Whoops: I didn't see the other replies before responding! So some folk do add arsenic to chicken feed! Or did, in the past. Which illustrates another common problem with scare stories: they can be based on very dated information
But my core point stands: AD cannot add it - and, as Paul says, digestion might immobilize it. Duncan On 16 June 2011 13:14, Duncan Martin <[email protected]> wrote: > I guess the rule is arsenic in, arsenic out. > > In other words, digestate can't contain any more arsenic than the raw > chicken manure, so AD cannot make the problem any worse - if it exists at > all. The concn might be higher, because the volume is less - but that's a > red herring. > > The best approach to these scaremongers is to ask the source of their info > - then evaluate it critically. Often it's just internet gossip. > > And even if the info is sound, it might well be specific to a particular > farm with odd local conditions or feed sources - or perhaps a specific > medication added to the feed. I'm no expert on chickens but arsenic (at > above trace background levels) doesn't sound like a likely feed additive. > Would the chickens be fit to eat? > > Duncan J Martin PhD > Clouhgjordan Ecovillage > Ireland > > > > > > > > > > > On 15 June 2011 14:11, Steven Bolgiano <[email protected]> wrote: > >> Hi Group, >> I overheard one of our more local strident activists, when asked about AD >> for poultry comment that the by-product compost from poultry digesters >> contained significant amounts of arsenic. >> >> Can anyone comment on this or other known or potential anti-AD >> Environmentalist issues. Here on the "Delmarva" peninsula over-application >> of raw chicken manure onto the farm fields, and the subsequent runoff into >> our abundance of estuaries and bays is a big issue. Our goal of introducing >> absolute containment with solar heated bladder/ batch systems and a more >> environmentally acceptable compost byproduct .... is supposed to attract a >> positive response from activists. >> >> Comments, Information, Suggestions? >> >> Thanks! >> Steven >> >> -- >> Steven Bolgiano >> Executive Director >> Planet Foundation Ltd. >> 443.235.1344 >> >> >> _______________________________________________ >> 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/ >> >> >
_______________________________________________ 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/
