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Separation of olive oil from olives (Olive Oil (Process of separating (oil…
Separation of olive oil from olives
Olive Oil
Comes from olives
Process of separating
oil from olive pit and pulp
Oil and water do not mix
Warm water added to extra virgin olive oil
Flush away bitterness of olives
pure olive oil mixed with extra virgin olive oil
Separation process
Modern
Crushing/Grinding
Use mills or grinders
Olive paste produced
Malaxing
trough with spiral mixing blades
Temperature monitored
not heated above 27°C
Preparation
Leaves removed
olives cleaned
Separation of solids/water from oil
mix passed through centrifugal extractor
Separate pomace from oil
Polishing
passed through another separator
removes any remaining water
traditional
Crushing
olives into paste
release of oil from the vacuoles
Use of large granite stones
separates the oil/water from solids
Malaxing (mixing)
small oil droplets combine with larger ones
Olives well grounded
produces desirable flavours/aromas
Longer mixing times
increase yield
increase oxidation
decrease shelf life
decrease quality
Spread on fibre disks
Pressure applied to disks
to get liquid phases
Decantation of oil and water
Sinolea Method
stainless steel comb
dips into olive paste
Thin layer of oil
wiped off into bowl
different surface tension
Affiorato Method
olives are hand harvested
lightly crushed
placed in containers
wait for oil to rise to surface
oil skimmed off top
not very common
Products of separation
Separation of olives
Makes olive oil
Uses of Olive oil
food
Dressing
baking
adds flavour
frying
Healthier
adds flavour
Beauty
Hair treatment
Lip scrub
Makeup Remover
Brush
eye
Waste products
waste water
dump in waterways
pollution
pumping of farmland
damages soil
reduces crop yields
solid residue
pollution
Prevention
Waste water
mixed with cypress sawdust
mixture was rapidly dried
water was collect as it evaporated
used for irragtion
dried material
Pyrolysis
organic material
subject to high temps.
absence of oxygen
decompose
charcoal pellets
used as crop fertiliser
combustible gas
collected
condensed into bio oil
heat source
drying process
pyrolysis process
Separation Processes Types
Decantation
Separation of liquid from solid
Uses density
Pouring off liquid
leave solid undisturbed at bottom
Centrifugation
Mixture of substances containing different sized particles
spinning rapidly
Larger particles settle to bottom
properties
Differing densities
Oil and vegetation water
Allows for Decantation to occur
Liquid and solid parts
Solid parts can be removed
differing particle size
allows centrigugation to occur
fast rotation of of motor