Purifying Used Cooking Oil


This investigatory project determines the possibility of purifying used cooking oil using sedimentation method. The activated carbon was also used in the experiment to absorb some dissolved substances in the oil. There were three different setups used in this study namely; Setup 1 (sedimentation was done once); Setup 2 (sedimentation was done twice); and Setup 3 (sedimentation was done thrice).

The purified oil was compared to commercial oil in terms of color, odor, and clearness using acceptability test. Viscosity test was also done in the laboratory.

The means of the samples were compared and revealed that purified oil had no significant difference to commercial cooking oil in terms of color/clearness and odor as the result of the acceptability test. Therefore, sedimentation is a possible method of purifying used cooking oil.


Oil used in cooking foods is commonly derived from vegetables. Cooking oil is commonly used for frying. Oil used for frying is usually thrown away.

This study tried to find a way to purify used oil.

Materials & Equipment

Selected References:

Johanson G., 1993. Swedish quality requirements for oil used for margarine, and some comparative analyses of edible oils, In: P.D. Turner (editor), The Quality and Marketing of oil Product. Incorporated Society of Planters, Kuala Lumpur, pp. 20-31. Wolvesperges, A., 1992. Factors affecting the quality of oil, In: P.D. Turner (editor), The Quality and Marketing of oil Product Incorporated Society of Planters, Kuala Lumpur, pp. 45-52. Cocks, L.V. and Van Rede, C., 1993. Laboratory handbook for oil and fat analysis, Academic Press, London, p. 419.

Further clarification of the procedures and results should be directed to the researchers and adviser.

Cornelio S. Santiano
Mark Anthony M. Waminal
Gian Dave C. Dimla

Mrs. Racquel C. Diaz
Talavera National High School


  1. Can I also ask for the materials, procedures and results of the experiment?
    Thank you very much in advance!

  2. Can I have the full procedure and mayerials for this project. This is a great discovery. Many thanks to the researchers and advisers who did this project.
    Cornelio S. Santiano
    Mark Anthony M. Waminal
    Gian Dave C. Dimla

    Mrs. Racquel C. Diaz
    Talavera National High School

  3. Hi is it possible for me to get the lists of materials and equipt and procedure as well on how to purify used cooking oil?

  4. can you please forward the whole project to me please i am interested in trying it at home ..just forward it to my email.

  5. Hey , this experiment is a smart and has a very good approach on conserving oil. I request you to please send me the materials required and the procedure and other necessary information to carry out this experiment.
    Thank you

  6. May I please request the materials and procedure of this investigatory project? Thanks in advance. Email is much appreciated.

    1. Materials:
      – saucepan
      – cheesecloth
      – strainer
      – knife
      – cutting board
      – ginger
      – used oil
      – air-sealed container (empty)

      1. Peel and chop the ginger into small pieces.
      2. Cut Cheesecloth, to the same size as your strainer.
      3. Heat the used Oil in the Saucepan for 2-3 minutes on medium heat.
      4. Pour the heated Oil through a strainer, with a bowl underneath.
      5. Heat the Oil again this tie for 5-7 minutes on low heat, then add the chopped ginger to the oil and heat for another 2-3 minutes.
      6. Pour the liquid through a strainer lined with Cheesecloth, with an empty container underneath.
      7. Close the lid and your done.

      You’re welcome in advance :))

  7. Hi is it possible to ask for the full procedures and the materials for this investigatory project? Thank you!

  8. Hi what are the procedures and materials needed in this experiment? Can I have the answers by a day from now.

  9. Hi! Can I have the whole copy of the project? I am very interested to try the project coz its very simple and environment friendly. Just send it to my email. tnx in advance!

  10. Hello. Can I have the complete materials, procedures, and the result of the project please and thankyou very much. By the way congratulations on discovering this.

  11. Hi. Can I have the complete materials, procedures on how you do the experiment, and the result of your project please and thankyou very much.

  12. Awesome scientific project. May I have please the materials and procedure of this investigative project?

  13. hi can you give me a full details for this SIP, my son need it, and this is the one he chose to present as his project..

  14. hello … please send me a copy of the material for this investigatory project I’ am interested to know this cause i used to threw my used oil to the trash everyday.. maybe it help me a lot, and save money for buying oil…. thank you.

  15. hi hello to the researcher, can I ask favor to send me the procedure and material for this investigatory project? I am so interested to make use this since we have lots of used oil at home…

    thank you in advance for your response

    please send me in my email samdy092109@gmail.com, thank you and more power!

Leave a Comment

Your email address will not be published.