Drying Process
Advantages.—Cost of plant is less, due to equipment and space required; the operating costs are less, due to amount of labor and power required.
Disadvantage.—Carbonizing of the grease in the dryer, due to high temperature required, so that the maximum amount of grease is not recovered; the material is not broken down so that solvent will act as readily on grease particles to allow maximum recovery; the mechanical condition of by-products is not as desirable without additional treatment; there is a greater volume of gases to be deodorized.