Bought a deep fryer a couple years back, once you’re done with it, and let it cool down. You can turn a knob and it will filter itself and empty into a storage container. Once the oil has gone bad, I have a Home Depot bucket with a lid that I dump it into, once that is full I take it to the dump. Once the filtered bits are dumped in the compost, everything else goes in the dishwasher.

I fry in peanut oil, I have 2 air fryers but some things need to be deep fried.