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Each oil has different characteristics and organoleptic quality, which depend on the production area, the type of cultivars ...

From the olive oil: oil production techniques in history

Oil is a product that marked different economies and different peoples, but is followed closely by the various techniques used for the extraction of this precious product.

One of the oldest techniques used by the Egyptians was to crush the olives with the help of a large stone in a stone quarry. The liquid, through channels, flowed directly into the adjacent cavity. Followed the pressing of the dough, enclosed in a dense crown of olive twigs (a kind of straining primitives), and placed on a flat stone under the weight of some boulders.
The oily must was collected and poured into ceramic vessels, where it was left to stand for some time, so as to allow the oil, more light, surface to be separated from the vegetable water.

A slightly more sophisticated version of the press was represented by torches bag, sturdy cloth bags that were already filled with crushed olives, only to be strongly entangled with the aid of two sticks, input made in the appropriate loops at both ends.

The real revolution in the squeezing occurred but with the introduction of the lever press where the beam due to the load of large boulders on the press column containing braided fiber straining pasta minced olives . Appropriate channels convey the oil in the receptacle.

Greek civilization was already familiar with a method of grinding the olives, much more effective than simple assault with stones or a larger millstones, connected to a central pole, were made rotate within a circular tank, thereby triturante action on the olives.
This technique of grinding olives spread in the years to follow, including the Romans, until you get to us almost unchanged.

During the Greek and Roman developed other forms of squeezing which was based on the principle of leverage "described above, the wedge and the screw later.

And it invented by Archimedes in the third century BC fully spread olive oil industry. It was to replace the traditional drum base with a vertical screw, fixed to the floor and ceiling by two bearings and inserted the end of the beam through an issue. Turning the screw one way or another with a stick could easily raise or lower the beam. Through openings of a second pair of pillars, posts between the floor of the press and the screw was inserted transversely of the strips that raised keeping the beam, facilitate the loading and unloading. Introduced straining at the level of press, are starting to turn the screw pushing the beam downward, and gradually removing the slats from under them were part above the beam as soon as the pressure, the flow of oil, tended to decrease. It was thus ensured a constant pressure until the full pressing of the olives.

These techniques are spread over several centuries until 1700 except for a device invented by Leonardo Da Vinci "clamp for oil.
The horizontal lever at the top, curved right and left counterweight rotates on the pin and acts on the sprocket. This acts as a nut for vertical worm, pressing directly on straining.

A true indication of the evolution of oil production technology, which assumed that an industrial nature, must be sought in the use water as a driving force.
The animal drawn mill stood as a symbol of a household and a predominantly local market. The modern oil mills, given the large size of new plants, abandoned their rural homes and turned into special buildings built on the banks of rivers or served by canals.
The force of water made possible the simultaneous processing of multiple machines, the workers were turned into technicians, workers each to a single production phase.

The extension of hydraulic presses will have to wait for the beginning of the nineteenth century.

In 'nineteenth - century develop new systems for oil extraction:
born the presses or hydraulic presses capable of operating mining until complete exhaustion of residue. There appeared for the first time the central metal guide wire, also called foratina on its surface densely perforated. This supported the tower vertically straining going through all the elements. The oily must be relieved that the pressure was collected in a special container with drain pipes placed at appropriate heights to automatically separate the oil from the vegetation water.

For the separation of oil from the juice extracted by pressing was introduced a new category of cars centrifuges.
These were based on different specific weight of water and oil found in oily must. Within a cone rotating at very high water, pushed by centrifugal force, tends to pull out, leaving the oil relatively lighter, to accumulate toward the center. From exhaust pipes, which communicate with the two different areas of the centrifuge, you look at the output, respectively, water and oil already separated.

The oil obtained by centrifugation was susceptible to marketing.

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