Feed that used in biodiesel plant at PT Badak NGL since 2015 is waste cooking oil from PT Badak NGL's Mess Hall. The purpose of this study is to add more variation of feed that can be treated in existing biodiesel plant at PT Badak NGL. Feeds that is going to be used in this research are fish waste, coconut waste and used cooking oil from local resturant. All of the oil from feeds will be added to existing biodiesel plant with two specification, such as FFA (<1%) and water (<0,5%). The fish oil and coconut oil will be extracted by Wet Method which is using water as the oil solvent. From the lab scale experiment, using Wete Method produce an averaged number of 11,25 mL of fish oil per kilogram fish waste and 10,5 mL coconut oil per kilogram coconut waste. The %FFA content of fish, coconut and used cooking oil is 7,5%, 2,5%, and 3,5% respectively. All of the oil will be mixed with ratio 1 : 1 : 2, which the used cooking oil is the highest ratio. The reactant needed can be obtained from the lab scale experiment's data. The next step are evaporation and esterification which are used to reduce the water and FFA content using heat, H2SO4 and Methanol. After esterification, the crude oil should be cleaned first to remove its reactant and water remnant before being sent to the biodiesel plant.