... expeller 1, What is Screw peanut oil expeller? Vegetable oils and animal fats are triglycerides, containing glycerine. The biodiesel ... process turns the oils and fats into esters, separating out the glycerine. The ... processing soybean, jatropha,peanut, sesame, rapeseed, cottonseed, sunflower, olive and etc. The grainy seeds of the oil plants, also ...