This is the Third series of the simple making biodiesel from Aleks Kac. Before you read this section please read the first series here: introduction part of this simple biodiesel process, and second series here: Equipment for Making Biodiesel.

This third foolproof biodiesel process will talk about test batch and process which need for the making biodiesel. And here are the partial series of the method focused on the process of making biodiesel:

Test batches

Whenever you’re trying a new method, it’s always a good idea to make small test batches of a litre or less first to familiarize yourself with the process before moving on to bigger batches. Most people use kitchen blenders for this — but don’t use it for food again afterwards!

The process

1. Filter the used cooking oil first as usual.

2. For a successful reaction the oil must be free of water. Here are two methods of removing the water content:

(a) Settling the water out: This method saves energy. Heat the oil to 60 deg C (140 deg F), maintain the temperature for 15 minutes and then pour the oil into a settling tank. Let it settle for at least 24 hours. Make sure you never empty the settling vessel more than 90%.

(b) Boiling the water off: Less-preferred method as it uses more energy and helps to form more FFAs in the oil. Heat the oil to 100 deg C (212 deg F). As the heat rises water separates out and falls to the bottom — drain it off to avoid steam explosions. Maintain the temperature until no more steam bubbles rise.

Will continue to the next step on making biodiesel at home using foolproof method of Aleks Kac.

Reference:http://journeytoforever.org/biodiesel_aleksnew.html
Note:I have got a permission from the owner of this article to copy and published here for educational purpose.