This gentle agitation helps to aggregate the tiny oil droplets into larger ones, making them easier to separate from the solid particles and water. The first stage involves washing the olives to remove dirt, dust, and agricultural chemicals.
Mechanical Harvesting Olive Oil: How It's Done
This involves slowly mixing the paste in a horizontal mixer for a short period, typically 20 to 45 minutes. Workers carefully select olives by clipping them from the tree, ensuring only the best fruit is gathered.
They are then ground into a fine paste, traditionally between granite millstones or modern steel crushers. Temperature control is vital during this stage; overheating can damage the delicate flavors and antioxidants, so many producers use cold water or cool air to keep the paste below 27°C (80°F), a threshold defined for "cold-pressed" oils.
Mechanical Harvesting: How It Works and Its Impact on Olive Oil Quality
Processing Method Description Impact on Flavor Stone Mill Slow grinding with granite wheels Rich, complex, and aromatic Hammer Mill High-speed crushing with steel hammers More intense, sometimes bitter Disk Mill Ribbed disks that grind and crush Clean, balanced profile The Malaxation Phase After grinding, the paste undergoes a crucial phase known as malaxation. Harvesting: The Critical First Step The quality of olive oil is fundamentally determined at the moment of harvest.
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