2011-08-032011-08-032011-08-03http://hdl.handle.net/1969.3/2819817 slide Power Point presentation. Created in 2004Coal ash is a waste product of coal-fired power generation. A potential good use for the ash is as a substrate for growing oysters. Dr. Ray demonstrates his experiments with this substrate.en-USbyproduct recyclingoyster growingoyster substratePresentation