GW,

I'm going to think about Green Ghost question carefully before I answer... In the mean time I found the neatest patent using fly larvae to dispose of waste in Space and THEN feeding a protein paste back to the humans in the ship... CHECK THAT OUT.

http://www.google.com/patents?id=o0IUAAAAEBAJ&printsec=abstract&zoom=4

I hope the link post without a problem...

biopod