Waste veg oil

[Dum-Dum]

IIRC the large fast food restaurants were storing it in large tanks out back, people were just driving round in a van and pumping them dry.
Then making bio and clearing a tidy profit.

Yeah when I worked in McDonalds we had a 55gal drum in the back yard that it got poured into. Not sure it would of made great bio as it was totally open to the elements as there was no cap.

I am tempted to try and pump out the waste cooking oil disposal at the local tip for some free fuel but as its technically theft I wont.