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Hydraulic olive press

 

Like a hydraulic car jack, the piston squeezes the paste which has been applied to stacks of filter-like discs. In the picture below, the press is on the left.

Advantages:
limited investment
simple and reliable machinery
low energy consumption
pomace has low moisture content
tolerates rocks and sand without wear
no water added, minimal vegetable water disposal

Disadvantages
labor intensive
material left on mats decomposes if not properly cleaned and stored
can produce chemicals responsible for winey and fusty defects
discontinuous process