snip
There is nothing new under the sun. Back in the '80 I managed a
briquetting research lab and a couple of the materials we tested were steam
dried cow and chicken manures. I learned from my customer that they were
triple recycling these materials, cow manure to chickens, chicken manure to
cows, 3X in order to recover all the nurtrients in the feed. If memory
serves, they were already doing the recycling and just looking at other
process equipment for the operation. I hope I am wrong on this but that
was my understanding from the customer at the time. That knowledge sure
took the joy out of eating fried chicken or a steak. Mike Miller
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