I made a test batch of biodiesel for a science experiment and now I have leftover sodium hydroxide, methanol, biodiesel, and glycerin. I have no intention of using the biodiesel and have no idea what to do with it. What should I do to dispose these things? And what do I do with the containers that I used to make the biodiesel? Also can you tell me what I can do to make the stuff nontoxic. I heard that the end product of biodiesel and glycerin will have methoxide in it so what can I do to make it nontoxic?