Tips And Advices - Make Biodiesel From Fry Oil

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Titrate Your Waste Cooking Oil

Measure out 1 gm of lye on the metric scale, and add it to 1 L of distilled water in one of the beakers. You can make your own lye from the eHow tutorial explaining it.

Dissolve 1 ml of the waste oil into 10 ml of isopropyl alcohol in the other beaker. Use a graduated cylinder to measure it. Warm the outside of the beaker in a hot water bath and stir the oil and alcohol with chopsticks until the mixture becomes clear. Add 2 drops of phenolphthalein solution.

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Use the pipette to add the lye solution by individual drops to the oil and alcohol until the mixture turns dark pink and remains that way for 15 seconds. Write down the number of milliliters of lye solution you added. Add the number of milliliters of lye solution to 3.5. The result is how many grams of lye you need to add to each liter of waste oil from this batch.

h4>Make Biodiesel Fuel

Pour 200 ml of methanol into the HDPE container with a funnel. Put the lid back on the container of methanol and use the other funnel to add the amount of lye you figured out at the end of the titration. Replace the stopper and cap on the HDPE and swirl the mixture in the container. Swirl it until all the lye has dissolved. Once the liquid in the container is clear you're ready to proceed.

Preheat the oil to 130 degrees F and put it in your blender. Add the solution from the HDPE container. Turn the blender on and mix for 20 to 30 minutes. Pour the whole mixture into a clean soda bottle, put the lid back on and let it settle for 12 to 24 hours.

Siphon the top layer into a fresh soda bottle. Leave the darker layer on the bottom alone. If you disturb it, let the mixture settle again. Add 150 ml water to 150ml of the biodiesel in a third bottle, put the cap back on and shake the bottle violently. It should separate after one-half hour with all of the biodiesel on top and all of the water underneath. If it doesn't, try adjusting the mix time in the blender on the next batch of biodiesel.

Fill a fourth soda bottle three-quarters of the way with biodiesel and the rest of the way with tap water. Poke a hole in one of the feet on the bottle and cover the hole with duct tape. Turn the bottle on its side and roll it back and forth with your hands until it's mixed completely. Let it separate like in the test in Step 3. Drain the water out of the hole, but not the biodiesel. Pour the biodiesel into the last soda bottle and repeat this step three times.

Let the cloudy biodiesel clear for up to a few days until it's completely translucent.

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