Olive oil is extracted from olives using different pressing methods. Here's a breakdown of the process:
Traditional Olive Oil Pressing
Historically, olives were processed in the following way:
- Grinding: Olives were ground into a paste using stones.
- Pressing: The paste was then spread on straw or burlap mats. These mats were stacked, and pressure was applied to extract the oil.
Modern Olive Oil Pressing
The methods used today have largely evolved, though some older techniques are still used in certain areas:
Hydraulic Presses
Modern olive oil production often involves a hydraulic press made of metal. In this process:
- Olive paste is loaded into the press.
- The hydraulic press applies significant pressure, squeezing out the oil.
Centrifuges
- Most modern manufacturers use centrifuges instead of presses.
- This method is faster and more efficient.
Key Differences Between Methods
| Method | Description | Efficiency |
|---|---|---|
| Stone Grinding & Mat Pressing | Traditional method using stones and straw or burlap mats | Low |
| Hydraulic Press | Metal presses are used to apply pressure to olive paste. | Medium |
| Centrifuges | Most manufacturers have transitioned to centrifuges for more efficient and quicker oil extraction. | High |
