester effluent so high as to justify pasteurization? I understand that the majority of the microbiotic activity in effluent to be a positive addition to the soil. I ask because so many government officials seem to fixate on this point, when I have not really seen data that shows high enough probability of dangerous pathogens to justify extreme measures. The smallish risk seems reasonable for the benefits of a more living organic fertilizers. Obviously the input material has a lot to do with this aspect, but generally I am interested to hear responses.
Cheers A On Wed, Jul 13, 2011 at 1:55 PM, Johan Carels <[email protected]>wrote: > Dear Johan,**** > > Regarding “pathogens which might create a health hazard. There are > reports on pathogens for man, animal, and plant, which might survive the > biogas process. As the input material of any biogas plant which is not > operated on a farm level may contain many different types of pathogens you > may accumulate these germs even if they are in a low number in the > digestate.”**** > > ** ** > > Suggest to pasturise ( heating at 70°C during 60 minutes) all the > digestate since you hav e this heat available from the cogenerater [cooling > water, turbocooling, exhaust gase-heat]. This will kill all pathogens.**** > > ** ** > > K rgds**** > > Johan Carels**** > > www.jcarels.be**** > > ** ** > > _______________________________________________ > Digestion mailing list > > to Send a Message to the list, use the email address > [email protected] > > 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/ > > > -- Alexander Eaton Sistema Biobolsa IRRI-Mexico RedBioLAC Mex cel: (55) 11522786 US cel: 970 275 4505 [email protected] [email protected] sistemabiobolsa.com www.irrimexico.org www.redbiolac.org
_______________________________________________ Digestion mailing list to Send a Message to the list, use the email address [email protected] 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/
