Disposal help

I found a large animal spine just over a year ago and did some reaearch and degreased it, but I forgot about it and what was supposed to be two weeks in the soap bucket became a year and now I don’t know what to do with it, I’m afraid if I pour it out animals might get into the grease layer on top and get sick, is there any way to safely dispose of it? I don’t want to unleash what might be bio waste into a critter dense environment

UPDATE: I figured out what to do with it, thank you to those who suggested!

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u/JinkxMonsoonIsMom — 11 days ago