Consider, also, that most economic endeavors will seek to minimize waste, or failing that, try to find a marketable use for that waste product. For an example, skimming and processing fuel could result in a lot of ammonia byproducts. As a farmer, I can tell you that we were paying over $1000/ton for the stuff a couple of years ago. An ag world would have use for it. There's probably a use for almost anything out there, if one can identify it and market it. Lots of possibilities in system.