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Percolation - Sinolea

 

Rows of metal discs or plates are dipped into the paste. The oil preferentially wets and sticks to the metal and is removed with scrapers in a continuous process.

Advantages
- higher polyphenol content of oil
- low temperature method
- automated
- low labor
- oil/water separation step unnecessary
- low energy requirement

Disadvantages
- often must be combined with one of the above methods to
maximize oil extraction which requires more space, labor, etc.
- large surface areas can lead to rapid oxidation

Sale of future machines are currently outlawed in European Union due to difficulty in cleaning such large surface areas.