I have found this:

http://www.pic.uk.net/coppice/coppic...r_recovery.htm

but does not go in deep detail

as far as I understood with the steel wool method you replace silver with iron in the fixing bath, making it more "environment-friendly" to dispose... And you get a silver sludge in the bottom of the bucket. But it has to be refined, right? What about the fixing solution? is it gone forever?