chemical evaluation of olive olive paste and olive oil obtained by a new partial destoner machine implemented in an industrial olive oil extraction plant Prof Alessandro LEONE University of ID: 551572
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Slide1
Physico-chemical evaluation of olive olive paste and olive oil obtained by a new partial destoner machine implemented in an industrial olive oil extraction plant
Prof. Alessandro LEONE
University of Foggia - Italy Department of the Science of Agriculture, Food and EnvironmentSlide2
Olio
Olive oil extraction processSlide3
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The aim of milling is to reduce the olives to a homogeneous paste by breaking the pits, skin and pulp cells
until to produce an olive paste with pit fragments.
When the traditional mechanical crusher is used the olive oil
is
extracted from the olive pasts containing the
pit fragments.
Olive milling by using the mechanical crushers
University of
Foggia,
Department
of the Science of Agriculture, Food and Environment
Olive paste with fragments of the stoneSlide4
Pitting consists in removing the olive pits (used as fuel purpose) and reducing the only pulp into a paste. Following, the olive oil is extract from the olive pastes without the pit fragments.
Olive pitting by using the total destoner machine
University of
Foggia, Department
of the Science of Agriculture, Food and Environment
Real photo of a total
destoner
machine
(Alfa Laval
inc.
)
Pits recoveredSlide5
Total
destoner machine
Positive aspectsMore flavour of the oilsRecovering of
all pits as fuel
(
about
25% of the
olives
)
Husk
can be
used
for
animal
feeding
Negative aspects
Olive paste
is not enough
homogenous for an optimal malaxation
The absence of pit fragments
in the olive paste leads to technological problems
during the malaxation and centrifugal
extraction
loss of oil’s extraction
yield of about 15%for
these reasons the total destoner
is no longer used
Real photo of the total
destoner machine (
Pieralisi inc.)Slide6
The goal of the research
To design and develop a new destoner machine model that allowed to recover
part of pit fragments (about 50%) and to avoid
losses in extraction
yield
.
University of
Foggia,
Department
of the Science of Agriculture, Food and EnvironmentSlide7
Partial destoner machine
University of
Foggia, Department of the Science of Agriculture, Food and Environment
Reel
pitting
Real photo of the partial
destoner
machine
Rotary
drumSlide8
Comparative tests
University of
Foggia, SAFE Dept.
Viscosity
of the olive
pastes
Olive
oil
extraction
yield
Olive
oil
quality
Coratina
variety
Malaxation
t T: 40’; 27°C
Mass flow rate: 3000 kg/h
PDM
HCSlide9
Results
: viscosity
University of Foggia, Department of the Science of Agriculture, Food and EnvironmentSlide10
Results
: quantitative parameters
University of Foggia, Department of the Science of Agriculture, Food and EnvironmentSlide11
Results
: qualitative parameters
University of Foggia, Department of the Science of Agriculture, Food and EnvironmentSlide12
Volatiles compoundSensory evaluation
University of
Foggia, SAFE Dept.Slide13
Physiochemical
characteristics of olive stone
University of Foggia, Department
of the Science of Agriculture, Food and EnvironmentSlide14
Conclusions
it is possible the use of a destoner machine in the oil extraction cycle, but is necessary that a part of olive stone (about 50%) continuous in the processthere is not losses of yields
compared to the traditional crusherthe oils obtained contains more volatile compounds, green fruitiness notes, flavour and aroma than those obtained using the traditional crusherthere is a recovery of 12,5 kg of the pits from 100 kg of olives, as fuel and the pits is better quality compared the pits obtained from the pomace
there are no extra energy costs when the PDM is used respect to the traditional hammer crusher
University of
Foggia,
Department
of the Science of Agriculture, Food and EnvironmentSlide15
Papers
University of
Foggia, Department of the Science of Agriculture, Food and EnvironmentSlide16
Thanks for the attention
Prof. Alessandro LEONE
University of Foggia Department of the Science of Agriculture, Food and Environment