Biodiesel: Do you have a method or advice that you can recommend for making biodiesel? I am concerned about the safety and waste disposal aspects.

Biodiesel: Do you have a method or advice that you can recommend for making biodiesel? I am concerned about the safety and waste disposal aspects.
Effect of catalyst and surface area on reaction rate: One of my teachers is doing the above mentioned prac for Yr 11 Chemistry. She has asked for saturated Oxalic acid solution.
This online resource helps students to investigate the catalytic effect.