There are different types of oil extraction methods that you can use to separate oil from oil bearing materials. Although some oil bearing materials might require the same method during extraction of oil, there are others that would work well on certain materials only. It is therefore important that you understand what each oil extraction method entails so that you can apply it appropriately. The other thing that you need to note is that there are oil extraction methods that would involve the use of chemical solvents such as hexane while others could work well without a solvent.
No matter the kind of oil extraction method that you choose to employ during production of oil, you need to realize that it should be able to cause no or minimal pollution to the environment. If it is the edible oil that you plan to extract, it should be free from contamination. During extraction, ensure that you not only use clean oil bearing materials but you also see to it that the solvent that you use does not add contaminants to the oil. It is also essential to ensure that you have all the apparatus and ingredients needs. Finally, you need to follow every step needed for complete oil extraction.