Bio-diesel oil is green reborn energy, which achieved by the reaction between alcohol (methanol, ethanol ) and fat crop like soy and rapeseed, fat forest fruit like oil palm and yellow wood, fat water vegetable like algae, and also animal fat, wasted edible oil.Bio-diesel oil is used as fuel, being excellent replacement for petroleum diesel oil.Bio-diesel oil is typical "green energy". Which good for the economy continuously developing, and has important strategic meaning at improving energy replacement, reducing environment pressure, controlling the atmospheric pollution.

 Centrifuges can be used in the following process stages in virtually all of the following:

1.Separation of methyl ester and glycerine/catalyst/sap/methanol

2.Washing of methyl ester

3.Separation of fatty acids from glycerine.

4.Separation of salts from glycerine.