It’s entirely possible that making biodiesel may be a new concept to you. Maybe you will have seen one of those soy powered buses around the place, peaking your interest, or you might just be fed up with those horrible prices at the petrol station. Have you calculated the size of your carbon footprint yet? We’re all stopping to think about how we contribute to an overall problem of global warming and as we see the politicians treading water, we’re considering what we can do to push.

Some people think that they cannot make biodiesel fuel cost effectively or safely, but they are incorrect. Many thousands of people do this and use the fuel that they manufacture to get back and forth to work each day and live their lives normally. So long as you have a modicum of common sense and take some time to understand the process, you will be able to proceed perfectly well. However, all the materials that you need are readily available and you do not need a degree in chemistry to help you to get through it!

It’s essential to remember that you should beware of using any overly simplistic advice or a simply written ‘how to,’ like this one that follows, and before actually attempting to make biodiesel, you’ll need to have exacting information of the process itself and all safety requirements:

Making homemade biodiesel involves a process known as transesterification. You will be using a catalyst (lye) to remove glycerine from vegetable or animal oils or fats and you will effectively be extracting the oil that you can use in your diesel engine.

The catalyst you need is basically potassium hydroxide or sodium hydroxide, also known as caustic soda and you also need methanol. Note that you will need to keep the lye and the methanol in water tight containers and you should be aiming to use as pure a product as you can.

Take a sturdy plastic container, insert 200 mL of methanol and add the caustic soda. All containers, including the plastic bottle should be tightly closed. Ensure that everything is dissolved by shaking the container vigorously.

Preheat the soy or vegetable oil to about 130°F and pour it into a blender. Add the mixture, close and blend for 30 minutes. The resulting mixture should be decanted into a large and strong bottle with a tight lid. After 24 hours of settling, the glycerine, which is the darker colour, is settled on the bottom. When this is the case, extract the biodiesel, essentially the top layer into a clean jar, being careful not to get any of the glycerine layer mixed in.

Next you will need to wash your resultant mixture to remove the remaining imperfections by adding clean water, then letting it settle for about four hours or so, and finally allowing the water to drain through a hole in the bottom of your container that you will have made earlier on.

If everything is not clear, repeat the process, but when you are happy with the clarity, the water will have evaporated and you will have your first version of biodiesel fuel. Now that you know that making biodiesel is possible, look into finding more detailed information on the process and get some essential safety advice, before you begin!

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